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126.has-very-light-gray-to-cyan-bluish-gray-gradient-background{background: var(--wp--preset--gradient--very-light-gray-to-cyan-bluish-gray) !important;}.has-cool-to-warm-spectrum-gradient-background{background: var(--wp--preset--gradient--cool-to-warm-spectrum) !important;}.has-blush-light-purple-gradient-background{background: var(--wp--preset--gradient--blush-light-purple) !important;}.has-blush-bordeaux-gradient-background{background: var(--wp--preset--gradient--blush-bordeaux) !important;}.has-luminous-dusk-gradient-background{background: var(--wp--preset--gradient--luminous-dusk) !important;}.has-pale-ocean-gradient-background{background: var(--wp--preset--gradient--pale-ocean) !important;}.has-electric-grass-gradient-background{background: var(--wp--preset--gradient--electric-grass) !important;}.has-midnight-gradient-background{background: var(--wp--preset--gradient--midnight) !important;}.has-small-font-size{font-size: var(--wp--preset--font-size--small) !important;}.has-medium-font-size{font-size: var(--wp--preset--font-size--medium) !important;}.has-large-font-size{font-size: var(--wp--preset--font-size--large) !important;}.has-x-large-font-size{font-size: var(--wp--preset--font-size--x-large) !important;} 127/*# sourceURL=global-styles-inline-css */ 128</style> 129 130<link rel='stylesheet' id='bwg_fonts-css' href='https://www.frozentux.net/wp-content/plugins/photo-gallery/css/bwg-fonts/fonts.css?ver=0.0.1' media='all' /> 131<link rel='stylesheet' id='sumoselect-css' href='https://www.frozentux.net/wp-content/plugins/photo-gallery/css/sumoselect.min.css?ver=3.4.6' media='all' /> 132<link rel='stylesheet' id='mCustomScrollbar-css' href='https://www.frozentux.net/wp-content/plugins/photo-gallery/css/jquery.mCustomScrollbar.min.css?ver=3.1.5' media='all' /> 133<link rel='stylesheet' id='bwg_frontend-css' href='https://www.frozentux.net/wp-content/plugins/photo-gallery/css/styles.min.css?ver=1.8.47' media='all' /> 134<style id="jetpack-stats-inline-css"> 135img#wpstats{display:none} 136/*# sourceURL=jetpack-stats-inline-css */ 137</style> 138<link rel='stylesheet' id='sharedaddy-css' href='https://c0.wp.com/p/jetpack/16.2/modules/sharedaddy/sharing.css' media='all' /> 139<link rel='stylesheet' id='social-logos-css' href='https://c0.wp.com/p/jetpack/16.2/_inc/build/social-logos/social-logos.css' media='all' />
140<script id="jquery-core-js" src="https://c0.wp.com/c/7.0.6/wp-includes/js/jquery/jquery.min.js"></script>
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141<script id="jquery-migrate-js" src="https://c0.wp.com/c/7.0.6/wp-includes/js/jquery/jquery-migrate.min.js"></script>
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142<script id="twbbwg-circle-js" src="https://www.frozentux.net/wp-content/plugins/photo-gallery/booster/assets/js/circle-progress.js?ver=1.2.2"></script>
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143<script id="twbbwg-global-js-extra"> 144var twb = {"nonce":"69a58f313b","ajax_url":"https://www.frozentux.net/wp-admin/admin-ajax.php","plugin_url":"https://www.frozentux.net/wp-content/plugins/photo-gallery/booster","href":"https://www.frozentux.net/wp-admin/admin.php?page=twbbwg_photo-gallery"}; 145var twb = {"nonce":"69a58f313b","ajax_url":"https://www.frozentux.net/wp-admin/admin-ajax.php","plugin_url":"https://www.frozentux.net/wp-content/plugins/photo-gallery/booster","href":"https://www.frozentux.net/wp-admin/admin.php?page=twbbwg_photo-gallery"}; 146//# sourceURL=twbbwg-global-js-extra 147</script>
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148<script id="twbbwg-global-js" src="https://www.frozentux.net/wp-content/plugins/photo-gallery/booster/assets/js/global.js?ver=1.0.0"></script>
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149<script id="sumoselect-js" src="https://www.frozentux.net/wp-content/plugins/photo-gallery/js/jquery.sumoselect.min.js?ver=3.4.6"></script>
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150<script id="bwg_mobile-js" src="https://www.frozentux.net/wp-content/plugins/photo-gallery/js/tocca.min.js?ver=2.0.9"></script>
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151<script id="mCustomScrollbar-js" src="https://www.frozentux.net/wp-content/plugins/photo-gallery/js/jquery.mCustomScrollbar.concat.min.js?ver=3.1.5"></script>
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152<script id="jquery-fullscreen-js" src="https://www.frozentux.net/wp-content/plugins/photo-gallery/js/jquery.fullscreen.min.js?ver=0.6.0"></script>
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153<script id="bwg_frontend-js-extra"> 154var bwg_objectsL10n = {"bwg_field_required":"field is required.","bwg_mail_validation":"This is not a valid email address.","bwg_search_result":"There are no images matching your search.","bwg_select_tag":"Select Tag","bwg_order_by":"Order By","bwg_search":"Search","bwg_show_ecommerce":"Show Ecommerce","bwg_hide_ecommerce":"Hide Ecommerce","bwg_show_comments":"Show Comments","bwg_hide_comments":"Hide Comments","bwg_restore":"Restore","bwg_maximize":"Maximize","bwg_fullscreen":"Fullscreen","bwg_exit_fullscreen":"Exit Fullscreen","bwg_search_tag":"SEARCH...","bwg_tag_no_match":"No tags found","bwg_all_tags_selected":"All tags selected","bwg_tags_selected":"tags selected","play":"Play","pause":"Pause","is_pro":"","bwg_play":"Play","bwg_pause":"Pause","bwg_hide_info":"Hide info","bwg_show_info":"Show info","bwg_hide_rating":"Hide rating","bwg_show_rating":"Show rating","ok":"Ok","cancel":"Cancel","select_all":"Select all","lazy_load":"0","lazy_loader":"https://www.frozentux.net/wp-content/plugins/photo-gallery/images/ajax_loader.png","front_ajax":"0","bwg_tag_see_all":"see all tags","bwg_tag_see_less":"see less tags"}; 155//# sourceURL=bwg_frontend-js-extra 156</script>
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157<script id="bwg_frontend-js" src="https://www.frozentux.net/wp-content/plugins/photo-gallery/js/scripts.min.js?ver=1.8.47"></script>
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229 230 231</head> 232 233<body> 234 235<div id="header"> 236 237 <div class="headerleft"> 238 <h1><a href="https://www.frozentux.net/">Frozentux</a></h1> 239 Yet another site </div> 240 241 <!--Replace the # below with the ad destination url.--> 242 243 <div class="headerright"> 244 <p><a href="https://www.frozentux.net/feed/rss/"><img style="vertical-align:middle" src="https://www.frozentux.net/wp-content/themes/revolution-code-blue/images/rss.gif" alt="Subscribe to Frozentux" /></a><a href="https://www.frozentux.net/feed/rss/">RSS Feed</a><a href="https://www.frozentux.net/comments/feed/"><img style="vertical-align:middle;margin-left:10px;" src="https://www.frozentux.net/wp-content/themes/revolution-code-blue/images/rss.gif" alt="Subscribe to Frozentux" /></a><a href="https://www.frozentux.net/comments/feed/">Comments</a></p> 245<!-- <a href="#"><img src="https://www.frozentux.net/wp-content/themes/revolution-code-blue/images/468x60.gif" alt="Featured Ad" /></a>--> 246 </div> 247 248</div> 249 250<div id="navbar"> 251 252 <div id="navbarleft"> 253 <ul id="nav"> 254 <li><a href="https://www.frozentux.net">Home</a></li> 255 <li class="page_item page-item-3 page_item_has_children"><a href="https://www.frozentux.net/documents/">Documents</a> 256<ul class='children'> 257 <li class="page_item page-item-16 page_item_has_children"><a href="https://www.frozentux.net/documents/iptables-tutorial/">Iptables-tutorial</a></li> 258 <li class="page_item page-item-17"><a href="https://www.frozentux.net/documents/ipsysctl-tutorial/">Ipsysctl-tutorial</a></li> 259 <li class="page_item page-item-20"><a href="https://www.frozentux.net/documents/presentations/">Presentations</a></li> 260 <li class="page_item page-item-28 page_item_has_children"><a href="https://www.frozentux.net/documents/texts/">Texts</a></li> 261 <li class="page_item page-item-35"><a href="https://www.frozentux.net/documents/papers/">Papers</a></li> 262</ul> 263</li> 264<li class="page_item page-item-22 page_item_has_children"><a href="https://www.frozentux.net/projects/">Projects</a> 265<ul class='children'> 266 <li class="page_item page-item-44"><a href="https://www.frozentux.net/projects/cc/">C/C++</a></li> 267 <li class="page_item page-item-49"><a href="https://www.frozentux.net/projects/bash/">Bash</a></li> 268 <li class="page_item page-item-512 page_item_has_children"><a href="https://www.frozentux.net/projects/python/">Python</a></li> 269 <li class="page_item page-item-906 page_item_has_children"><a href="https://www.frozentux.net/projects/plastic-modelling/">Scale modelling</a></li> 270 <li class="page_item page-item-1288 page_item_has_children"><a href="https://www.frozentux.net/projects/3d-models/">3D Models</a></li> 271 <li class="page_item page-item-46"><a href="https://www.frozentux.net/projects/junkyard/">Junkyard</a></li> 272</ul> 273</li> 274<li class="page_item page-item-51 page_item_has_children"><a href="https://www.frozentux.net/personal/">Personal</a> 275<ul class='children'> 276 <li class="page_item page-item-2"><a href="https://www.frozentux.net/personal/about/">About</a></li> 277 <li class="page_item page-item-59"><a href="https://www.frozentux.net/personal/contact/">Contact</a></li> 278</ul> 279</li> 280 </ul> 281 </div> 282 283 <div id="navbarright"> 284 <form id="searchform" method="get" action="/index.php"> 285 <input type="text" value="Search this website..." name="s" id="s" onfocus="if (this.value == 'Search this website...') {this.value = '';}" onblur="if (this.value == '') {this.value = 'Search this website...';}" /> 286 <input type="submit" id="sbutt" value="GO" /></form> 287 </div> 288 289</div> 290 291<div id="wrap"> 292<div id="content"> 293 294 <div id="contentleft"> 295 296 297 <h1><a href="https://www.frozentux.net/2025/06/playing-with-bcache-nvme-write-back-caching-over-hdd/" rel="bookmark">Playing with bcache: NVMe Write-Back Caching over HDD</a></h1> 298 299 <div class="date"> 300 June 20, 2025 by <a href="https://www.frozentux.net/author/admin/" rel="author">Oscar Andreasson</a> · <a href="https://www.frozentux.net/2025/06/playing-with-bcache-nvme-write-back-caching-over-hdd/#respond">Leave a Comment</a><br />Filed under: <a href="https://www.frozentux.net/category/development/" rel="category tag">Development</a>, <a href="https://www.frozentux.net/category/linux/" rel="category tag">Linux</a> 301 </div> 302 303 <p>Over the weekend I decided to revisit bcache, Linux’s block-layer cache system, to try and squeeze more performance out of a large spinning disk by caching it with a small SSD. The concept is simple: attach a fast SSD (in this case, a 256?GB NVMe drive) in front of a slower HDD, and let bcache absorb and smooth out writes using the SSD as a write-back cache.</p> 304<p>Unfortunately, the results were not what I expected. Instead of a big performance bump, I discovered that my NVMe drive—despite being a Samsung MZVLQ256HBJD—is shockingly slow for sustained writes, barely better than the HDD I was trying to accelerate.</p> 305<h2>Setup Steps</h2> 306<p>Here’s the setup I used:</p> 307<ol> 308<li>Wipe the drives<br /> 309Make sure there’s no lingering filesystem or bcache metadata:</p> 310<pre>sudo wipefs -a /dev/sda 311sudo wipefs -a /dev/nvme0n1p4</pre> 312</li> 313<li>Create backing device on the HDD 314<pre>sudo make-bcache --wipe-bcache --block /dev/sda</pre> 315</li> 316<li>Create cache device on the NVMe SSD 317<pre>sudo make-bcache --cache --wipe-bcache --block /dev/nvme0n1p4</pre> 318</li> 319<li>Attach the cache to the backing device<br /> 320Get the cache set UUID and attach it to the backing device:</p> 321<pre># Find UUID
322bcache-super-show /dev/nvme0n1p4 | grep UUID 323 324# Attach (replace UUID) 325echo | sudo tee /sys/block/bcache0/bcache/attach 326</pre> 327</li> 328<li>Enable write-back mode 329<pre>echo writeback | sudo tee /sys/block/bcache0/bcache/cache_mode 330</pre> 331</li> 332<li>Format and mount 333<pre>sudo mkfs.ext4 /dev/bcache0 334sudo mount /dev/bcache0 /mnt 335</pre> 336</li> 337</ol> 338<h2>Benchmarking Reality</h2> 339<p>To get a baseline, I ran a basic fio test directly on a file on my root filesystem, which resides on the NVMe drive:</p> 340<pre>fio --name=test --filename=/home/osan/testfile --size=10G --bs=1M --rw=write \ 341--ioengine=libaio --iodepth=32 --direct=0 342</pre> 343<p>The result: ~194?MiB/s write bandwidth. And that’s not a typo.</p> 344<p>With clat latencies in the hundreds of milliseconds and 99th percentile latencies >2?seconds, the drive showed behavior much closer to a spinning disk than what you’d expect from an NVMe device. Even enabling write-back caching in bcache didn’t improve performance much—it simply matched the NVMe’s raw write speed, which isn’t saying much.</p> 345<p>The disk shows 8GT/s x4 on PCIe Gen3, so the bus isn’t the bottleneck. The drive is just bad at sustained writes—probably DRAM-less and overaggressively optimized for client workloads or bursty activity.</p> 346<p><H2Takeaways</p> 347<p>If you’re planning to use an NVMe SSD as a bcache write-back device, don’t assume all NVMe drives are fast. Many low-end OEM drives—especially DRAM-less models like the MZVLQ256HBJD—fall off a performance cliff under sustained write load.</p> 348<p>In my case, bcache didn’t offer a performance boost because the cache layer was just as slow as the backing device. In retrospect, I would’ve been better off checking the SSD’s sustained write behavior first using something like:</p> 349<pre>sudo nvme smart-log /dev/nvme0n1 350</pre> 351<p>Or running long-duration writes and monitoring latency and thermal throttling.</p> 352<p>There’s still value in bcache—especially if you have a real SSD or enterprise-grade NVMe to use as a cache. But with a sluggish consumer NVMe like mine, bcache turns into a no-op at best and a source of extra latency at worst.</p> 353<div class="sharedaddy sd-sharing-enabled"><div class="robots-nocontent sd-block sd-social sd-social-icon sd-sharing"><h3 class="sd-title">Share this:</h3><div class="sd-content"><ul><li class="share-email"><a rel="nofollow noopener noreferrer" 354 data-shared="sharing-email-1354" 355 class="share-email sd-button share-icon no-text" 356 href="mailto:?subject=%5BShared%20Post%5D%20Playing%20with%20bcache%3A%20NVMe%20Wr
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428Iptables-tutorial</a>.</p> 429<div class="sharedaddy sd-sharing-enabled"><div class="robots-nocontent sd-block sd-social sd-social-icon sd-sharing"><h3 class="sd-title">Share this:</h3><div class="sd-content"><ul><li class="share-email"><a rel="nofollow noopener noreferrer" 430 data-shared="sharing-email-1332" 431 class="share-email sd-button share-icon no-text" 432 href="mailto:?subject=%5BShared%20Post%5D%20Iptables%20tutorial%201.2.3&body=https%3A%2F%2Fwww.frozentux.net%2F2024%2F12%2Fiptables-tutorial-1-2-3%2F&share=email" 433 target="_blank" 434 aria-labelledby="sharing-email-1332" 435 data-email-share-error-title="Do you have email set up?" data-email-share-error-text="If you're having problems sharing via email, you might not have email set up for your browser. 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Unfortunately I never got very far but figured it’s one of those things I’m still really happy to play around with, so I might as well try to finish this entry.</p> 489 490 491 492<p class="wp-block-paragraph">A sparse file is basically an empty file with a size, but you never assign the blocks for the file… so you can wind up with a huge file, but it only uses a small part of the harddrive space which in turn is only filled/take up real disk space as you use the space. The real disk space is not taken up until it’s actually used. This can be really useful for creating harddrive loopback disks for example. Below is an example of how I create an empty image file which takes up 0 bytes of diskspace, but is 512 megabytes in size according to the filesystem.</p> 493 494 495 496<pre class="wp-block-preformatted">oan@work7:~$ dd if=/dev/zero of=file.img bs=1 count=0 seek=512M<br>0+0 records in<br>0+0 records out<br>0 bytes (0 B) copied, 9.0712e-05 s, 0.0 kB/s</pre> 497 498 499 500<p class="wp-block-paragraph">Here we actually create the file, notice the seek 512M. This makes dd jump 512 megabytes forward to write a single zero.</p> 501 502 503 504<pre class="wp-block-preformatted">oan@work7:~$ du -shx file.img<br>0 file.img</pre> 505 506 507 508<p class="wp-block-paragraph">And here you see the amount of disk space actually used by the file at this point. </p> 509 510 511 512<pre class="wp-block-preformatted">oan@work7:~$ mkfs.btrfs file.img<br>SMALL VOLUME: forcing mixed metadata/data groups<br>btrfs-progs v4.0<br>See http://btrfs.wiki.kernel.org for more information.<br>Turning ON incompat feature 'mixed-bg': mixed data and metadata block groups<br>Turning ON incompat feature 'extref': increased hardlink limit per file to 65536<br>Turning ON incompat feature 'skinny-metadata': reduced-size metadata extent refs<br>Created a data/metadata chunk of size 8388608<br>ERROR: device scan failed 'file.img' - Operation not permitted<br>fs created label (null) on file.img<br>nodesize 4096 leafsize 4096 sectorsize 4096 size 512.00MiB</pre> 513 514 515 516<p class="wp-block-paragraph">At this point we create a btrfs filesystem inside the sparse file we previously created. </p> 517 518 519 520<pre class="wp-block-preformatted">oan@work7:~$ du -shx file.img<br>4.1M file.img</pre> 521 522 523 524<p class="wp-block-paragraph">And now you can see that the filesystem metadata that we created uses 4.1 megabytes of actual diskspace. The actual filesystem available should be 512M – 4.1M in size approximately.</p> 525 526 527 528<pre class="wp-block-preformatted">oan@work7:~$ sudo mount -t btrfs -o loop file.img file<br>oan@work7:~$ sudo dd if=/dev/urandom of=./lalala.rand bs=1K count=4K<br>4096+0 records in<br>4096+0 records out<br>4194304 bytes (4.2 MB) copied, 0.344203 s, 12.2 MB/s</pre> 529 530 531 532<p class="wp-block-paragraph">We mount the file system using a loopback device and create a small file of 4M in size. </p> 533 534 535 536<pre class="wp-block-preformatted">oan@work7:~$ du -shx file.img<br>8.1M file.img</pre> 537 538 539 540<p class="wp-block-paragraph">And here you can see how the actual diskspace used has grown to 8.1M in size. </p> 541 542 543 544<p class="wp-block-paragraph">This is a really interesting way of utilizing your diskspace optimally while creating for example yocto builds run locally etc. I hope this can be useful for others as well. </p> 545<div class="sharedaddy sd-sharing-enabled"><div class="robots-nocontent sd-block sd-social sd-social-icon sd-sharing"><h3 class="sd-title">Share this:</h3><div class="sd-content"><ul><li class="share-email"><a rel="nofollow noopener noreferrer" 546 data-shared="sharing-email-967" 547 class="share-email sd-button share-icon no-text" 548 href="mailto:?subject=%5BShared%20Post%5D%20Sparse%20files&body=https%3A%2F%2Fwww.frozentux.net%2F2020%2F01%2Fsparse-files%2F&share=email" 549 target="_blank" 550 aria-labelledby="sharing-email-967"
551 data-email-share-error-title="Do you have email set up?" data-email-share-error-text="If you're having problems sharing via email, you might not have email set up for your browser. You may need to create a new email yourself." data-email-share-nonce="30cce5a199" data-email-share-track-url="https://www.frozentux.net/2020/01/sparse-files/?share=email"> 552 <span id="sharing-email-967" hidden>Email a link to a friend (Opens in new window)</span> 553 <span>Email</span> 554 </a></li><li class="share-facebook"><a rel="nofollow noopener noreferrer" 555 data-shared="sharing-facebook-967" 556 class="share-facebook sd-button share-icon no-text" 557 href="https://www.frozentux.net/2020/01/sparse-files/?share=facebook" 558 target="_blank" 559 aria-labelledby="sharing-facebook-967" 560 > 561 <span id="sharing-facebook-967" hidden>Share on Facebook (Opens in new window)</span> 562 <span>Facebook</span> 563 </a></li><li class="share-linkedin"><a rel="nofollow noopener noreferrer" 564 data-shared="sharing-linkedin-967" 565 class="share-linkedin sd-button share-icon no-text" 566 href="https://www.frozentux.net/2020/01/sparse-files/?share=linkedin" 567 target="_blank" 568 aria-labelledby="sharing-linkedin-967" 569 > 570 <span id="sharing-linkedin-967" hidden>Share on LinkedIn (Opens in new window)</span> 571 <span>LinkedIn</span> 572 </a></li><li class="share-reddit"><a rel="nofollow noopener noreferrer" 573 data-shared="sharing-reddit-967" 574 class="share-reddit sd-button share-icon no-text" 575 href="https://www.frozentux.net/2020/01/sparse-files/?share=reddit" 576 target="_blank" 577 aria-labelledby="sharing-reddit-967" 578 > 579 <span id="sharing-reddit-967" hidden>Share on Reddit (Opens in new window)</span> 580 <span>Reddit</span> 581 </a></li><li class="share-twitter"><a rel="nofollow noopener noreferrer" 582 data-shared="sharing-twitter-967" 583 class="share-twitter sd-button share-icon no-text" 584 href="https://www.frozentux.net/2020/01/sparse-files/?share=twitter" 585 target="_blank" 586 aria-labelledby="sharing-twitter-967" 587 > 588 <span id="sharing-twitter-967" hidden>Share on X (Opens in new window)</span> 589 <span>X</span> 590 </a></li><li class="share-end"></li></ul></div></div></div><div style="clear:both;"></div> 591 592 <div class="postmeta"> 593 <p>Tags: <a href="https://www.frozentux.net/tag/btrfs/" rel="tag">btrfs</a>, <a href="https://www.frozentux.net/tag/dd-seek/" rel="tag">dd seek</a>, <a href="https://www.frozentux.net/tag/filesystem/" rel="tag">filesystem</a>, <a href="https://www.frozentux.net/tag/sparse/" rel="tag">sparse</a>, <a href="https://www.frozentux.net/tag/sparse-files/" rel="tag">sparse files</a> </p> 594 </div> 595 596 597 <h1><a href="https://www.frozentux.net/2018/11/gitea-and-drone-io/" rel="bookmark">Gitea and Drone.io</a></h1> 598 599 <div class="date"> 600 November 9, 2018 by <a href="https://www.frozentux.net/author/admin/" rel="author">Oscar Andreasson</a> · <a href="https://www.frozentux.net/2018/11/gitea-and-drone-io/#respond">Leave a Comment</a><br />Filed under: <a href="https://www.frozentux.net/category/management/configuration-management/" rel="category tag">Configuration Management</a>, <a href="https://www.frozentux.net/category/development/" rel="category tag">Development</a>, <a href="https://www.frozentux.net/category/management/projects/" rel="category tag">Projects</a> 601 </div> 602 603 <p>Recently I’ve been frustrated at work while using Gitlab and Jenkins for various reasons, some of the integrations are really fragile due to some plugins we use, both Jenkins and Gitlab are incredibly bloated and use insane amounts of resources and they are simply not reasonable choices for a private setup. Also I recently replaced my server at home (basically a machine that does almost everything I want at home) from a 32 bit atom to an I5 intel machine with 16 gigs of RAM etc, which means I have totally different resources to work with. For example, 32 bit i386 cpu’s are not supported out of the box by docker, and the cpu was quite overloaded. With the new box I’
603ve been able to play around a little with my setup.</p> 604<p>I’ve previously used just a basic and manual git setup at home, with approximately 110’ish repositories in it. I’ve been playing around with gitea and drone.io at home with the new server and am very pleased with it, even though it took a bit of work to get used to it. In all honesty, I’ve only done fairly basic work with it so far. The only really complex stuff I’ve done was to move my existing git repositories into the gitea environment by scripting a bit and using the gitea web based API.</p> 605<p>Regarding gitea, so far I’ve noticed the following things:</p> 606<ul> 607<li>Very slim by comparison to other options, currently uses around 60 MB of RAM and not a lot of CPU from what I’ve seen. Especially considering what you get.</li> 608<li>UI is fairly similar to gitlab/github.</li> 609<li>Setup was very simple except for database connection (I winded up just using sqlite3 I believe, I was lazy and also don’t expect more than a very few users).</li> 610<li>Pull Request is really nice.</li> 611<li>Issue tracking seems to work fairly well.</li> 612<li>Docker setup with volumes is very easy.</li> 613<li>Seems to have the essentials in plugins etc that I need.</li> 614<li>API seems very nice, I’ve only used it for the migration so far though.</li> 615<li>The only bad part I’ve seen so far is that the administration panel might be a bit spartan at times, but I don’t really mind.</li> 616</ul> 617<p>Regarding drone.io, my first impressions are:</p> 618<ul> 619<li>I absolutely love the yaml file format so far.</li> 620<li>UI is incredibly clean, on the verge of too clean.</li> 621<li>Integration with gitea was super simple once I actually got it working (documentation was not 100% accurate I think).</li> 622<li>Simple to get started with if you have a sane build pattern.</li> 623<li>Nice integration to gitea and you get marks on build statuses etc. Interesting to find if you can block a build from being merged based on build results as well.</li> 624<li>I’ve managed to make a simple build of a playground project I have by adding a Dockerfile which is built into an image when the build is started, then a continuation of the build builds my project inside the docker image we just built.</li> 625<li>First time using docker-compose so it was a bit of a hassle understanding this, but it was fun ;). Not always obvious where some configuration should be placed etc.</li> 626<li>Yaml file format definitely not enough for the type of pipelines we do professionally though :(.</li> 627<li>Pleasantly surprised you can actually add and remove build slaves to the drone.io platform.</li> 628<li>Also pleasantly surprised by how to do parallel build steps. Syntax is super simple.</li> 629<li>I really lack some form of artifact storage, or at least a plugin for something that is not either cloud based or incredibly enterprisey (artifactory). Actually, I’ve had issues just finding a good light weight open source artifact storage so far…</li> 630<li>I also lack some form of nice presentation of various build artifacts, code coverage or unit test results etc.</li> 631</ul> 632<p>In all, pleasantly surprised by how simple this was to setup and configure. It was a fun trip and I’ll continue using it at home for now.</p> 633<p>As a sidenote, for the stuff I have on github, I do like to use travis, it also has a nice syntax and is a nice solution.</p> 634<div class="sharedaddy sd-sharing-enabled"><div class="robots-nocontent sd-block sd-social sd-social-icon sd-sharing"><h3 class="sd-title">Share this:</h3><div class="sd-content"><ul><li class="share-email"><a rel="nofollow noopener noreferrer" 635 data-shared="sharing-email-1072" 636 class="share-email sd-button share-icon no-text" 637 href="mailto:?subject=%5BShared%20Post%5D%20Gitea%20and%20Drone.io&body=https%3A%2F%2Fwww.frozentux.net%2F2018%2F11%2Fgitea-and-drone-io%2F&share=email" 638 target="_blank" 639 aria-labelledby="sharing-email-1072" 640 data-email-share-error-title="Do you have email set up?" data-email-share-error-text="If you're having problems sharing via email, you might not have email set up for your browser. You may need to create a new email yourself." data-email-sh
640are-nonce="21818f4e65" data-email-share-track-url="https://www.frozentux.net/2018/11/gitea-and-drone-io/?share=email"> 641 <span id="sharing-email-1072" hidden>Email a link to a friend (Opens in new window)</span> 642 <span>Email</span> 643 </a></li><li class="share-facebook"><a rel="nofollow noopener noreferrer" 644 data-shared="sharing-facebook-1072" 645 class="share-facebook sd-button share-icon no-text" 646 href="https://www.frozentux.net/2018/11/gitea-and-drone-io/?share=facebook" 647 target="_blank" 648 aria-labelledby="sharing-facebook-1072" 649 > 650 <span id="sharing-facebook-1072" hidden>Share on Facebook (Opens in new window)</span> 651 <span>Facebook</span> 652 </a></li><li class="share-linkedin"><a rel="nofollow noopener noreferrer" 653 data-shared="sharing-linkedin-1072" 654 class="share-linkedin sd-button share-icon no-text" 655 href="https://www.frozentux.net/2018/11/gitea-and-drone-io/?share=linkedin" 656 target="_blank" 657 aria-labelledby="sharing-linkedin-1072" 658 > 659 <span id="sharing-linkedin-1072" hidden>Share on LinkedIn (Opens in new window)</span> 660 <span>LinkedIn</span> 661 </a></li><li class="share-reddit"><a rel="nofollow noopener noreferrer" 662 data-shared="sharing-reddit-1072" 663 class="share-reddit sd-button share-icon no-text" 664 href="https://www.frozentux.net/2018/11/gitea-and-drone-io/?share=reddit" 665 target="_blank" 666 aria-labelledby="sharing-reddit-1072" 667 > 668 <span id="sharing-reddit-1072" hidden>Share on Reddit (Opens in new window)</span> 669 <span>Reddit</span> 670 </a></li><li class="share-twitter"><a rel="nofollow noopener noreferrer" 671 data-shared="sharing-twitter-1072" 672 class="share-twitter sd-button share-icon no-text" 673 href="https://www.frozentux.net/2018/11/gitea-and-drone-io/?share=twitter" 674 target="_blank" 675 aria-labelledby="sharing-twitter-1072" 676 > 677 <span id="sharing-twitter-1072" hidden>Share on X (Opens in new window)</span> 678 <span>X</span> 679 </a></li><li class="share-end"></li></ul></div></div></div><div style="clear:both;"></div> 680 681 <div class="postmeta"> 682 <p>Tags: <a href="https://www.frozentux.net/tag/drone/" rel="tag">drone</a>, <a href="https://www.frozentux.net/tag/drone-io/" rel="tag">drone.io</a>, <a href="https://www.frozentux.net/tag/gitea/" rel="tag">gitea</a>, <a href="https://www.frozentux.net/tag/gitlab/" rel="tag">gitlab</a>, <a href="https://www.frozentux.net/tag/jenkins/" rel="tag">jenkins</a> </p> 683 </div> 684 685 686 <h1><a href="https://www.frozentux.net/2018/11/devops-world-nice-2018/" rel="bookmark">DevOps World Nice 2018</a></h1> 687 688 <div class="date"> 689 November 7, 2018 by <a href="https://www.frozentux.net/author/admin/" rel="author">Oscar Andreasson</a> · <a href="https://www.frozentux.net/2018/11/devops-world-nice-2018/#respond">Leave a Comment</a><br />Filed under: <a href="https://www.frozentux.net/category/management/configuration-management/" rel="category tag">Configuration Management</a>, <a href="https://www.frozentux.net/category/development/" rel="category tag">Development</a>, <a href="https://www.frozentux.net/category/linux/" rel="category tag">Linux</a> 690 </div> 691 692 <p>Long time again, I seem to be bad at updating this site at times.</p> 693<p>I’ve recently moved into DevOps as a coincidence. I feel like this is what I’ve done for ages, but I just never set a name on it really. Also, this time it’s proper DevOps I’d say, a team of people maintaining build environments, CI/CD environments, gitlab, and so forth. It’s been a long time since I did proper server maintenance however, and it’s kind of interesting to see what happened. New tools, new possibilities, containerization, monitoring, virtualization, cloud, and so forth.</p> 694<p>Because of said circumstances, I went to the DevOps World conference (previously Jenkins World I guess) in Nice and was pleasantly surprised by some of the development done to Jenkins and what they are trying to do. I’m a bit cautious with some of the changes though and what I expect of the future. One of my main issues from work is that a lot of the clients we have are very sensitive about where data is stored, to the point where they set up private clouds to keep stuff in house and in many cases blocking internet access almost completely. A lot of the changes in Jenkins and from CloudBees is about mov
694ing stuff into the public clouds from private installations. IE, something that we will not be able to do, even though my company is all for working as open as possible and driving our clients to open up what they are doing as well. There is obviously stuff you don’t want to open as a corporation, but a lot of it is not really specific to you and the help you can receive from collaborating with your competition is actually quite tremendous, hence driving down part costs etc.</p> 695<p>So, all that said. I’m super happy to have been to the conference and have heard a lot new stuff. My main takeaways:</p> 696<p>Jenkins x seems really interesting, it’s basically a stripped down Jenkins master running in kubernetes/cloud swarm but you spin up a new master for every build so the single point of failure is removed in it, and the kubernetes ecosystem for most of the extraneous systems such as web-hooks, etc. The bad part of this is that you loose the Jenkins UI and Jenkins x is completely Command Line Interface based. CloudBees has some proprietary UI’s for Jenkins X however…</p> 697<p>Configuration as Code Plugin seems really nice as I’d really like to easily take my Jenkins Master and create staging environments to test new changes easily. I will be experimenting with this most definitely.</p> 698<p>Speeches about breaking down and splitting down your Jenkins Master and basically divide and conquer. Try to do different things on different servers basically, and don’t create a Jenkinstein with almost all the plugins in a single instance to cater to all types of jobs, etc.</p> 699<p>Jenkins seems to be moving a lot into the public cloud, which unfortunately is bad for our industry as already mentioned. However, I’m really intrigued by the scaling possibilities that was shown using GCP and AWS for example.</p> 700<p>Also, a lot of other good talks.</p> 701<p>All this said, I’ve been experimenting with alternative CI and git hosting solutions, which I find rather interesting and I’ll write more about that in a close future…. 😉</p> 702<div class="sharedaddy sd-sharing-enabled"><div class="robots-nocontent sd-block sd-social sd-social-icon sd-sharing"><h3 class="sd-title">Share this:</h3><div class="sd-content"><ul><li class="share-email"><a rel="nofollow noopener noreferrer" 703 data-shared="sharing-email-1064" 704 class="share-email sd-button share-icon no-text" 705 href="mailto:?subject=%5BShared%20Post%5D%20DevOps%20World%20Nice%202018&body=https%3A%2F%2Fwww.frozentux.net%2F2018%2F11%2Fdevops-world-nice-2018%2F&share=email" 706 target="_blank" 707 aria-labelledby="sharing-email-1064" 708 data-email-share-error-title="Do you have email set up?" data-email-share-error-text="If you're having problems sharing via email, you might not have email set up for your browser. 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This should be fixed now as I’ve moved to letsencrypt using certbot for autorenewal. I hope this should solve the problem for the future.</p> 761<p>As a sidenote, I was attending the DevOps World in Nice last week. Very interesting week, I’
761ll try to write up on some of the topics I found interesting. Also, I’ve been experimenting with “other” solutions than jenkins + gitlab + atlassian tools as of late, I found some rather nice setups using gitea and drone.io that I’ll try to write about as well.</p> 762<div class="sharedaddy sd-sharing-enabled"><div class="robots-nocontent sd-block sd-social sd-social-icon sd-sharing"><h3 class="sd-title">Share this:</h3><div class="sd-content"><ul><li class="share-email"><a rel="nofollow noopener noreferrer" 763 data-shared="sharing-email-1059" 764 class="share-email sd-button share-icon no-text" 765 href="mailto:?subject=%5BShared%20Post%5D%20SSL%20certificate%20updated%20slightly%20late&body=https%3A%2F%2Fwww.frozentux.net%2F2018%2F10%2Fssl-certificate-updated-slightly-late%2F&share=email" 766 target="_blank" 767 aria-labelledby="sharing-email-1059" 768 data-email-share-error-title="Do you have email set up?" data-email-share-error-text="If you're having problems sharing via email, you might not have email set up for your browser. 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The last real commits where 9 years ago and the last proper release is closer to 13 years ago….</p> 821<p>The last two three days I kind of picked it up again, for fun mostly. In the end of my maintenance of the project I kind of burnt myself out on the whole topic, I just did not want to do the whole thing anymore. I’ve grown and changed as a person since then. I don’t have the same spare time for one.</p> 822<p>My first order of business, The build system was always a mess and I started cleaning out stuff that shouldn’t be there. A bunch of old scripts have been removed, I managed to remove the dependency on the fabpdf backend for jade and also the eps_to_png script with that, and almost all of the changes.sh scripts where removed. The Spanish and Portuguese builds where similarly cleaned up. Finally a Travis file was added to get automated builds running on Travis, and this actually works now!</p> 823<p>I’m getting close to making a 1.2.3 release imho to get something new out there. The actual content has barely changed to be honest, maybe a few words at the most, but it feels like something that would be nice to get out there.</p> 824<p>The task of getting this documentation up to par is a tremendous effort to be honest, and I’d be really interested in getting help from anyone who reads this. If you feel like contributing, contact me, check the code out on <a href="https://github.com/frznlogic/iptables-tutorial">github</a>, add bugs/tasks on stuff you find that is wrong, or provide pull requests. I would be thrilled to have other people working on this as well so it becomes more vibrant again and don’t stagnate as it has done over time.</p> 825<div class="sharedaddy sd-sharing-enabled"><div class="robots-nocontent sd-block sd-social sd-social-icon sd-sharing"><h3 class="sd-title">Share this:</h3><div class="sd-content"><ul><li class="share-email"><a rel="nofollow noopener noreferrer" 826 data-shared="sharing-email-1016" 827 class="share-email sd-button share-icon no-text" 828 href="mailto:?subject=%5BShared%20Post%5D%20Iptables-tutorial%20work&body=https%3A%2F%2Fwww.frozentux.net%2F2018%2F04%2Fiptables-tutorial-work%2F&share=email" 829 target="_blank" 830 aria-labelledby="sharing-email-1016"
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I rarely write anything about what I do anymore 🙂 .</p> 884<p>So, I got kids, and I thought it would be fun for them to play some of the old stuff I used to play and found the https://www.raspberrypi.org/blog/raspberry-pi-ikea-arcade-table-make-yourself/ quite interesting and so set out to do something similar. I winded up going to Ikea with the kids and told them to choose colors, we winded up with a pink IKEA Lack table … ;).</p> 885<p>I also got a bunch of old screens at home, I picked a very heavy 17″ monitor and removed all the casings etc greatly reducing the weight. My choice was slightly bad though for two reasons, the connectors are standing at a 90 degree angle to the screen so it winded up not fitting inside the table and it’s pointing out on the underside as it is now… secondly, the viewing angles are so so, I winded up rotating the screen 180 degrees as the viewing angles where much better from that direction and the /boot/config.txt in raspbian systems have options to hardware rotate the output. I also bought a set of 2 joysticks + 20 buttons with built in backlight and a xin mo based usb controller from ebay, a small speaker from a local shop and the power adapters I had at home, and a connector to fit for power input to the table. I decided to pick up a powered USB hub as well to fit so it was reachable from the outside. I also had a sheet of plexiglass lying around for many years which winded up useful. I also had a USB wifi dongle lying around so I reused that for connectivity.</p> 886<p>We started out with measuring out and sawing up the holes needed and then removing the innards that are in the way. I used some paint masking tape to protect the table, more on this later. This work was very easy to do with a dremel with a circular saw addon. The underside wasn’t so important how it looked but I tried to make the cuts decent looking at least.</p> 887<p>Once this was done, I test fitted and probed a bit on how to get the ras
887pberry pi, monitor and power system fitted inside the the table before moving on to sawing the plexiglass sheet into the same size as the table, and then drilling and countersinking the screw holes, temporarily fit the plexiglass while drilling the holes for the joystick + buttons. Some sanding and fixing of edges followed. I removed the plexiglass sheet and drilled and countersunk holes for screwing the joysticks to  the topside of the table underneath the plexiglass.</p> 888<p>Moving on, I screwed in the joysticks and fitted the power adapters for the monitor, USB hub and raspberry pi in the screen. I made 6 foam inserts to rest the monitor on and glued in place inside the table, wired up the monitor and put the monitor in. Removing the paint masking tape I realized that I used some shitty tape with much too hard tacking adhesive, meaning that I managed to pull away a bunch of the foil/tape (the “paint” on the table, it’s not painted, but rather foiled with a layer of colored plastic). When I realized this I started rethinking a paint scheme I had already planned and decided to do some modifications to hide the errors and to possibly heighten the feeling of the table.</p> 889<p>I did the paintjob, made some simple paint masks etc and airbrushed the table with black borders, softish blue and red and green colors further softened with a few drops of white.</p> 890<p>After this had dried for a few days I put the plexiglass on, screwed in all the buttons, joystick heads etc and installed the raspberry pi + other final electronics and tested the system. This is when I realized the problems with the screen viewing angle so I had to back everything up, remove the buttons, joysticks, plexiglass screen, and monitor. I winded up lifting some of the paint I had used to paint the table (the paint was really sticking badly to the surface). This lead me to question the surface of the plexiglass and figured I’d polish the plexiglass. I originally made the bad choice of trying to apply an old plastic modelling technique on the plexiglass, washing it with a layer of future floor polish. This looked absolutely horrible on this big surface so I winded up spending 1,5-2 hours removing the stuff again and then using some proper polishing compounds on both sides of the table making the plexiglass sheet incredibly nice looking (in my humble opinion). I Repainted the parts where the paint was removed, took out the screen, rotated it 180 degrees, re-fitted all the power adapters etc so it wouldn’t be in the way of the monitor and had to saw up a second hole for the DVI connector… I then reinstalled plexiglass, buttons, joysticks, etc… and now, a much nicer viewing angle of the monitor and a nicer looking plexiglass sheet, but paint job not as nice anymore. Shit happens. Oh, I also pulled a cable through from the screen to the front panel button so I can turn on/off the monitor from one of the buttons. The USB hub was glued into a hole made in the skirting so it sticks out underneath the table with two accessible USB ports.</p> 891<p>After everything was fitted and tested to work I started to look at the backside what could be done about it… I had to make a raised area to increase the depth of the table as the buttons I got wont fit properly otherwise. I used a 1 cm floor skirting around the hole and then took the sheet from the monitor hole and sawed into two pieces which fits over the hole, drilled a lot of holes in it to at least create some air ventilation into the table.</p> 892<p>At this point I’ve installed some games, used it for a bit, let the kids play around and I’
892m absolutely happy with it. The software side I didn’t need to do anything about, it worked more or less out of the box. I had to make a usb quirks hack to split the controller into two halves, I had to rotate the screen in the config.txt and that’s it, then just follow the installation howtos. Retropie was a really happy surprise, I wasn’t expecting things to be that smooth to install. I do wish the Amiga emulator was better integrate, it would be nice to be able to do the same thing as with the NES images, just drop them in and they work… but I understand that each game needs its own “fixes” to get up and running… I will have a look and see if it’s possible to improve the situation somehow, at least so I can start games with just the joysticks and buttons.</p> 893<p><style id="bwg-style-0"> #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails { width: 1004px; justify-content: center; margin:0 auto !important; background-color: rgba(255, 255, 255, 0.00); padding-left: 4px; padding-top: 4px; max-width: 100%; } #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-item { justify-content: flex-start; max-width: 200px; width: 200px !important; } #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-item a { margin-right: 4px; margin-bottom: 4px; } #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-item0 { padding: 0px; background-color:rgba(255,255,255, 0.30); border: 0px none #CCCCCC; opacity: 1.00; border-radius: 0; box-shadow: 0px 0px 0px #888888; } #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-item1 img { max-height: none; max-width: none; padding: 0 !important; } @media only screen and (min-width: 480px) { #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-item0 { transition: all 0.3s ease 0s;-webkit-transition: all 0.3s ease 0s; } #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-item0:hover { -ms-transform: scale(1.1); -webkit-transform: scale(1.1); transform: scale(1.1); } } #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-item1 { padding-top: 50%; } #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-title2, #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-ecommerce2 { color: #CCCCCC; font-family: segoe ui; font-size: 16px; font-weight: bold; padding: 2px; text-shadow: 0px 0px 0px #888888; max-height: 100%; } #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-thumb-description span { color: #323A45; font-family: Ubuntu; font-size: 12px; max-height: 100%; word-wrap: break-word; } #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-play-icon2 { font-size: 32px; } #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-ecommerce2 { font-size: 19.2px; color: #CCCCCC; } </style> <div id="bwg_container1_0" class="bwg_container bwg_thumbnail bwg_thumbnails " data-right-click-protection="0" data-bwg="0" data-scroll="0" data-gallery-type="thumbnails" data-gallery-view-type="thumbnails" data-current-url="/" data-lightbox-url="https://www.frozentux.net/wp-admin/admin-ajax.php?action=GalleryBox&current_view=0&gallery_id=2&tag=0&theme_id=1&shortcode_id=2&sort_by=order&order_by=desc&current_url=%2F" data-gallery-id="2" data-popup-width="800" data-popup-height="500" data-is-album="gallery" data-buttons-position="bottom"> <div id="bwg_container2_0"> <div id="ajax_loading_0" class="bwg_loading_div_1"> <div class="bwg_loading_div_2"> <div class="bwg_loading_div_3"> <div id="loading_div_0" class="bwg_spider_ajax_loading"> </div> </div> </div> </div> <form id="gal_front_form_0" class="bwg-hidden" method="post" action="#" data-current="0" data-shortcode-id="2" data-gallery-type="thumbnails" data-gallery-id="2" data-tag="
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893 </p> 894<div class="sharedaddy sd-sharing-enabled"><div class="robots-nocontent sd-block sd-social sd-social-icon sd-sharing"><h3 class="sd-title">Share this:</h3><div class="sd-content"><ul><li class="share-email"><a rel="nofollow noopener noreferrer" 895 data-shared="sharing-email-960" 896 class="share-email sd-button share-icon no-text" 897 href="mailto:?subject=%5BShared%20Post%5D%20Retropie%20table%20writeup&body=https%3A%2F%2Fwww.frozentux.net%2F2016%2F05%2Fretropie-table-writeup%2F&share=email" 898 target="_blank" 899 aria-labelledby="sharing-email-960" 900 data-email-share-error-title="Do you have email set up?" data-email-share-error-text="If you're having problems sharing via email, you might not have email set up for your browser. You may need to create a new email yourself." data-email-share-nonce="96314e1d56" data-email-share-track-url="https://www.frozentux.net/2016/05/retropie-table-writeup/?share=email"> 901 <span id="sharing-email-960" hidden>Email a link to a friend (Opens in new window)</span> 902 <span>Email</span> 903 </a></li><li class="share-facebook"><a rel="nofollow noopener noreferrer" 904 data-shared="sharing-facebook-960" 905 class="share-facebook sd-button share-icon no-text" 906 href="https://www.frozentux.net/2016/05/retropie-table-writeup/?share=facebook" 907 target="_blank" 908 aria-labelledby="sharing-facebook-960" 909 > 910 <span id="sharing-facebook-960" hidden>Share on Facebook (Opens in new window)</span> 911 <span>Facebook</span> 912 </a></li><li class="share-linkedin"><a rel="nofollow noopener noreferrer" 913 data-shared="sharing-linkedin-960" 914 class="share-linkedin sd-button share-icon no-text" 915 href="https://www.frozentux.net/2016/05/retropie-table-writeup/?share=linkedin" 916 target="_blank" 917 aria-labelledby="sharing-linkedin-960" 918 > 919 <span id="sharing-linkedin-960" hidden>Share on LinkedIn (Opens in new window)</span> 920 <span>LinkedIn</span> 921 </a></li><li class="share-reddit"><a rel="nofollow noopener noreferrer" 922 data-shared="sharing-reddit-960" 923 class="share-reddit sd-button share-icon no-text" 924 href="https://www.frozentux.net/2016/05/retropie-table-writeup/?share=reddit" 925 target="_blank" 926 aria-labelledby="sharing-reddit-960" 927 > 928 <span id="sharing-reddit-960" hidden>Share on Reddit (Opens in new window)</span> 929 <span>Reddit</span> 930 </a></li><li class="share-twitter"><a rel="nofollow noopener noreferrer" 931 data-shared="sharing-twitter-960" 932 class="share-twitter sd-button share-icon no-text" 933 href="https://www.frozentux.net/2016/05/retropie-table-writeup/?share=twitter" 934 target="_blank" 935 aria-labelledby="sharing-twitter-960" 936 > 937 <span id="sharing-twitter-960" hidden>Share on X (Opens in new window)</span> 938 <span>X</span> 939 </a></li><li class="share-end"></li></ul></div></div></div><div style="clear:both;"></div> 940 941 <div class="postmeta"> 942 <p>Tags: <a href="https://www.frozentux.net/tag/arcade/" rel="tag">arcade</a>, <a href="https://www.frozentux.net/tag/ikea-lack/" rel="tag">ikea lack</a>, <a href="https://www.frozentux.net/tag/lack/" rel="tag">lack</a>, <a href="https://www.frozentux.net/tag/retropie/" rel="tag">retropie</a>, <a href="https://www.frozentux.net/tag/table/" rel="tag">table</a> </p> 943 </div> 944 945 946 <h1><a href="https://www.frozentux.net/2016/03/replacing-network-switches-can-be-a-pain-sometimes/" rel="bookmark">Replacing network switches can be a pain sometimes</a></h1> 947 948 <div class="date"> 949 March 25, 2016 by <a href="https://www.frozentux.net/author/admin/" rel="author">Oscar Andreasson</a> · <a href="https://www.frozentux.net/2016/03/replacing-network-switches-can-be-a-pain-sometimes/#respond">Leave a Comment</a><br />Filed under: <a href="https://www.frozentux.net/category/communications/" rel="category tag">Communications</a>, <a href="https://www.frozentux.net/category/personal/" rel="category tag">Personal</a> 950 </div> 951 952 <p>One of those days when replacing 2 routers being used as switches should be so simple bit turn out so complicated. I completely forgot I’m using one of them as a “firewall” between a dmz and the rest of the network. Figured I’d just switch the IP on the comhem router and it would work for now at least, but no, it refused to because guest network is hardwired in the router to the same range as my internal network, and hence impossible to use…
952 Winded up reconfiguring everything on my network to a different IP range, spending a couple of hours doing so, and once I’m done, switch IP on the comhem router and reboot it… And get a 10/8 IP address on the Internet side interface… Wtf? I call the tech support and apparently this has been so for at least 3 years. Sometimes you get a private network IP on the Internet, sometimes not, and there is nothing you or they can do about it. I went home and rebooted the router, and got an 83/8 IP instead this time. So… Something I planned to take 10 minutes winded up taking 5-6 hours… Hurray… I just wish we could start being sane and also that certain network providers would start implementing IPv6.</p> 953<div class="sharedaddy sd-sharing-enabled"><div class="robots-nocontent sd-block sd-social sd-social-icon sd-sharing"><h3 class="sd-title">Share this:</h3><div class="sd-content"><ul><li class="share-email"><a rel="nofollow noopener noreferrer" 954 data-shared="sharing-email-954" 955 class="share-email sd-button share-icon no-text" 956 href="mailto:?subject=%5BShared%20Post%5D%20Replacing%20network%20switches%20can%20be%20a%20pain%20sometimes&body=https%3A%2F%2Fwww.frozentux.net%2F2016%2F03%2Freplacing-network-switches-can-be-a-pain-sometimes%2F&share=email" 957 target="_blank" 958 aria-labelledby="sharing-email-954" 959 data-email-share-error-title="Do you have email set up?" data-email-share-error-text="If you're having problems sharing via email, you might not have email set up for your browser. 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A lot of good speeches and stuff to talk about and I feel very motivated for some new projects. Some of the stuff going on right now is incredibly exciting, especially with regards to containerization etc which is something I have a lot of personal and work related interest in. I will be looking into more details in that for the future…</p> 1012<p>What I did miss was a more “general networking” track with low level stuff like iptables, netfilter, iproute, wireshark, snort, etc. I’m just not sure if this is the right conference for that though. Gathering my thoughts and working out some of the project details in the upcoming week if I get time.</p> 1013<div class="sharedaddy sd-sharing-enabled"><div class="robots-nocontent sd-block sd-social sd-social-icon sd-sharing"><h3 class="sd-title">Share this:</h3><div class="sd-content"><ul><li class="share-email"><a rel="nofollow noopener noreferrer" 1014 data-shared="sharing-email-950" 1015 class="share-email sd-button share-icon no-text" 1016 href="mailto:?subject=%5BShared%20Post%5D%20FOSDEM%202016%20is%20over&body=https%3A%2F%2Fwww.frozentux.net%2F2016%2F02%2Ffosdem-2016-is-over%2F&share=email" 1017 target="_blank" 1018 aria-labelledby="sharing-email-950"
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