Creating a NixOS live CD: Difference between revisions
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== Motivation == | == Motivation == | ||
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Creating a modified NixOS LiveCD out of an existing working NixOS installation has a number of benefits: | Creating a modified NixOS LiveCD out of an existing working NixOS installation has a number of benefits: | ||
* Ensures authenticity. | * Ensures authenticity. | ||
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== Building == | == Building == | ||
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Building minimal NixOS installation CD with the <code>nix-build</code> command by creating this <code>iso.nix</code>-file. In this example with [[Neovim]] preinstalled. | Building minimal NixOS installation CD with the <code>nix-build</code> command by creating this <code>iso.nix</code>-file. In this example with [[Neovim]] preinstalled. | ||
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=== Testing the image === <!--T:7--> | === Testing the image === <!--T:7--> | ||
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To inspect the contents of the ISO image: | To inspect the contents of the ISO image: | ||
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===SSH=== | ===SSH=== | ||
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In your <tt>iso.nix</tt>: | In your <tt>iso.nix</tt>: | ||
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===Static IP Address=== <!--T:11--> | ===Static IP Address=== <!--T:11--> | ||
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Static IP addresses can be set in the image itself. This can be useful for VPS installation. | Static IP addresses can be set in the image itself. This can be useful for VPS installation. | ||
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=== Building faster === | === Building faster === | ||
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The build process is slow because of compression. | The build process is slow because of compression. | ||
Here are some timings for <code>nix-build</code>: | Here are some timings for <code>nix-build</code>: | ||
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{| class="wikitable" style="margin:auto" | {| class="wikitable" style="margin:auto" | ||
|+ Compression results | |+ Compression results | ||
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| <code>xz -Xdict-size 100%</code> (default) || 450s || 43% | | <code>xz -Xdict-size 100%</code> (default) || 450s || 43% | ||
|} | |} | ||
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See also: [https://gist.github.com/baryluk/70a99b5f26df4671378dd05afef97fce mksquashfs benchmarks] | See also: [https://gist.github.com/baryluk/70a99b5f26df4671378dd05afef97fce mksquashfs benchmarks] | ||
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==See also== | ==See also== | ||
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* [https://nixos.org/manual/nixos/stable/index.html#sec-building-image NixOS Manual: Building a NixOS (Live) ISO]. | * [https://nixos.org/manual/nixos/stable/index.html#sec-building-image NixOS Manual: Building a NixOS (Live) ISO]. | ||
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