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https://github.com/SebastianWendel/nixpkgs.git
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63 lines
2.5 KiB
XML
63 lines
2.5 KiB
XML
<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xml:id="sec-pkgs-ociTools">
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<title>pkgs.ociTools</title>
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<para>
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<varname>pkgs.ociTools</varname> is a set of functions for creating containers according to the <link xlink:href="https://github.com/opencontainers/runtime-spec">OCI container specification v1.0.0</link>. Beyond that it makes no assumptions about the container runner you choose to use to run the created container.
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</para>
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<section xml:id="ssec-pkgs-ociTools-buildContainer">
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<title>buildContainer</title>
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<para>
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This function creates a simple OCI container that runs a single command inside of it. An OCI container consists of a <varname>config.json</varname> and a rootfs directory.The nix store of the container will contain all referenced dependencies of the given command.
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</para>
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<para>
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The parameters of <varname>buildContainer</varname> with an example value are described below:
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</para>
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<example xml:id='ex-ociTools-buildContainer'>
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<title>Build Container</title>
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<programlisting>
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buildContainer {
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args = [ (with pkgs; writeScript "run.sh" ''
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#!${bash}/bin/bash
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${coreutils}/bin/exec ${bash}/bin/bash
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'').outPath ]; <co xml:id='ex-ociTools-buildContainer-1' />
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mounts = {
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"/data" = {
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type = "none";
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source = "/var/lib/mydata";
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options = [ "bind" ];
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};
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};<co xml:id='ex-ociTools-buildContainer-2' />
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readonly = false; <co xml:id='ex-ociTools-buildContainer-3' />
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}
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</programlisting>
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<calloutlist>
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<callout arearefs='ex-ociTools-buildContainer-1'>
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<para>
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<varname>args</varname> specifies a set of arguments to run inside the container. This is the only required argument for <varname>buildContainer</varname>. All referenced packages inside the derivation will be made available inside the container
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</para>
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</callout>
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<callout arearefs='ex-ociTools-buildContainer-2'>
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<para>
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<varname>mounts</varname> specifies additional mount points chosen by the user. By default only a minimal set of necessary filesystems are mounted into the container (e.g procfs, cgroupfs)
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</para>
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</callout>
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<callout arearefs='ex-ociTools-buildContainer-3'>
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<para>
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<varname>readonly</varname> makes the container's rootfs read-only if it is set to true. The default value is false <literal>false</literal>.
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</para>
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</callout>
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</calloutlist>
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</example>
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</section>
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</section>
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