135 lines
4.9 KiB
XML
135 lines
4.9 KiB
XML
<chapter xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0"
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xml:id="module-services-taskserver">
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<title>Taskserver</title>
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<para>
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Taskserver is the server component of
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<link xlink:href="https://taskwarrior.org/">Taskwarrior</link>, a free and
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open source todo list application.
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</para>
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<para>
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<emphasis>Upstream documentation:</emphasis>
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<link xlink:href="https://taskwarrior.org/docs/#taskd"/>
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</para>
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<section xml:id="module-services-taskserver-configuration">
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<title>Configuration</title>
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<para>
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Taskserver does all of its authentication via TLS using client certificates,
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so you either need to roll your own CA or purchase a certificate from a
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known CA, which allows creation of client certificates. These certificates
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are usually advertised as <quote>server certificates</quote>.
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</para>
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<para>
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So in order to make it easier to handle your own CA, there is a helper tool
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called <command>nixos-taskserver</command> which manages the custom CA along
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with Taskserver organisations, users and groups.
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</para>
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<para>
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While the client certificates in Taskserver only authenticate whether a user
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is allowed to connect, every user has its own UUID which identifies it as an
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entity.
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</para>
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<para>
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With <command>nixos-taskserver</command> the client certificate is created
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along with the UUID of the user, so it handles all of the credentials needed
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in order to setup the Taskwarrior client to work with a Taskserver.
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</para>
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</section>
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<section xml:id="module-services-taskserver-nixos-taskserver-tool">
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<title>The nixos-taskserver tool</title>
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<para>
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Because Taskserver by default only provides scripts to setup users
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imperatively, the <command>nixos-taskserver</command> tool is used for
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addition and deletion of organisations along with users and groups defined
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by <xref linkend="opt-services.taskserver.organisations"/> and as well for
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imperative set up.
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</para>
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<para>
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The tool is designed to not interfere if the command is used to manually set
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up some organisations, users or groups.
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</para>
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<para>
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For example if you add a new organisation using <command>nixos-taskserver
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org add foo</command>, the organisation is not modified and deleted no
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matter what you define in
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<option>services.taskserver.organisations</option>, even if you're adding
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the same organisation in that option.
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</para>
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<para>
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The tool is modelled to imitate the official <command>taskd</command>
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command, documentation for each subcommand can be shown by using the
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<option>--help</option> switch.
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</para>
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</section>
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<section xml:id="module-services-taskserver-declarative-ca-management">
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<title>Declarative/automatic CA management</title>
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<para>
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Everything is done according to what you specify in the module options,
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however in order to set up a Taskwarrior client for synchronisation with a
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Taskserver instance, you have to transfer the keys and certificates to the
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client machine.
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</para>
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<para>
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This is done using <command>nixos-taskserver user export $orgname
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$username</command> which is printing a shell script fragment to stdout
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which can either be used verbatim or adjusted to import the user on the
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client machine.
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</para>
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<para>
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For example, let's say you have the following configuration:
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<screen>
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{
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<xref linkend="opt-services.taskserver.enable"/> = true;
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<xref linkend="opt-services.taskserver.fqdn"/> = "server";
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<xref linkend="opt-services.taskserver.listenHost"/> = "::";
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<link linkend="opt-services.taskserver.organisations._name_.users">services.taskserver.organisations.my-company.users</link> = [ "alice" ];
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}
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</screen>
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This creates an organisation called <literal>my-company</literal> with the
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user <literal>alice</literal>.
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</para>
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<para>
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Now in order to import the <literal>alice</literal> user to another machine
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<literal>alicebox</literal>, all we need to do is something like this:
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<screen>
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<prompt>$ </prompt>ssh server nixos-taskserver user export my-company alice | sh
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</screen>
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Of course, if no SSH daemon is available on the server you can also copy
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& paste it directly into a shell.
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</para>
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<para>
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After this step the user should be set up and you can start synchronising
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your tasks for the first time with <command>task sync init</command> on
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<literal>alicebox</literal>.
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</para>
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<para>
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Subsequent synchronisation requests merely require the command <command>task
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sync</command> after that stage.
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</para>
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</section>
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<section xml:id="module-services-taskserver-manual-ca-management">
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<title>Manual CA management</title>
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<para>
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If you set any options within
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<link linkend="opt-services.taskserver.pki.manual.ca.cert">service.taskserver.pki.manual</link>.*,
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<command>nixos-taskserver</command> won't issue certificates, but you can
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still use it for adding or removing user accounts.
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</para>
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</section>
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</chapter>
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