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98 lines
4.8 KiB
XML
98 lines
4.8 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-taskserver">
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<title>Taskserver</title>
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<para>
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Taskserver is the server component of <link xlink:href="https://taskwarrior.org/">Taskwarrior</link>, a free and open source todo list application.
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</para>
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<para>
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<emphasis>Upstream documentation:</emphasis> <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, so you either need to roll your own CA or purchase a certificate from a known CA, which allows creation of client certificates. These certificates 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 called <command>nixos-taskserver</command> which manages the custom CA along 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 is allowed to connect, every user has its own UUID which identifies it as an 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 along with the UUID of the user, so it handles all of the credentials needed 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 imperatively, the <command>nixos-taskserver</command> tool is used for addition and deletion of organisations along with users and groups defined by <xref linkend="opt-services.taskserver.organisations"/> and as well for 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 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 org add foo</command>, the organisation is not modified and deleted no matter what you define in <option>services.taskserver.organisations</option>, even if you're adding 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> command, documentation for each subcommand can be shown by using the <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, however in order to set up a Taskwarrior client for synchronisation with a Taskserver instance, you have to transfer the keys and certificates to the 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 $username</command> which is printing a shell script fragment to stdout which can either be used verbatim or adjusted to import the user on the client machine.
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</para>
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<para>
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For example, let's say you have the following configuration:
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<screen>
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{
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<xref linkend="opt-services.taskserver.enable"/> = true;
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<xref linkend="opt-services.taskserver.fqdn"/> = "server";
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<xref linkend="opt-services.taskserver.listenHost"/> = "::";
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<link linkend="opt-services.taskserver.organisations._name_.users">services.taskserver.organisations.my-company.users</link> = [ "alice" ];
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}
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</screen>
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This creates an organisation called <literal>my-company</literal> with the user <literal>alice</literal>.
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</para>
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<para>
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Now in order to import the <literal>alice</literal> user to another machine <literal>alicebox</literal>, all we need to do is something like this:
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<screen>
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<prompt>$ </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 & 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 your tasks for the first time with <command>task sync init</command> on <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 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 <link linkend="opt-services.taskserver.pki.manual.ca.cert">service.taskserver.pki.manual</link>.*, <command>nixos-taskserver</command> won't issue certificates, but you can 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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