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102 lines
4.2 KiB
Markdown
102 lines
4.2 KiB
Markdown
# Taskserver {#module-services-taskserver}
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Taskserver is the server component of the now deprecated version 2 of
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[Taskwarrior](https://taskwarrior.org/), a free and
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open source todo list application.
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[Taskwarrior 3.0.0 was released in March
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2024](https://github.com/GothenburgBitFactory/taskwarrior/releases/tag/v3.0.0),
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and the sync functionality was rewritten entirely. With it, a NixOS module
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named
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[`taskchampion-sync-server`](options.html#opt-services.taskchampion-sync-server.enable)
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was added to Nixpkgs. Many people still want to use the old [Taskwarrior
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2.6.x](https://github.com/GothenburgBitFactory/taskwarrior/releases/tag/v2.6.2),
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and Taskserver along with it. Hence this module and this documentation will
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stay here for the near future.
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## Configuration {#module-services-taskserver-configuration}
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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 "server certificates".
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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` which manages the custom CA along
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with Taskserver organisations, users and groups.
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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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With {command}`nixos-taskserver` 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 2 client to work with a Taskserver.
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## The nixos-taskserver tool {#module-services-taskserver-nixos-taskserver-tool}
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Because Taskserver by default only provides scripts to setup users
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imperatively, the {command}`nixos-taskserver` tool is used for
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addition and deletion of organisations along with users and groups defined
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by [](#opt-services.taskserver.organisations) and as well for
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imperative set up.
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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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For example if you add a new organisation using {command}`nixos-taskserver
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org add foo`, 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`, even if you're adding
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the same organisation in that option.
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The tool is modelled to imitate the official {command}`taskd`
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command, documentation for each subcommand can be shown by using the
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{option}`--help` switch.
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## Declarative/automatic CA management {#module-services-taskserver-declarative-ca-management}
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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 2 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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This is done using {command}`nixos-taskserver user export $orgname
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$username` 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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For example, let's say you have the following configuration:
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```ShellSession
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{
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services.taskserver.enable = true;
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services.taskserver.fqdn = "server";
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services.taskserver.listenHost = "::";
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services.taskserver.organisations.my-company.users = [ "alice" ];
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}
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```
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This creates an organisation called `my-company` with the
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user `alice`.
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Now in order to import the `alice` user to another machine
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`alicebox`, all we need to do is something like this:
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```ShellSession
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$ ssh server nixos-taskserver user export my-company alice | sh
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```
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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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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` on
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`alicebox`.
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Subsequent synchronisation requests merely require the command {command}`task
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sync` after that stage.
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## Manual CA management {#module-services-taskserver-manual-ca-management}
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If you set any options within
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[service.taskserver.pki.manual](#opt-services.taskserver.pki.manual.ca.cert).*,
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{command}`nixos-taskserver` won't issue certificates, but you can
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still use it for adding or removing user accounts.
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