fe4c2d73f4
Tests were carried out like this: - `virtualenv3 env` - `./env/bin/pip install ansible==4.10.0 ansible-core==2.11.7` - `./env/bin/ansible-playbook .....` The lowest version of `ansible-core` available on PyPI right now is 2.11.0. That version has trouble with `ansible==4.0.0` though. The errors we were hitting seemed to be resolved by others online by using `ansible==4.10.0` instead, which has a minimum `ansible-core` requirement of `2.11.7`, so that's what we went with. Older versions of Ansible may work, but.. I'm having trouble installing them and don't want to spend too much time on digging through ancient versions and testing them out. People should just learn to run up-to-date software.
122 lines
7 KiB
Markdown
122 lines
7 KiB
Markdown
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# Running this playbook
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This playbook is meant to be run using [Ansible](https://www.ansible.com/).
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Ansible typically runs on your local computer and carries out tasks on a remote server.
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If your local computer cannot run Ansible, you can also run Ansible on some server somewhere (including the server you wish to install to).
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## Supported Ansible versions
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To manually check which version of Ansible you're on, run: `ansible --version`.
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For the **best experience**, we recommend getting the **latest version of Ansible available**.
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We're not sure what's the minimum version of Ansible that can run this playbook successfully.
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The lowest version that we've confirmed (on 2022-11-26) to be working fine is: `ansible-core` (`2.11.7`) combined with `ansible` (`4.10.0`).
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If your distro ships with an Ansible version older than this, you may run into issues. Consider [Upgrading Ansible](#upgrading-ansible) or [using Ansible via Docker](#using-ansible-via-docker).
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## Upgrading Ansible
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Depending on your distribution, you may be able to upgrade Ansible in a few different ways:
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- by using an additional repository (PPA, etc.), which provides newer Ansible versions. See instructions for [CentOS](https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html#installing-ansible-on-rhel-centos-or-fedora), [Debian](https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html#installing-ansible-on-debian), or [Ubuntu](https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html#installing-ansible-on-ubuntu) on the Ansible website.
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- by removing the Ansible package (`yum remove ansible` or `apt-get remove ansible`) and installing via [pip](https://pip.pypa.io/en/stable/installation/) (`pip install ansible`).
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If using the `pip` method, do note that the `ansible-playbook` binary may not be on the `$PATH` (https://linuxconfig.org/linux-path-environment-variable), but in some more special location like `/usr/local/bin/ansible-playbook`. You may need to invoke it using the full path.
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**Note**: Both of the above methods are a bad way to run system software such as Ansible.
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If you find yourself needing to resort to such hacks, please consider reporting a bug to your distribution and/or switching to a sane distribution, which provides up-to-date software.
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## Using Ansible via Docker
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Alternatively, you can run Ansible inside a Docker container (powered by the [devture/ansible](https://hub.docker.com/r/devture/ansible/) Docker image).
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This ensures that you're using a very recent Ansible version, which is less likely to be incompatible with the playbook.
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You can either [run Ansible in a container on the Matrix server itself](#running-ansible-in-a-container-on-the-matrix-server-itself) or [run Ansible in a container on another computer (not the Matrix server)](#running-ansible-in-a-container-on-another-computer-not-the-matrix-server).
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### Running Ansible in a container on the Matrix server itself
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To run Ansible in a (Docker) container on the Matrix server itself, you need to have a working Docker installation.
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Docker is normally installed by the playbook, so this may be a bit of a chicken and egg problem. To solve it:
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- you **either** need to install Docker manually first. Follow [the upstream instructions](https://docs.docker.com/engine/install/) for your distribution and consider setting `matrix_playbook_docker_installation_enabled: false` in your `vars.yml` file, to prevent the playbook from installing Docker
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- **or** you need to run the playbook in another way (e.g. [Running Ansible in a container on another computer (not the Matrix server)](#running-ansible-in-a-container-on-another-computer-not-the-matrix-server)) at least the first time around
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Once you have a working Docker installation on the server, **clone the playbook** somewhere on the server and configure it as per usual (`inventory/hosts`, `inventory/host_vars/..`, etc.), as described in [configuring the playbook](configuring-playbook.md).
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You would then need to add `ansible_connection=community.docker.nsenter` to the host line in `inventory/hosts`. This tells Ansible to connect to the "remote" machine by switching Linux namespaces with [nsenter](https://man7.org/linux/man-pages/man1/nsenter.1.html), instead of using SSH.
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Alternatively, you can leave your `inventory/hosts` as is and specify the connection type in **each** `ansible-playbook` call you do later, like this: `ansible-playbook --connection=community.docker.nsenter ...`
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Run this from the playbook's directory:
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```bash
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docker run -it --rm \
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--privileged \
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--pid=host \
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-w /work \
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-v `pwd`:/work \
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--entrypoint=/bin/sh \
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docker.io/devture/ansible:2.13.6-r0
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```
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Once you execute the above command, you'll be dropped into a `/work` directory inside a Docker container.
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The `/work` directory contains the playbook's code.
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First, consider running `git config --global --add safe.directory /work` to [resolve directory ownership issues](#resolve-directory-ownership-issues).
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Finally, you can execute `ansible-playbook ...` (or `ansible-playbook --connection=community.docker.nsenter ...`) commands as per normal now.
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### Running Ansible in a container on another computer (not the Matrix server)
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Run this from the playbook's directory:
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```bash
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docker run -it --rm \
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-w /work \
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-v `pwd`:/work \
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-v $HOME/.ssh/id_rsa:/root/.ssh/id_rsa:ro \
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--entrypoint=/bin/sh \
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docker.io/devture/ansible:2.13.6-r0
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```
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The above command tries to mount an SSH key (`$HOME/.ssh/id_rsa`) into the container (at `/root/.ssh/id_rsa`).
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If your SSH key is at a different path (not in `$HOME/.ssh/id_rsa`), adjust that part.
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Once you execute the above command, you'll be dropped into a `/work` directory inside a Docker container.
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The `/work` directory contains the playbook's code.
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First, consider running `git config --global --add safe.directory /work` to [resolve directory ownership issues](#resolve-directory-ownership-issues).
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Finally, you execute `ansible-playbook ...` commands as per normal now.
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#### If you don't use SSH keys for authentication
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If you don't use SSH keys for authentication, simply remove that whole line (`-v $HOME/.ssh/id_rsa:/root/.ssh/id_rsa:ro`).
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To authenticate at your server using a password, you need to add a package. So, when you are in the shell of the ansible docker container (the previously used `docker run -it ...` command), run:
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```bash
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apk add sshpass
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```
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Then, to be asked for the password whenever running an `ansible-playbook` command add `--ask-pass` to the arguments of the command.
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#### Resolve directory ownership issues
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Because you're `root` in the container running Ansible and this likely differs fom the owner (your regular user account) of the playbook directory outside of the container, certain playbook features which use `git` locally may report warnings such as:
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> fatal: unsafe repository ('/work' is owned by someone else)
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> To add an exception for this directory, call:
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> git config --global --add safe.directory /work
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These errors can be resolved by making `git` trust the playbook directory by running `git config --global --add safe.directory /work`
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