From fe27af7a16d9bc56b0767f63d8f0490fcd2f13d1 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Thu, 22 Dec 2022 17:56:58 +0100
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+title = "MàJ Matrix"
+description = "Mise à jour de Matrix (Synapse/Element)"
+date = 2022-12-22
+dateCreated = 2022-12-22
+weight = 11
++++
+
+How to update Matrix?
+=====================
+
+## 1. Build the new containers
+
+Often, I update Riot Web and Synapse at the same time.
+
+
+* Open `app/docker-compose.yml` and locate `riot` (the Element Web service) and `synapse` (the Matrix Synapse server). There are two things you need to do for each service:
+
+    * Set the `VERSION` argument to the target service version (e.g. `1.26.0` for Synapse). This argument is then used to template the Dockerfile. 
+
+    The `VERSION` value should match a github release, the link to the corresponding release page is put as a comment next to the variable in the compose file;
+
+    * Tag the image with a new incremented version tag. For example: `superboum/amd64_riotweb:v17` will become `superboum/amd64_riotweb:v18`.
+
+    We use the docker hub to store our images. So, if you are not `superboum` you must change the name with your own handle, eg. `john/amd64_riotweb:v18`. This requires that you registered an account (named `john`) on https://hub.docker.com.
+
+
+So, from now we expect you have:
+
+* changed the `VERSION` value and `image` name/tag of `riot`
+* changed the `VERSION` value and `image` name/tag of `synapse`
+
+From the `/app` folder, you can now simply build and push the new images:
+
+```bash
+docker-compose build riot synapse
+```
+
+And then send them to the docker hub:
+
+```
+docker-compose push riot synapse
+```
+
+Don't forget to commit and push your changes before doing anything else!
+
+## 2. Deploy the new containers
+
+Now, we will edit the deployment file `app/im/deploy/im.hcl`.
+
+Find where the image is defined in the file, for example Element-web will look like that:
+
+
+```hcl
+  group "riotweb" {
+    count = 1
+
+    task "server" {
+      driver = "docker"
+      config {
+        image = "superboum/amd64_riotweb:v17"
+        port_map {
+          web_port = 8043
+        }
+```
+
+And replace the `image =` entry with its new version created above.
+Do the same thing for the `synapse` service.
+
+Now, you need a way to access the cluster to deploy this file.
+To do this, you must bind nomad on your machine through a SSH tunnel.
+Check the end of [the parent `README.md`](../README.md) to do it.
+If you have access to the Nomad web UI when entering http://127.0.0.1:4646
+you are ready to go.
+
+You must have installed the Nomad command line tool on your machine (also explained in [the parent `README.md`](../README.md)).
+
+Now, on your machine and from the `app/im/deploy` folder, you must be able to run:
+
+```
+nomad plan im.hcl
+```
+
+Check that the proposed diff corresponds to what you have in mind.
+If it seems OK, just copy paste the `nomad job run ... im.hcl` command proposed as part of the output of the `nomad plan` command.
+
+From now, it will take around ~2 minutes to deploy the new images.
+You can follow the deployment from the Nomad UI.
+Bear in mind that, once the deployment is done on Nomad, you may still need to wait some minutes that Traefik refreshes its configuration.
+
+If everythings worked as intended, you can commit and push your deployment file.
+
+If something went wrong, you must rollback your deployment.
+
+  1. First, find a working deployment with [nomad job history](https://www.nomadproject.io/docs/commands/job/history)
+  2. Revert to this deployment with [nomad job revert](https://www.nomadproject.io/docs/commands/job/revert)
+
+Now, if the deployment failed, you should probably investigate what went wrong offline.
+I built a test stack with docker-compose in `app/<service>/integration` that should help you out (for now, test suites are only written for plume and jitsi).
+
+
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