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Code Issues Releases Wiki Activity

Improve traefik recipe

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David Young
2018-09-17 20:40:32 +12:00
parent 2a18f94bc0
commit 1bb9f3813c
1 changed files with 14 additions and 5 deletions
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19
manuscript/ha-docker-swarm/traefik.md
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@@ -21,6 +21,9 @@ To deal with these gaps, we need a front-end load-balancer, and in this design,
The traefik container is aware of the __other__ docker containers in the swarm, because it has access to the docker socket at **/var/run/docker.sock**. This allows traefik to dynamically configure itself based on the labels found on containers in the swarm, which is hugely useful. To make this functionality work on our SELinux-enabled Atomic hosts, we need to add custom SELinux policy.
!!! tip
The following is only necessary if you're using SELinux!
Run the following to build and activate policy to permit containers to access docker.sock:
```
@@ -37,7 +40,7 @@ make && semodule -i dockersock.pp
While it's possible to configure traefik via docker command arguments, I prefer to create a config file (traefik.toml). This allows me to change traefik's behaviour by simply changing the file, and keeps my docker config simple.
Create /var/data/traefik/traefik.toml as follows:
Create ```/var/data/traefik/```, and then create ```traefik.toml``` inside it as follows:
```
checkNewVersion = true
@@ -76,9 +79,14 @@ watch = true
swarmmode = true
```
### Prepare the docker service config
Create /var/data/traefik/docker-compose.yml as follows:
!!! tip
I share (_with my [patreon patrons](https://www.patreon.com/funkypenguin)_) a private "_premix_" git repository, which includes necessary docker-compose and env files for all published recipes. This means that patrons can launch any recipe with just a ```git pull``` and a ```docker stack deploy``` 👍
Create /var/data/config/traefik/docker-compose.yml as follows:
```
version: "3"
@@ -123,13 +131,14 @@ networks:
- subnet: 10.1.0.0/24
```
Docker won't start an image with a bind-mount to a non-existent file, so prepare acme.json (_with the appropriate permissions_) by running:
Docker won't start an image with a bind-mount to a non-existent file, so prepare an empty acme.json (_with the appropriate permissions_) by running:
```
touch /var/data/traefik/acme.json
chmod 600 /var/data/traefik/acme.json
```.
```
Traefik will populate acme.json itself when it runs, but it needs to exist before the container will start (_Chicken, meet egg._)
### Launch