mirror of
https://github.com/woodpecker-ci/woodpecker.git
synced 2024-12-12 08:23:48 +02:00
84 lines
2.7 KiB
Markdown
84 lines
2.7 KiB
Markdown
|
Drone is configured to connect to the local Docker daemon. Drone will attempt to use the `DOCKER_HOST` environment variable to determine the daemon URL. If not set, Drone will attempt to use the default socket connection `unix:///var/run/docker.sock`.
|
||
|
|
|
||
|
|
You can modify the Docker daemon URL in the Drone configuration file:
|
||
|
|
|
||
|
|
```ini
|
||
|
|
[docker]
|
||
|
|
nodes=[
|
||
|
|
"unix:///var/run/docker.sock",
|
||
|
|
"unix:///var/run/docker.sock"
|
||
|
|
]
|
||
|
|
```
|
||
|
|
|
||
|
|
### Concurrency
|
||
|
|
|
||
|
|
Each node is capable of processing a single build. Therefore, the below configuration will only execute one build at a time:
|
||
|
|
|
||
|
|
```ini
|
||
|
|
[docker]
|
||
|
|
nodes=[
|
||
|
|
"unix:///var/run/docker.sock"
|
||
|
|
]
|
||
|
|
```
|
||
|
|
|
||
|
|
In order to increase concurrency you can increase the number of nodes. The below configuration is capable of processing four builds at a time, all using the local Docker daemon:
|
||
|
|
|
||
|
|
```ini
|
||
|
|
[docker]
|
||
|
|
nodes=[
|
||
|
|
"unix:///var/run/docker.sock",
|
||
|
|
"unix:///var/run/docker.sock",
|
||
|
|
"unix:///var/run/docker.sock",
|
||
|
|
"unix:///var/run/docker.sock"
|
||
|
|
]
|
||
|
|
```
|
||
|
|
|
||
|
|
### Distribution
|
||
|
|
|
||
|
|
As your installation grows you may need to distribute your builds across multiple servers. Since Docker exposes a REST API we can easily configure Drone to communicate with remote servers. First we'll need to generate an SSL certificate in order to secure communication across nodes.
|
||
|
|
|
||
|
|
We recommend using this Gist to generate keys:
|
||
|
|
https://gist.github.com/bradrydzewski/a6090115b3fecfc25280
|
||
|
|
|
||
|
|
This will generate the following files:
|
||
|
|
|
||
|
|
* ca.pem
|
||
|
|
* cert.pem
|
||
|
|
* key.pem
|
||
|
|
* server-cert.pem
|
||
|
|
* server-key.pem
|
||
|
|
|
||
|
|
Update your Drone configuration to use the `cert.pem` and `key.pem` files and remote daemon URLs:
|
||
|
|
|
||
|
|
```ini
|
||
|
|
[docker]
|
||
|
|
cert="/path/to/cert.pem"
|
||
|
|
key="/path/to/key.pem"
|
||
|
|
nodes = [
|
||
|
|
"tcp://172.17.42.1:2376",
|
||
|
|
"tcp://172.17.42.2:2376",
|
||
|
|
"tcp://172.17.42.3:2376",
|
||
|
|
"tcp://172.17.42.4:2376"
|
||
|
|
]
|
||
|
|
```
|
||
|
|
|
||
|
|
> Remember that you can add the same URL multiple times to increase concurrency!
|
||
|
|
|
||
|
|
Finally, you need to place the server key, certificate and ca on each remote server. You'll need to update the Docker daemon configuration on each remote server (in `/etc/init/drone-dart.conf`) and restart Docker:
|
||
|
|
|
||
|
|
```bash
|
||
|
|
# Use DOCKER_OPTS to modify the daemon startup options.
|
||
|
|
DOCKER_OPTS="--tlsverify --tlscacert=/etc/ssl/docker/ca.pem --tlscert=/etc/ssl/docker/server-cert.pem --tlskey=/etc/ssl/docker/server-key.pem -H=0.0.0.0:2376 -H unix:///var/run/docker.sock"
|
||
|
|
```
|
||
|
|
|
||
|
|
Lastly, we can verify that everything is configured correctly. We can try to connect to a remote Docker server from our Drone server using the following command:
|
||
|
|
|
||
|
|
```bash
|
||
|
|
sudo docker \
|
||
|
|
--tls \
|
||
|
|
--tlscacert=/path/to/ca.pem \
|
||
|
|
--tlscert=/path/to/cert.pem \
|
||
|
|
--tlskey=/path/to/key.pem \
|
||
|
|
-H=1.2.3.4:2376 version
|
||
|
|
```
|