Watchdog: Docker Exec
Runs a command inside a Docker container through the Docker API and evaluates the exit code. Type docker_exec, runner Dashboard or Agent. Fields and statuses.
Watchdog: Docker Exec
The check runs a command in a running container and evaluates only the exit code. The command's output is discarded.
| Property | Value |
|---|---|
| Type identifier | docker_exec |
| Runner | Dashboard or Agent |
| Target in the email | Container |
Fields
| Field | Key | Default | Meaning |
|---|---|---|---|
| Container name | container_name |
Required. Exact container name | |
| Command | command |
Required. Command run in the container via sh -c, for example php bin/console app:health |
|
| Timeout (seconds) | timeout |
10 |
Time limit for start, execution and evaluation, at least 1 |
Behaviour
| Situation | Status | Message |
|---|---|---|
| Exit code 0 | OK |
Exit code 0 |
| Exit code other than 0 | FAIL |
Exit code <n> |
| Container not found, API error or timeout | FAIL |
Docker API error: <reason> |
| Socket missing | UNKNOWN |
Docker socket not available at /var/run/docker.sock |
| No container name | UNKNOWN |
No container_name configured |
| No command | UNKNOWN |
No command configured |
The command runs in the container as its default user. You can check the reachability of a database inside the Docker network, for example, by running mysqladmin ping in the database container.
The command comes from the check's configuration and runs through the Docker API in any container the daemon knows. Restrict access to the UI and to the Docker socket accordingly.
The socket requirements are the same as for the Docker check.