Watchdog: Check Types

Mode	Where the check runs
Dashboard	Only in the dashboard's worker container. The type needs a URL from the client record
Agent	Only on an agent. The type needs direct access to the machine
Dashboard or Agent	Network-level check that can run from either side

Check	Type identifier	Runner	Tests
HTTP Reachability	`http`	Dashboard	Whether a URL returns an expected status code
HTTP Content	`http_content`	Dashboard	Whether the response body contains or lacks given strings
SSL Certificate	`ssl_cert`	Dashboard	Remaining validity of the TLS certificates of several hosts
DNS	`dns`	Dashboard or Agent	Whether a host name resolves, optionally to an expected IP
TCP Port	`tcp_port`	Dashboard or Agent	Whether a TCP port accepts connections
Redis	`redis`	Dashboard or Agent	PING to a Redis server and a PONG reply
Database	`database`	Dashboard or Agent	Whether a PDO connection can be established
Docker Container Health	`docker`	Dashboard or Agent	Running and health state of a container
Docker Exec	`docker_exec`	Dashboard or Agent	Exit code of a command inside a container
Disk Space	`disk_space`	Agent	Usage of a mount point in percent
Load Average	`load_average`	Agent	System load relative to the CPU count
Process Running	`process`	Agent	Whether a process is running
Log File	`log_file`	Agent	Freshness of a log file and a pattern inside it
File Age	`file_age`	Agent	How long a file has gone unmodified
File Size	`file_size`	Agent	Whether a file's size is within the allowed range

¶ Watchdog: Check Types