Check the ssl certification's expiry.
check-ssl-cert --host mackerel.io --warning 30 --critical 7
First, build this program.
go get github.com/mackerelio/go-check-plugins
cd $(go env GOPATH)/src/github.com/mackerelio/go-check-plugins/check-ssl-cert
go install
Or you can use this program by installing the official Mackerel package. See Using the official check plugin pack for check monitoring - Mackerel Docs.
Next, you can execute this program :-)
check-ssl-cert --host mackerel.io --warning 30 --critical 7
If there are no problems in the execution result, add a setting in mackerel-agent.conf .
[plugin.checks.check-ssl-cert-sample]
command = ["check-ssl-cert", "--host", "mackerel.io", "--warning", "30", "--critical", "7"]
-H, --host= Host name
-p, --port= Port number (default: 443)
-w, --warning=days The warning threshold in days before expiry (default: 30)
-c, --critical=days The critical threshold in days before expiry (default: 14)
--ca-file= A CA Cert file to use for server authentication
--cert-file= A Cert file to use for client authentication
--key-file= A Key file to use for client authentication
--no-check-certificate Do not check certificate
Please execute check-ssl-cert -h
and you can get command line options.