Various monitoring plugins in golang

This repository is meant to host various monitoring plugins for Nagios (or Centreon, or Icinga) written in golang. I will update it as I rewrite my old shell-based scripts or write new ones.

Building

Running the build.sh bash script will build the plugins for both the amd64 and 386 architectures. It will create a bin/ directory with architecture-specific subdirectories.

Plugins

SSL certificate expiry

The check_ssl_certificate plugin can be used to check that the certificate from a TLS service has not expired and is not going to expire shortly. It supports the following command-line flags:

• -H name/--hostname name: the host name to connect to.
• -P port/--port port: the TCP port to connect to.
• -W days/--warning days: a threshold, in days, below which a warning will be emitted for this service.
• -C days/--critical days: a threshold, in days, below which the plugin will indicate that the service is in a critical state.
• --ignore-cn-only: do not cause errors if a certificate does not have SANs and relies on the CN field.
• -a names/--additional-names names: a comma-separated list of DNS names that the certificate should also have.
• -s protocol/--start-tls protocol: protocol to use before requesting a switch to TLS. Supported protocols: smtp, sieve.

DNS zone serials

The check_zone_serial plugin can be used to check that the version of a zone served by a DNS is up-to-date compared to the same zone served by another, "reference" DNS. It supports the following command-line flags:

• -H name/--hostname name: the host name or address of the server to check.
• -P port/--port port: the port to use on the server to check (defaults to 53).
• -z zone: the zone to check.
• -r name/--rs-hostname name: the host name or address of the reference server.
• -p port/--rs-port port: the port to use on the reference server (defaults to 53).