Docker: danschmidt5189/systemd_mon

Includes fixes to the existing krommit/systemd_mon image:

• Adds the ca-certificates package so SSL connections work
• Uses a (very) specific base image and auto-builds when that updates
• Sets a default config file so you don't have to (./systemd_mon.yml)

Usage

As a one-off container:

docker run \
  --rm \
  --name systemd_mon \
  --mount type=bind,src=/path/to/systemd_mon.yml,dst=/systemd_mon.yml,ro \
  --mount type=bind,src=/var/run/dbus,dst=/var/run/dbus,ro \
  --hostname "$HOSTNAME" \
  danschmidt5189/systemd_mon

As a Swarm service:

docker service create \
  --name systemd_mon \
  --mount type=bind,src=/path/to/systemd_mon.yml,dst=/systemd_mon.yml,ro \
  --mount type=bind,src=/var/run/dbus,dst=/var/run/dbus,ro \
  --hostname "$HOSTNAME" \
  danschmidt5189/systemd_mon

Two comments:

• We set --hostname so that systemd_mon sends the actual host's hostname and not just its ephemeral container ID.
• Docker experts will probably want to use something other than a bind-mount to load the configuration file (e.g. docker config; systemd_mon's config loading isn't very Docker-friendly at the moment).