Monitoring SSH

This article will help you get the Ssh plugin for sd-agent configured and returning metrics

Installing the ssh plugin package

Install the ssh plugin on Debian/Ubuntu:

sudo apt-get install sd-agent-ssh-check

Install the ssh plugin on RHEL/CentOS:

sudo yum install sd-agent-ssh-check

Read more about agent plugins.

Configuring the agent to monitor ssh

1. Configure the check in /etc/sd-agent/conf.d/ssh_check.yaml

init_config:

instances:
  - host: $REMOTE_HOST  # required
    username: $USERNAME # required
    password: $PASSWORD # or use private_key_file
#   private_key_file: $PATH_TO_PRIVATE_KEY
#   private_key_type:         # rsa or ecdsa; default is rsa
#   port: 22                  # default is port 22
#   sftp_check: False         # set False to disable SFTP check; default is True
#   add_missing_keys: True    # default is False

2. Restart the agent

sudo /etc/init.d/sd-agent restart

or

sudo systemctl restart sd-agent

Verifying the configuration
Execute info to verify the configuration with the following:

sudo /etc/init.d/sd-agent info 

or

/usr/share/python/sd-agent/agent.py info

If the agent has been configured correctly you'll see an output such as:

ssh
-----
  - instance #0 [OK]
  - Collected * metrics

You can also view the metrics returned with the following command:

sudo -u sd-agent /usr/share/python/sd-agent/agent.py check ssh_check

Configuring graphs

Click the name of your server from the Devices list in your Server Density account then go to the Metrics tab. Click the + Graph button on the right then choose the ssh metrics to display the graphs. The metrics will also be available to select when building dashboard graphs.

Monitored metrics

Metric	Values
sftp.response_time The response time of SFTP	second / None Type: float