How do i stop an agent using CLI

Nomad
1

I am trying to stop my client agent in order to restart with an updated hcl file. The only way I know to end the agent is using Ctrl^C, however I have since closed that terminal page. I am looking for a method to kill the agent from anywhere in the vm or restart the agent with the updated file.

2

I was able to reset the agent by manually rebooting my linode. I then was able to start both the server and clients agents. However, I don’t think this is the idea solution.

3

The Nomad client and server agents can be configured by an init system like systemd that should allow you to restart the agent. Here is an example of a systemd file for a Nomad client.

[Unit]
Description=Nomad
Documentation=https://nomadproject.io/docs/
[Service]
ExecStart=/usr/local/bin/nomad agent -config /etc/nomad
ExecReload=/bin/kill -HUP $MAINPID
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target

You can create a service file /etc/systemd/system/nomad.service

4

I assume once the file is present I can issue a command like systemd restart nomad?

5

Yes, if you have systemd installed then you should be able to run systemctl restart nomad.

Note: The service file is just an example. You can customize it as needed for your use case.

6

A more comprehensive systemd unit can be found in the Nomad repository. Installing Nomad from package will also install a systemd unit for you automatically.

Hope this helps!
Charlie Voiselle
Product Education Engineer, Nomad

1 Like
7

The service file is gone from the GH repo, but here is a copy

[Unit]
Description=Nomad
Documentation=https://nomadproject.io/docs/
Wants=network-online.target
After=network-online.target

# When using Nomad with Consul it is not necessary to start Consul first. These
# lines start Consul before Nomad as an optimization to avoid Nomad logging
# that Consul is unavailable at startup.
#Wants=consul.service
#After=consul.service

[Service]
EnvironmentFile=/etc/nomad.d/nomad.env
ExecReload=/bin/kill -HUP $MAINPID
ExecStart=/usr/bin/nomad agent -config /etc/nomad.d
KillMode=process
KillSignal=SIGINT
LimitNOFILE=65536
LimitNPROC=infinity
Restart=on-failure
RestartSec=2
StartLimitBurst=3
StartLimitInterval=10
TasksMax=infinity
OOMScoreAdjust=-1000

[Install]
WantedBy=multi-user.target

from before it was deleted.