Adding node removes all other nodes

Percona Monitoring and Management (PMM) PMM 2.x
1

I am not sure if I’m doing this right.

I have several servers I need to add to my PMM Server.

I run:
pmm-admin config --server-insecure-tls --server-url=https://admin:admin@<mypmm-address>:443 192.168.65.90 generic myserver1

When I do that, the other servers disappear.

I check with:
pmm-admin inventory list nodes

And I get:
Failed to get PMM Server parameters from local pmm-agent: pmm-agent is not connected to PMM Server.

Why does it remove all the other nodes when I connect a node? Do I need to add all the nodes from a single server?

1 Like
2

Hi @csheridan thank you for posting to the Percona forums!

Adding a new node should not remove any other nodes. Your pmm-admin config command syntax looks accurate.

Your error message seems as if the pmm-agent process isn’t running. Can you check with:

systemctl status pmm-agent

If it is stopped, start it up and then check the inventory list again

systemctl start pmm-agent
3

I can confirm it is running:

● pmm-agent.service - pmm-agent
     Loaded: loaded (/lib/systemd/system/pmm-agent.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2023-01-26 11:08:49 CST; 11min ago
   Main PID: 11667 (pmm-agent)
      Tasks: 21 (limit: 76623)
     Memory: 13.1M
     CGroup: /system.slice/pmm-agent.service
             └─11667 /usr/sbin/pmm-agent --config-file=/usr/local/percona/pmm2/config/pmm-agent.yaml

So, if I have 5 servers I need to send data to PMM, I need to run the command on each server, correct?

Because when I run this command:

pmm-admin config --force --server-insecure-tls --server-url=https://admin:admin@<pmm-url>:443 192.168.65.90 generic <server name>

I get:

Checking local pmm-agent status...
pmm-agent is running.
Registering pmm-agent on PMM Server...
Registered.
Configuration file /usr/local/percona/pmm2/config/pmm-agent.yaml updated.
Reloading pmm-agent configuration...
Configuration reloaded.
Checking local pmm-agent status...
pmm-agent is running.

However, when I run:

pmm-admin inventory list nodes

I get:

Failed to get PMM Server parameters from local pmm-agent: pmm-agent is not connected to PMM Server.

4

Hey guess what? I was using the wrong port because the PMM Server is proxied. No wonder it wasn’t working.

5

What version of PMM are you running as well as client?

when you run pmm-admin status is a similar error returned?

The only thing that is coming to mind is if you possibly changed ports/IP’s that pmm-agent is running on…I think there’s a bug where you can change the port, start the server but certain commands assume a default 127.0.0.1 IP and port 7777 so if it’s not there it’ll fail.

**Edit** just saw your answer…I’ll leave here for anyone else that may have an issue now there’s two things to check!