Manually run containers

cephadm writes small wrappers that runs a container. Refer to /var/lib/ceph/CLUSTER_FSID/SERVICE_NAME/unit to run the container command.

Analyzing SSH errors

If you get the following error:

Example

    execnet.gateway_bootstrap.HostNotFound: -F /tmp/cephadm-conf-73z09u6g -i /tmp/cephadm-identity-ky7ahp_5 root@10.10.1.2

    ...

    raise OrchestratorError(msg) from e
    orchestrator._interface.OrchestratorError: Failed to connect to 10.10.1.2 (10.10.1.2).

    Please make sure that the host is reachable and accepts connections using the cephadm SSH key

Try the following options to troubleshoot the issue:

To ensure cephadm has a SSH identity key, run the following command:

Example

[ceph: root@host01 /]# ceph config-key get mgr/cephadm/ssh_identity_key > ~/cephadm_private_key
INFO:cephadm:Inferring fsid f8edc08a-7f17-11ea-8707-000c2915dd98
INFO:cephadm:Using recent ceph image docker.io/ceph/ceph:v15 obtained 'mgr/cephadm/ssh_identity_key'
[root@mon1 ~] # chmod 0600 ~/cephadm_private_key

If the command fails, cephadm does not have a key. To generate a SSH key, run the following command:

Example

[ceph: root@host01 /]# chmod 0600 ~/cephadm_private_key

Example

[ceph: root@host01 /]# cat ~/cephadm_private_key | ceph cephadm set-ssk-key -i-

To ensure that the SSH configuration is correct, run the following command:

Example
```
[ceph: root@host01 /]# ceph cephadm get-ssh-config
```

To verify the connection to the host, run the following command:

Example

[ceph: root@host01 /]# ssh -F config -i ~/cephadm_private_key root@host01

Verify public key is in authorized_keys.

To verify that the public key is in the authorized_keys file, run the following commands:

Example

[ceph: root@host01 /]# ceph cephadm get-pub-key
[ceph: root@host01 /]# grep "`cat ~/ceph.pub`" /root/.ssh/authorized_keys