Remove a Ceph Monitor node¶

This section describes how to remove a Ceph Monitor node from a Ceph cluster.

To remove a Ceph Monitor node:

1. In your project repository, remove the following lines from the cluster/infra/config/init.yml file or from the pillar based on your environment:

   parameters:
     reclass:
       storage:
         node:
           ceph_mon_node04:
             name: ${_param:ceph_mon_node04_hostname}
             domain: ${_param:cluster_domain}
             classes:
             - cluster.${_param:cluster_name}.ceph.mon
             params:
               salt_master_host: ${_param:reclass_config_master}
               linux_system_codename:  ${_param:ceph_mon_system_codename}
               single_address: ${_param:ceph_mon_node04_address}
               keepalived_vip_priority: 104
   

2. Remove the following lines from the cluster/ceph/common.yml file or from the pillar based on your environment:

   parameters:
     ceph:
       common:
         members:
           - name: ${_param:ceph_mon_node04_hostname}
             host: ${_param:ceph_mon_node04_address}
   

3. Log in to the Jenkins web UI.

4. Open the Ceph - remove node pipeline.

5. Specify the following parameters:

   Parameter	Description and values
   SALT_MASTER_CREDENTIALS	The Salt Master credentials to use for connection, defaults to salt.
   SALT_MASTER_URL	The Salt Master node host URL with the salt-api port, defaults to the jenkins_salt_api_url parameter. For example, http://172.18.170.27:6969.
   HOST	Add the Salt target name of the Ceph Monitor node to remove. For example, cmn04*.
   HOST_TYPE Removed since 2019.2.13 update	Add mon as the type of Ceph node that is going to be removed.

6. Click Deploy.

   The Ceph - remove node pipeline workflow:

   1. Reconfigure the configuration file on all ceph:common minions.
   2. Destroy the VM.
   3. Remove the Salt Minion node ID from salt-key on the Salt Master node.

7. Remove the following lines from the cluster/infra/kvm.yml file or from the pillar based on your environment:

   parameters:
     salt:
       control:
         cluster:
           internal:
             node:
               cmn04:
                 name: ${_param:ceph_mon_node04_hostname}
                 provider: ${_param:infra_kvm_node03_hostname}.${_param:cluster_domain}
                 image: ${_param:salt_control_xenial_image}
                 size: ceph.mon
   

8. Remove the following lines from the cluster/ceph/init.yml file or from the pillar based on your environment:

   _param:
      ceph_mon_node04_hostname: cmn04
      ceph_mon_node04_address: 172.16.47.145
   linux:
     network:
       host:
         cmn04:
           address: ${_param:ceph_mon_node04_address}
           names:
           - ${_param:ceph_mon_node04_hostname}
           - ${_param:ceph_mon_node04_hostname}.${_param:cluster_domain}