Add a Kubernetes Node manually¶

This section describes how to manually add a Kubernetes Node to your MCP cluster to increase the cluster capacity, for example.

To add a Kubernetes Node manually:

1. Add a physical node using MAAS as described in the MCP Deployment Guide: Provision physical nodes using MAAS.

2. Log in to the Salt Master node.

3. Verify that salt-minion is running on the target node and this node appears in the list of the Salt keys:

   salt-key
   

   Example of system response:

   cmp0.bud.mirantis.net
   cmp1.bud.mirantis.net
   cmp2.bud.mirantis.net
   

4. Apply the Salt states to the target node. For example, to cmp2:

   salt 'cmp2*' saltutil.refresh_pillar
   salt 'cmp2*' saltutil.sync_all
   salt 'cmp2*' state.apply salt
   salt 'cmp2*' state.apply linux,ntp,openssh,git
   salt 'cmp2*' state.sls kubernetes.pool
   salt 'cmp2*' service.restart 'kubelet'
   salt 'cmp2*' state.apply salt
   salt '*' state.apply linux.network.host
   

5. If Virtlet will run on the target node, add the node label:

   salt -C 'I@kubernetes:master and 01' \
   cmd.run 'kubectl label --overwrite node cmp2 extraRuntime=virtlet'
   

6. Log in to any Kubernetes Master node.

7. Verify that the target node appears in the list of the cluster nodes and is in the Ready state:

   kubectl get nodes
   

   Example of system response:

   NAME STATUS ROLES AGE  VERSION
   cmp0 Ready  node  54m  v1.10.3-3+93532daa6d674c
   cmp1 Ready  node  54m  v1.10.3-3+93532daa6d674c
   cmp2 Ready  node  2m   v1.10.3-3+93532daa6d674c