Expanding Node Disk Capacity

System Disk

  1. Expand the capacity of the system disk on the EVS console.
  2. Restart the node on the ECS console.
  3. Log in to the CCE console and click the cluster. In the navigation pane, choose Nodes. Click More > Sync Server Data at the row containing the target node.

Node Data Disk (Dedicated for Docker)

  1. Expand the capacity of the data disk on the EVS console.
  2. Log in to the CCE console and click the cluster. In the navigation pane, choose Nodes. Click More > Sync Server Data at the row containing the target node.
  3. Log in to the target node.
  4. Run the lsblk command to check the block device information of the node.

    A data disk is divided depending on the container storage Rootfs:

    • Overlayfs: No independent thin pool is allocated. Image data is stored in the dockersys disk.
      # lsblk
NAME                MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda                   8:0    0   50G  0 disk 
└─sda1                8:1    0   50G  0 part /
sdb                   8:16   0  200G  0 disk 
├─vgpaas-dockersys  253:0    0   90G  0 lvm  /var/lib/docker               # Space used by Docker.
└─vgpaas-kubernetes 253:1    0   10G  0 lvm  /mnt/paas/kubernetes/kubelet  # Space used by Kubernetes.

      Run the following commands on the node to add the new disk capacity to the dockersys disk:

      pvresize /dev/sdb 
lvextend -l+100%FREE -n vgpaas/dockersys
resize2fs /dev/vgpaas/dockersys
    • Devicemapper: A thin pool is allocated to store image data.
      # lsblk
NAME                                MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda                                   8:0    0   50G  0 disk 
└─sda1                                8:1    0   50G  0 part /
sdb                                   8:16   0  200G  0 disk 
├─vgpaas-dockersys                  253:0    0   18G  0 lvm  /var/lib/docker    
├─vgpaas-thinpool_tmeta             253:1    0    3G  0 lvm                   
│ └─vgpaas-thinpool                 253:3    0   67G  0 lvm                   # Thin pool space.
│   ...
├─vgpaas-thinpool_tdata             253:2    0   67G  0 lvm  
│ └─vgpaas-thinpool                 253:3    0   67G  0 lvm  
│   ...
└─vgpaas-kubernetes                 253:4    0   10G  0 lvm  /mnt/paas/kubernetes/kubelet

      Run the following commands on the node to add the new disk capacity to the thinpool disk:

      pvresize /dev/sdb 
lvextend -l+100%FREE -n vgpaas/thinpool

Node Data Disk (Kubernetes)

  1. Expand the capacity of the data disk on the EVS console.
  2. Log in to the CCE console and click the cluster. In the navigation pane, choose Nodes. Click More > Sync Server Data at the row containing the target node.
  3. Log in to the target node.
  4. Run the following commands on the node to add the new disk capacity to the Kubernetes disk:

    pvresize /dev/sdb
lvextend -l+100%FREE -n vgpaas/kubernetes
resize2fs /dev/vgpaas/kubernetes

Parent topic: Storage