- Adding Journal Device to an existing node.
Adding Journal Device to an existing node.
This section illustrates how to add a journal device to an existing node.
1. Enter maintenance mode
In order to add journal device to a node, the node must be put in maintenance mode
sudo /opt/pwx/bin/pxctl service maintenance --enter This is a disruptive operation, PX will restart in maintenance mode. Are you sure you want to proceed ? (Y/N): Y
Check if the node is in maintenance mode
sudo /opt/pwx/bin/pxctl status PX is in maintenance mode. Use the service mode option to exit maintenance mode. Node ID: a0b87836-f115-4aa2-adbb-c9d0eb597668 IP: 126.96.36.199 Local Storage Pool: 0 pool Pool IO_Priority Size Used Status Zone Region No storage pool Local Storage Devices: 0 device Device Path Media Type Size Last-Scan No storage device total - 0 B Cluster Summary Cluster ID: bb4bcf13-d394-11e6-afae-0242ac110002 Node IP: 188.8.131.52 - Node ID: a0b87836-f115-4aa2-adbb-c9d0eb597668 In Maintenance Global Storage Pool Total Used : 0 B Total Capacity : 0 B AlertID Resource ResourceID Timestamp Severity AlertType Description 39 CLUSTER a56a4821-6f17-474d-b2c0-3e2b01cd0bc3 Jan 8 06:01:22 UTC 2017 ALARM Node state change Node a56a4821-6f17-474d-b2c0-3e2b01cd0bc3 has an Operational Status: Down 48 NODE a0b87836-f115-4aa2-adbb-c9d0eb597668 Jan 8 21:45:25 UTC 2017 ALARM Cluster manager failure Cluster Manager Failure: Entering Maintenance Mode because of Storage Maintenance Mode
2. Add the journal device to the node
A journal device is recommended to be an SSD/NVME.
sudo /opt/pwx/bin/pxctl service drive add -d /dev/nvme01 --journal Successfully added journal device /dev/nvme010p1
NOTE: The journal device is expected to not have any filesystem on it, This can be verified by running
blkid /dev/nvme01. If it has a filesystem on it and you still want to use it as a journal device, the filesystem should be removed by running
wipefs -a /dev/nvme01
3. Exit maintenance mode
sudo /opt/pwx/bin/pxctl service maintenance --exit