Troubleshooting Oracle OCI Cluster Startup Failures¶
Diagnosing and Fixing Problems¶
The table that follows lists some common error messages that may be logged when a cluster fails to start, describes the underlying causes, and provides remedies:
|Error message text||Cause||What to do|
||Master daemon cannot talk to worker daemon, or worker is down or out of disk space.||Make sure you have configured the subnet so as to allow communication among all nodes: see Configuring Oracle OCI Resources.|
||Bringing up this cluster would exceed this tenancy’s limit for instances of this type.||Decrease the cluster size, or change the instance type, and try again. If that fails, ask Oracle support for a higher limit.|
||QDS cannot contact the cluster master node via SSH.||Make sure you have whitelisted port 22 for the QDS NAT (126.96.36.199); use the subnet’s security list to do this.|
Here are some guidelines to help you prevent similar problems in the future.
- Make sure you have configured each subnet so as to allow communication among all nodes.
- Make sure you have whitelisted port 22 for the QDS NAT (188.8.131.52).
- Make sure that starting the cluster will not put you over the limit for your tenancy.