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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 11:19:16 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-07-24 09:53:24 +0000 |
| commit | b5f8ee61a7f7e9bd291dd26b0585d03eb686c941 (patch) | |
| tree | d4d31289c39fc00da064a825df13a0b98ce95b10 /health/guides/redis/redis_master_link_down.md | |
| parent | Adding upstream version 1.44.3. (diff) | |
| download | netdata-upstream.tar.xz netdata-upstream.zip | |
Adding upstream version 1.46.3.upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'health/guides/redis/redis_master_link_down.md')
| -rw-r--r-- | health/guides/redis/redis_master_link_down.md | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/health/guides/redis/redis_master_link_down.md b/health/guides/redis/redis_master_link_down.md deleted file mode 100644 index 5a2d24293..000000000 --- a/health/guides/redis/redis_master_link_down.md +++ /dev/null @@ -1,50 +0,0 @@ -### Understand the alert - -The `redis_master_link_down` alert is triggered when there is a disconnection between a Redis master and its slave for more than 10 seconds. This alert indicates a potential problem with the replication process and can impact the data consistency across multiple instances. - -### Troubleshoot the alert - -1. Check the Redis logs - - Examine the Redis logs for any errors or issues regarding the disconnection between the master and slave instances. By default, Redis log files are located at `/var/log/redis/redis.log`. Look for messages related to replication, network errors or timeouts. - - ``` - grep -i "replication" /var/log/redis/redis.log - grep -i "timeout" /var/log/redis/redis.log - ``` - -2. Check the Redis replication status - - Connect to the Redis master using the `redis-cli` tool, and execute the `INFO` command to get the detailed information about the master instance: - - ``` - redis-cli - INFO REPLICATION - ``` - - Also, check the replication status on the slave instance. If you have access to the IP address and port of the slave, connect to it and run the same `INFO` command. - -3. Verify the network connection between the master and slave instances - - Test the network connectivity using `ping` and `telnet` or `nc` commands, ensuring that the connection between the master and slave instances is stable and there are no issues with firewalls or network policies. - - ``` - ping <slave_ip_address> - telnet <slave_ip_address> <redis_port> - ``` - -4. Restart the Redis instances (if needed) - - If Redis instances are experiencing issues or are unable to reconnect, consider restarting them. Be cautious as restarting instances might result in data loss or consistency issues. - - ``` - sudo systemctl restart redis - ``` - -5. Monitor the situation - - After addressing the potential issues, keep an eye on the Redis instances to ensure that the problem doesn't reoccur. - -### Useful resources - -1. [Redis Replication Documentation](https://redis.io/topics/replication) |