I’ve been wrestling with an annoying issue in Longhorn lately and could really use some insights from anyone who’s run into something similar. So here’s the deal: I’ve got a few worker nodes and everything seems to be running relatively smoothly, or at least it was… until I noticed that one of my nodes isn’t allocating any replicas.
I’ve checked and double-checked the specs, and I’m confident that this particular node has plenty of resources available—CPU, memory, and storage are all free and ready to go. It’s frustrating because, by all accounts, it should be distributing replicas just fine. Yet, it seems like Longhorn is completely ignoring it when it comes to replica allocation.
At first, I thought maybe it was a configuration issue on my part. So, I went through my settings and everything looks right. Replication settings are set up as expected, and it should be balancing things out. But still, no replicas are being created on this one node. What drives me nuts is that this isn’t the first time I’ve set up Longhorn, and I swear it worked better before.
I’ve tried restarting the node, and even re-checking the Longhorn manager for any obvious alerts or issues, but there’s nothing there that jumps out at me. I’ve also checked the logs for the affected node, but they don’t seem to indicate any problems either; it’s almost like the node is just being overlooked completely.
Has anyone experienced a similar problem? I’m really looking for any suggestions on what to look at next or if there are any settings that could have been accidentally altered. Honestly, I just want this to be straightforward, but it feels like I’m stuck in a loop of troubleshooting with no real progress. Any help would be appreciated!
It sounds like you’re facing a frustrating situation with your Longhorn setup, especially with replica allocation. Given that the node has ample resources and you’ve already verified your configuration settings, there are a few specific areas to investigate. Start by checking if the problematic node has any specific taints that could be affecting the scheduling of replicas. In Kubernetes, for instance, taints can prevent a pod from being scheduled on a node unless the pod has a matching toleration. Additionally, ensure that the volume and replica settings are consistent across all nodes, as distinct settings can lead to unexpected behavior in how replicas are distributed.
Another key area to explore would be the longhorn-manager and longhorn-instance-manager logs for hints beyond just the node logs. Specifically, look for any errors or warnings that might indicate issues with replica creation or node connectivity. In some cases, a network partition or miscommunication between the Longhorn components can lead to anomalies like the one you’re experiencing. Lastly, consider upgrading to the latest version of Longhorn if you haven’t already, as this could potentially fix bugs that might be affecting replica allocation. If the issue persists, seeking help on Longhorn’s community forums or GitHub issues page might provide insights from others who have faced similar challenges.
It sounds super frustrating! I’ve been there too, and sometimes it’s the little things that trip us up. Here are a few things you could check:
Also, if you haven’t already, you could try to temporarily remove and then re-add the node to Longhorn. It sometimes helps reset any weird states that might be lingering.
Don’t hesitate to check the Longhorn community forums too; a lot of times, someone else has run into the same issue and can share what worked for them. Good luck!