Add node to cluster fails on pve-manager/8.4.14

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ralph42

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Nov 4, 2025
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My cluster has 3 nodes, all the same version
Now I want to add a 4th node, I applied all updates to have the same version on all nodes.
Hosts is identical on all 4 nodes. Also DNS, passwords, they are in the same network an are able to reach each other.

node04 shall be added. On this node, I have /etc/pve/nodes/node04 folder existing, with all rights for root. Also I have all the usual files in /etc/pve/priv/

Then I start adding node04 by pasting the cluster join info. After a while, I see a message from node04 that creating /etc/pve/nodes/node04 failed due to missing permissions.
At this moment, I have to shutdown node04 quickly, otherwise my cluster breaks completely.

Investigation after that:
- /etc/pve/nodes/node04 exists on node01, node02, node03. On node04 even /etc/pve/nodes is missing and cannot be created manually, due to missing permissions.
- In journalctl I see a message that /etc/pve/priv/authorized_keys cannot be created. In fact, now this folder is empty with the only exception of a folder called "lock". the write permission is indeed removed.
 
Welcome to the forum, ralph42!

If you compare the permissions (read, write, execute) of /etc/pve/ and its subdirectories in particular nodes, what do you see?
 
On node01..03 in /etc/pvenodes has drwxr-xr-x and /etc/pve/priv has drwx------
On node 04 (the one I tried to add) it looked the same before adding now /etc/pve/nodes is missing completely and /etc/pve/priv has dr-x------
/etc/pve has drwxr-xr-x
 
If /etc/pve/priv is dr-x------ then execute chmod u+w /etc/pve/priv

If /etc/pve is really drwxr-xr-x then I don't know why nodes can't be created even manually.
 
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My suspicion is that during the adding process something goes wrong with the filesystem. But I don't have too much of an idea how to do diagnostic on that.
 
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