Recent content by gurubert

Sind die OSDs mit Version 19 erstellt worden? https://docs.clyso.com/docs/kb/known-bugs/squid/ Wobei in der Fehlerbeschreibung kein Hängen sondern ein Crash erwähnt wird.

Beim Interface warnt Checkmk, weil sich die Geschwindigkeit seit dem ersten Service Discovery geändert hat. Ist das tatsächlich der Fall (von 10G auf 1G)? Oder ist das jetzt einfach anderes Interface an dem Index? Dann sollte besser der Interfacename im Servicenamen auftauchen. Dafür gibt es in...

OSDs need both networks (Ceph public_network and cluster_network) to function on all nodes to be able to properly work . If one of these two networks do not work the OSDs flap.

Is it configurable after you manually migrate the VM to node 2? What happens to the mirror port on node 1 after the migration?

Slow networking also adds latency.

For erasure coding with k=8 and m=3 you need at least 12 nodes.

The cluster should come back.

All VMs will stop working as the Ceph cluster will stop working. The Proxmox cluster also will stop working.

There is the vmfs-tools package available on Debian. But this is out of the support scope of Proxmox.

Isn't the issue here that the client process requesting the data from the OSDs needs to know where in the CRUSH topology it runs? In a hyperconverged cluster with only three nodes this may be a very good optimization, because there all data is stored on the local node. In larger clusters this is...

Ping times are way too high for corosync. And do I read that correctly that there is an Internet connection involved? Do you use some kind of VPN between the sites? As can be seen with the round trip times (rtt min/avg/max/mdev = 15.667/25.435/33.892/3.466 ms) there is also much jitter on the...

What is the network latency between the nodes on the network used for corosync? is this network on a shared medium? Can there be congestion?

Do not use consumer devices with Ceph.

When even the kernel shows an IO error (in dmesg) it is time to replace the device.

After changing the hostname a reboot is recommended as other services may also still use the old hostname.