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Disable the node so that no new VMs will be scheduled on this host. Instructions: Disable/Enable a compute node howto
Migrate the instances on this compute node to other hypervisors. Instructions: Migrate an instance howto (warning: there was once a problem with live-block migration; we therefore decided to always use cold migration)
Just in case save the file /etc/iscsi/initiatorname.iscsi and the output of "ifconfig" command in cld-ctrl-01:/root/Backup/<hostname>
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Reinstall the host with CentOS8 stream using Foreman and move the host to the 'hosts_all' hostgroup
As Operating System choose: CentOS Linux 8.2.2004Stream 8
As Media choose: CentOS-Stream-local
As Partition table select
- "Kickstart default - swap 128 GB" (if this machine has 2 disks: one for the OS and one for the VM ephemeral storage). WARNING this will scratch also the second disk. Chidere a Traldi cosa usare per non scratchare il secondo disco
- "Kickstart default - swap 128 GB 1 disk 2 parts" (if this machine has only one disk for both the OS and the VM ephemeral storage
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Reboot the node.
Enable the host. From cld-ctrl-01 after having sourced admin-openrc.sh:
| Code Block | ||
|---|---|---|
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openstack compute service set --enable cld-np-19.cloud.pd.infn.it nova-compute |
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Force the execution of the sensor "VM network and volume" nagios sensor
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