Page History

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• Procedure to be used if the VM was created using a volume (the migration procedure doesn't require a downtime)
• Procedure to be used if the VM was created using ephemeral storage (the migration procedure requires a downtime)
• Install the operating system using foreman. For this use the hosts_all foreman hostgroup
• Disable SELinux
• Configure the management and data network

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Once there are no more VMs on that compute node, reinstall the node with AlmaLinux9 using foreman

• The hostgroup must be hosts_all
• The kickstart to be used must be TBC
• TBC

When the node restart after the update, make sure that SELinux is disabled:

[root@cld-np-19 ~]# getenforce 
Disabled

Then do an update of the packages (probabily only puppet will be updated):

[root@cld-np-19 ~]#  yum clean all
[root@cld-np-19 ~]#  yum update -y

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Once the node has been reinstalled with AlmaLinux9, configure the data network

TBC

The address to be used must be the original one

MTU must be 9000

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If this is a DELL host, reinstall DELL OpenManage, as explained here

Check on Nagios that the relevant checks get green

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Then configure the node as Openstack compute node using puppet

Stop puppet:

systemctl stop puppet

In foreman move the host under the ComputeNode-Prod_Yoga  hostgroup

Run puppet manually:

puppet agent -t

If the configuration fails reporting

error: "net.bridge.bridge-nf-call-ip6tables" is an unknown key  
error: "net.bridge.bridge-nf-call-iptables" is an unknown key  
error: "net.bridge.bridge-nf-call-arptables" is an unknown key

...

modprobe br_netfilter

and then rerun puppet

In the configuration fails reporting a problem because of a wrong dependency required by swtpm, then issue:

mv /etc/yum.repos.d/advanced-virtualization.repo /etc/yum.repos.d/advanced-virtualization.repo.old
yum install centos-release-advanced-virtualization

and then rerun puppet

Disable the compute node so that it doesn't accept new VMs:

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Start and enablepuppet:

systemctl start puppet; systemctl enable puppet

• Enable the checks in Nagios for this host

• Wait till all checks are ok (in particular the VM network and volume one: remember to enable the node just for the time to force the run from Nagios; othwerwise the check will fail.)

• Add this node in the following scripts on cld-ctrl-01: /usr/local/bin/display_usage_of_hypervisors.sh, /usr/local/bin/host_aggregate.sh, /usr/local/bin/new_project.sh, /usr/local/bin/free_resources_compute_nodes.sh
• Add this node in the /etc/cron.daily/vm-log.sh script on cld-log
• Create the directory /var/disk-iscsi/qemu/cld-np-19 in cld-log
• Verify that a ssh from root@cld-log to root@cld-np-19 works without requiring password

• Stop puppet on the 2 controller nodes:

  Code Block
  language bash
  systemctl stop puppet

  
  

• Add the new compute node in cld-config:/var/puppet/puppet_yoga/controller_yoga/templates/aai_settings.py.erb

• Run puppet on the first controller node (this will trigger a restart of httpd):

  Code Block
  language bash
  puppet agent -t

  
  

• Run puppet on the second controller node (this will trigger a restart of httpd):

  Code Block
  language bash
  puppet agent -t

  
  

• Start puppet on the two controller nodes:

  Code Block
  language bash
  systemctl start puppet

  
  

• Enable the host:

  Code Block
  language bash
  openstack compute service set --enable cld-np-19.cloud.pd.infn.it nova-compute

  
  

• Add the host to the 'admin' aggregate

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