Update Kernels

Pre requisites:

  • All target nodes should be running RHEL, Rocky Linux, or Ubuntu OS.

  • Download the kernel packages using local_repo.yml.

  • Verify that the cluster nodes are in the booted state.

Install kernel updates to cluster nodes

  1. Go to utils/software_update and edit software_update_config.yml, as per the parameters table below.

Parameters for Kernel Update

Parameter

Details
softwares_list

string Required

  • Mandatory, when package_list is not provided

  • This variable contains the list of software group mentioned in software_config.json.

  • Example:

    softwares_list: 
 - custom

  • In the above case, user is required to create custom.json under input/config/<cluster_os_type>/<cluster_os_version>/custom.json. For example: input/config/ubuntu/22.04/custom.json

  • This json should list the kernel packages to be downloaded during local_repo.yml execution, and for installation as part of software_update.yml execution. Kernel package name of Ubuntu is linux-generic, whereas for RHEL or Rocky, it’s just kernel*. For example:

     {
 "custom": {
     "cluster": [
         {
             "package": "linux-generic",
             "type": "deb",
             "repo_name": "jammy"
          }
      ]
   }
}
package_list

string Required

  • Mandatory, when softwares_list is not provided

  • This variable contains the list of packages to be installed on remote nodes.

  • Example:

    package_list: 
 - linux-generic

  • Kernel package name of Ubuntu is linux-generic, whereas for RHEL or Rocky, it’s just kernel*.
reboot_required

boolean Required

  • Indicates whether the remote nodes listed will be rebooted.

  • For Kernel update, the value reboot_required must be set to true.

  1. To run the playbook, run the following commands:

    cd utils/software_update
ansible-playbook software_update.yml -i inventory

Note

Inventory should contain the IP/hostname/service tag of the target nodes. For example,

10.5.0.101
10.5.0.102
  1. After execution is completed, verify that kernel packages are on the nodes using:

    • For RHEL/Rocky Linux: rpm -qa | grep kernel

    • For Ubuntu: dpkg -l | grep linux-generic

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