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acsulli / okd_libvirt.md
Last active December 22, 2023 03:56

Deploying OKD using libvirt

For this environment, we'll be using these hostname/IP combinations:

  • helper = 192.168.110.39
  • bootstrap = 192.168.110.60
  • controlplane-0 = 192.168.110.61
  • controlplane-0 = 192.168.110.62
  • controlplane-0 = 192.168.110.63
  • worker-0 = 192.168.110.65
  • worker-1 = 192.168.110.66
@acsulli
acsulli / openshift_authn_authz.md
Created July 1, 2021 19:59
Supporting information for the OpenShift.tv live stream here: https://www.youtube.com/watch?v=RG6xt2q72nw

Configuring Active Directory authentication with OpenShift 4

  1. Understand AD LDAP structure and naming. Read the docs on the components

    Refer to the OpenShift docs for the LDAP identity provider and LDAP group syncing.

  2. Create the OAuth config

    # create a secret for the bindDN user password
@acsulli
acsulli / sno_without_ai.md
Created October 20, 2021 21:03
@acsulli
acsulli / disconnected_deep_dive.md
Created December 2, 2021 21:03
This gist represents the files and process used during the Ask an OpenShift Admin livestream from Nov 10th 2021: https://www.youtube.com/watch?v=VkP2PRNanAI.

Mirroring images

This follows the documentation for mirroring images.

  1. Download the images

    • Use dryrun.sh to get the `ImageContentSourcePolicy`` needed for the disconnected cluster.

The values used for the destination registry, which are used for the ICSP, can be arbitrary and changed on the disconnected network to represent your scenario. This is useful if the hostnames / IPs are sensitive.

@acsulli
acsulli / updating_a_cluster.md
Created January 18, 2022 22:33

This gist provides some additional information referenced in the Ask an OpenShift Admin livestream on January 12th, 2022.

Updating OpenShift Clusters

Triggering an update to the cluster is done the same way, whether you're doing an update between z-streams (e.g. 4.9.8 -> 4.9.13) or an upgrade between y-releases (e.g. 4.8.z -> 4.9.z). There are three primary options:

  1. Use the webconsole This is pretty straightforward, browse to the Administration panel, then click the update button. If you're upgrading between y-releases, you may need to change the release stream.

  2. Use the CLI

@acsulli
acsulli / aoa-2022-09-14.md
Created September 14, 2022 11:28

This was tested using a default OpenShift 4.11 IPI deployment to AWS. The worker nodes had 16GiB of memory.

First, we'll need a namespace to use for the below experiments.

oc new-project alloc

Before starting, we need to configure eviction thresholds