[OSDOCS-13045] (Story) SDN to OVN Migration for ROSA Classic #86794

mletalie · 2025-01-07T22:36:01Z

Version(s):

4.17+
Issue:

https://issues.redhat.com/browse/OSDOCS-13045
QE Review ticket: https://issues.redhat.com/browse/OSDOCS-13168
Link to docs preview:

QE review:

QE has approved this change.

https://86794--ocpdocs-pr.netlify.app/openshift-rosa/latest/networking/ovn_kubernetes_network_provider/migrate-from-openshift-sdn.html
https://86794--ocpdocs-pr.netlify.app/openshift-rosa/latest/networking/about-managed-networking.html

Additional information:

ocpdocs-previewbot · 2025-01-07T22:52:54Z

🤖 Wed Feb 12 20:30:21 - Prow CI generated the docs preview:

https://86794--ocpdocs-pr.netlify.app/openshift-dedicated/latest/networking/about-managed-networking.html
https://86794--ocpdocs-pr.netlify.app/openshift-rosa-hcp/latest/rosa_release_notes/rosa-release-notes.html
https://86794--ocpdocs-pr.netlify.app/openshift-rosa/latest/networking/about-managed-networking.html
https://86794--ocpdocs-pr.netlify.app/openshift-rosa/latest/networking/ovn_kubernetes_network_provider/migrate-from-openshift-sdn.html
https://86794--ocpdocs-pr.netlify.app/openshift-rosa/latest/rosa_release_notes/rosa-release-notes.html

ocpdocs-vale-bot · 2025-01-10T18:41:27Z

networking/about-managed-networking.adoc

 == Additional resources

-* link:https://access.redhat.com/articles/7065170[{OCP-short} SDN CNI removal in OCP 4.17]
+* link:https://access.redhat.com/articles/7065170[{OCP-short} SDN CNI removal in OCP 4.17]


🤖 [error] RedHat.CaseSensitiveTerms: Use 'Red Hat OpenShift Container Platform' rather than 'OCP'. For more information, see RedHat.CaseSensitiveTerms.

ocpdocs-vale-bot · 2025-01-10T19:12:25Z

modules/migrate-sdn-ovn.adoc

@@ -0,0 +1,23 @@
+


🤖 [error] OpenShiftAsciiDoc.ModuleContainsContentType: Module is missing the '_mod-docs-content-type' variable.

bchandra-ocp · 2025-01-14T18:15:05Z

networking/ovn_kubernetes_network_provider/migrate-from-openshift-sdn.adoc

+
+toc::[]
+
+Before upgrading to version 4.17, {product-title} clusters that are configured with the OpenShift SDN network plugin must migrate to the OVN-Kubernetes network plugin. You can perform the migration and check the migration status using the ROSA CLI.


This statement is repeating. Perhaps we leave out "You can perform the migration and check the migration status using the ROSA CLI." here?

Cluster must be in 4.15.z. It's worthwhile to mention both in the introduction section and where the CLI command is provided.

Other operations such as Cluster upgrade will not be allowed during the plugin migration.

Mention that the migration can not be interrupted. Migrating back to SDN is not possible.

Note that the cluster nodes will be rebooted during the migration. There will not be impact to workloads that are resilient to node disruptions.

Migration can take several minutes or hours depending upon the cluster size, and workload configurations.

Very helpful, thanks!

Thank for this info, @bchandra-ocp. Just so I am clear, for point #1, cluster must be version 4.15.z or above, correct? User could also do this for 4.16.z as well?

4.15.22 and above ; or 4.16.24 and above

mletalie · 2025-01-14T20:55:41Z

Currently published doc that uses similar bulleted item format.

ocpdocs-vale-bot · 2025-01-14T21:36:57Z

networking/ovn_kubernetes_network_provider/migrate-from-openshift-sdn.adoc

+As a {rosa-classic-first} cluster administrator, you can initiate the migration from the OpenShift SDN network plugin to the OVN-Kubernetes network plugin as well as verify the migration status using the ROSA CLI.
+
+// Before upgrading to version 4.17, you must migrate {rosa-classic-first} clusters that are configured with the OpenShift SDN network plugin to the OVN-Kubernetes network plugin. You can perform the migration and check the migration status using the ROSA CLI.
+Some considerations prior to starting migration initiation are:


🤖 [error] RedHat.TermsErrors: Use 'before' rather than 'prior to'. For more information, see RedHat.TermsErrors.

Agree with the bot!

Suggested change

Some considerations prior to starting migration initiation are:

Some considerations before starting migration initiation are:

Bot wins! :)

AedinC · 2025-01-16T12:19:21Z

/label peer-review-in-progress

AedinC · 2025-01-16T12:24:49Z

modules/migrate-sdn-ovn.adoc

+  --subnet-configuration <configuration> <2>
+----
+<1> Replace `<cluster_id>` with the ID of the cluster you want to migrate to the OVN-Kubernetes network plugin.
+<2> Replace `<configuration>` with the subnet configuration you want to use for your newly migrated OVN-Kubernetes cluster.


An output example might be helpful here.

Agreed. That should be (will be) added to docs once the developers decide the verbiage of the output.

AedinC

Looks great Mark - just a few very minor suggestions and thoughts!
/remove-label peer-review-in-progress
/label peer-review-done
/label lgtm

AedinC · 2025-01-16T12:29:05Z

modules/migrate-sdn-ovn.adoc

+To check the status of the migration, run the following command:
+[source,terminal]
+----
+rosa describe cluster -c <cluster_id> <1>


An output example would definitely be helpful here, and if not too much trouble, an explanation of the different migration statuses.
Is there a status for 'failed migration' and if so, what can user do to correct this- run the migration command again perhaps?
Also, regarding the migration time - is there any way to tell how long it will be? I see the time can vary between minutes to hours, but just trying to help the user realize when there might be a problem- this might not be possible. Just a few thoughts!

All good points! Will dig around and see if I can find if devs have that info.

@AedinC Did some digging and found this...so going to assume that the state object will provide the info you mentioned...but will verify once OCM-11595 is completed.

AedinC · 2025-01-16T12:34:15Z

networking/ovn_kubernetes_network_provider/migrate-from-openshift-sdn.adoc

+
+toc::[]
+
+As a {rosa-classic-first} cluster administrator, you can initiate the migration from the OpenShift SDN network plugin to the OVN-Kubernetes network plugin as well as verify the migration status using the ROSA CLI.


Would it be helpful to mention that OpenShift SDN network plugin was deprecated in 4.14 and removed in 4.17 and link to OCP release note: https://docs.redhat.com/en/documentation/openshift_container_platform/4.14/html-single/release_notes/index#ocp-4-14-deprecation-sdn?

That info was listed here: https://86794--ocpdocs-pr.netlify.app/openshift-rosa/latest/networking/about-managed-networking but no link was created. I believe there was a reason I didn't duplicate that info in this location but now I need to remember why :(

AedinC · 2025-01-16T12:35:04Z

networking/ovn_kubernetes_network_provider/migrate-from-openshift-sdn.adoc

+As a {rosa-classic-first} cluster administrator, you can initiate the migration from the OpenShift SDN network plugin to the OVN-Kubernetes network plugin as well as verify the migration status using the ROSA CLI.
+
+// Before upgrading to version 4.17, you must migrate {rosa-classic-first} clusters that are configured with the OpenShift SDN network plugin to the OVN-Kubernetes network plugin. You can perform the migration and check the migration status using the ROSA CLI.
+Some considerations prior to starting migration initiation are:


Agree with the bot!

Suggested change

Some considerations prior to starting migration initiation are:

Some considerations before starting migration initiation are:

AedinC · 2025-01-16T12:37:43Z

networking/ovn_kubernetes_network_provider/migrate-from-openshift-sdn.adoc

+
+toc::[]
+
+As a {rosa-classic-first} cluster administrator, you can initiate the migration from the OpenShift SDN network plugin to the OVN-Kubernetes network plugin as well as verify the migration status using the ROSA CLI.


Suggested change

As a {rosa-classic-first} cluster administrator, you can initiate the migration from the OpenShift SDN network plugin to the OVN-Kubernetes network plugin as well as verify the migration status using the ROSA CLI.

As a {rosa-classic-first} cluster administrator, you can initiate the migration from the OpenShift SDN network plugin to the OVN-Kubernetes network plugin and verify the migration status using the ROSA CLI.

AedinC · 2025-01-16T12:38:45Z

modules/migrate-sdn-ovn.adoc

+----
+rosa describe cluster -c <cluster_id> <1>
+----
+<1> Replace `<cluster_id>` with the ID of the cluster to check  migration status.


Suggested change

<1> Replace `<cluster_id>` with the ID of the cluster to check migration status.

<1> Replace `<cluster_id>` with the ID of the cluster to check the migration status.

hunterkepley

Two comments to change --migrate-network-type to --network-type - thanks Mark

hunterkepley · 2025-01-22T18:14:32Z

modules/migrate-sdn-ovn.adoc

+[source,terminal]
+----
+$ rosa edit cluster -c <cluster_id> <1>
+  --migrate-network-type OVNKubernetes


--network-type

hunterkepley · 2025-01-22T18:17:21Z

modules/migrate-sdn-ovn.adoc

+
+[IMPORTANT]
+====
+You cannot include the optional flag `--ovn-internal-subnets` in the command unless you define a value for the flag `--migrate-network-type`.


--network-type

Sorry for the confusion earlier, I was confused as well since it was requested to change this back and forth

hunterkepley

LGTM, one small change but that's it

hunterkepley · 2025-01-22T20:30:37Z

modules/migrate-sdn-ovn.adoc

+  --ovn-internal-subnets <configuration> <2>
+----
+<1> Replace `<cluster_id>` with the ID of the cluster you want to migrate to the OVN-Kubernetes network plugin.
+<2> Optional: Users can create key-value pairs to configure internal subnets using any or all of the options `join, masquerade, transit` along with a single CIDR per option. For example, `--ovn-subnet-configuration="join=0.0.0.0/24,transit=0.0.0.0/24,masquerade=0.0.0.0/24"`.


--ovn-subnet-configuration -> --ovn-internal-subnets

jfrazierRH · 2025-01-22T20:37:57Z

networking/ovn_kubernetes_network_provider/migrate-from-openshift-sdn.adoc

+
+Some considerations before starting migration initiation are:
+
+* The cluster version must be 4.15.22 and above or 4.16.24 and above.


Cluster version 4.15 req has been removed and only 4.16.24+ is supported now.

jfrazierRH · 2025-01-22T21:28:46Z

/lgtm

openshift-ci · 2025-01-29T17:11:56Z

New changes are detected. LGTM label has been removed.

EricPonvelle

Small fix, but not worth blocking merge.

EricPonvelle · 2025-02-12T19:52:06Z

modules/migrate-sdn-ovn.adoc

+To check the status of the migration, run the following command:
+[source,terminal]
+----
+rosa describe cluster -c <cluster_id> <1>


Suggested change

rosa describe cluster -c <cluster_id> <1>

$ rosa describe cluster -c <cluster_id> <1>

rosa_release_notes/rosa-release-notes.adoc

openshift-ci · 2025-02-12T20:31:20Z

@mletalie: all tests passed!

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EricPonvelle · 2025-02-12T20:34:29Z

/cherrypick enterprise-4.17

EricPonvelle · 2025-02-12T20:34:32Z

/cherrypick enterprise-4.18

openshift-cherrypick-robot · 2025-02-12T20:35:17Z

@EricPonvelle: new pull request created: #88512

Details

In response to this:

/cherrypick enterprise-4.17

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openshift-cherrypick-robot · 2025-02-12T20:35:23Z

@EricPonvelle: new pull request created: #88513

Details

In response to this:

/cherrypick enterprise-4.18

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openshift-ci bot added the size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. label Jan 7, 2025

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SDN Migration

400e443

rosa_release_notes/rosa-release-notes.adoc

mletalie force-pushed the OSDOCS-13045 branch from e99c306 to 400e443 Compare February 12, 2025 20:13

SDN OVN

d33c541

EricPonvelle added branch/enterprise-4.17 branch/enterprise-4.18 labels Feb 12, 2025

EricPonvelle merged commit 0784cf1 into openshift:main Feb 12, 2025
2 checks passed

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[enterprise-4.17] [OSDOCS-13045] (Story) SDN to OVN Migration for ROSA Classic #88512

Merged

openshift-cherrypick-robot mentioned this pull request Feb 12, 2025

[enterprise-4.18] [OSDOCS-13045] (Story) SDN to OVN Migration for ROSA Classic #88513

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		toc::[]

		Before upgrading to version 4.17, {product-title} clusters that are configured with the OpenShift SDN network plugin must migrate to the OVN-Kubernetes network plugin. You can perform the migration and check the migration status using the ROSA CLI.

	Some considerations prior to starting migration initiation are:
	Some considerations before starting migration initiation are:


		toc::[]

		As a {rosa-classic-first} cluster administrator, you can initiate the migration from the OpenShift SDN network plugin to the OVN-Kubernetes network plugin as well as verify the migration status using the ROSA CLI.

	<1> Replace `<cluster_id>` with the ID of the cluster to check migration status.
	<1> Replace `<cluster_id>` with the ID of the cluster to check the migration status.


		Some considerations before starting migration initiation are:

		* The cluster version must be 4.15.22 and above or 4.16.24 and above.

	rosa describe cluster -c <cluster_id> <1>
	$ rosa describe cluster -c <cluster_id> <1>

[OSDOCS-13045] (Story) SDN to OVN Migration for ROSA Classic #86794

[OSDOCS-13045] (Story) SDN to OVN Migration for ROSA Classic #86794

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mletalie commented Jan 7, 2025 •

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