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Update "Migrate to Cilium" how-to #329

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May 17, 2024
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Update "Migrate to Cilium" how-to #329

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18 changes: 17 additions & 1 deletion docs/modules/ROOT/pages/how-tos/network/migrate-to-cilium.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -174,7 +174,7 @@ HOST_PREFIX=$(kubectl get network.config cluster \

yq -i '.parameters.cilium.cilium_helm_values.ipam.operator.clusterPoolIPv4MaskSize = "'"${HOST_PREFIX}"'"' \
"${CLUSTER_ID}.yml"
yq -i '.parameters.cilium.cilium_helm_values.ipam.operator.clusterPoolIPv4PodCIDR = "'"${POD_CIDR}"'"' \
yq -i '.parameters.cilium.cilium_helm_values.ipam.operator.~clusterPoolIPv4PodCIDRList = "'"${POD_CIDR}"'"' \
"${CLUSTER_ID}.yml"
----

Expand All @@ -196,6 +196,12 @@ commodore catalog compile "${CLUSTER_ID}"

. Patch cluster network config
+
[IMPORTANT]
====
Only execute this step after you've paused all machine config pools.
Otherwise, nodes may reboot into a state where they're stuck in `NotReady`.
====
+
[source,bash]
----
kubectl --as=cluster-admin patch network.config cluster \
Expand Down Expand Up @@ -259,6 +265,16 @@ You may need to grab the cluster-admin credentials to complete this step since t
+
[TIP]
====
You may want to restart the multus daemonset once the old CNI pods are removed.

[source,bash]
----
kubectl --as=cluster-admin -n openshift-multus rollout restart ds/multus
----
====
+
[TIP]
====
It may be necessary to force drain nodes manually to allow the machine-config-operator to reboot the nodes.
Use `kubectl --as=cluster-admin drain --ignore-daemonsets --delete-emptydir-data --force --disable-eviction` to circumvent PDB violations if necessary.

Expand Down