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docs: member cluster labeling script #807

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May 9, 2024
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docs: member cluster labeling script #807

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23 changes: 18 additions & 5 deletions hack/Azure/setup/README.md
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Expand Up @@ -106,12 +106,25 @@ more information.

You can add labels to a `MemberCluster` object in the same as with any other Kubernetes object.
These labels can then be used for targeting specific clusters in resource placement. To add a label,
run the command below:
run the commands below:

```sh
# Replace the values of MEMBER_CLUSTER, LABEL_KEY, and LABEL_VALUE with those of your own.
export MEMBER_CLUSTER=YOUR-MEMBER-CLUSTER
export LABEL_KEY=YOUR-LABEL-KEY
export LABEL_VALUE=YOUR-LABEL-VALUE
# Replace the values of <MEMBER_CLUSTER>, <LABEL_KEY>, and <LABEL_VALUE> with those of your own.
export MEMBER_CLUSTER=<YOUR-MEMBER-CLUSTER<
export LABEL_KEY=YOUR-<LABEL-KEY>
export LABEL_VALUE=<YOUR-LABEL-VALUE>
kubectl label membercluster $MEMBER_CLUSTER $LABEL_KEY=$LABEL_VALUE
```

Or, you can add the same label to multiple clusters at once by running the following script:
```
# Replace the value <number-of-member-cluster> to the desired number of member clusters you want to label.
chmod +x hack/Azure/setup/labelMC.sh
./hack/Azure/setup/labelMC.sh $LABEL_KEY=$LABEL_VALUE <number-of-member-clusters>
```
>**NOTE:** The script will label the number of member clusters at random.

To view the labels your current member clusters have been assigned, run the following command:
```
kubectl get membercluster --show-labels
```
18 changes: 18 additions & 0 deletions hack/Azure/setup/labelMC.sh
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@@ -0,0 +1,18 @@
# CAN ONLY BE RUN AFTER CREATING NEEDED AKS CLUSTERS AND HUB CLUSTER. This script add labels to specified number of
# member clusters at random.

label=$1
count=$2

# Get the list of member clusters
clusters=($(kubectl get memberclusters -A -o jsonpath='{.items[*].metadata.name}'))

# Shuffle the indices
shuffled_indices=($(shuf -i 0-$((${#clusters[@]} - 1))))

# Label the specified number of clusters
for index in "${shuffled_indices[@]:0:$count}"; do
cluster=${clusters[$index]}
kubectl label membercluster "$cluster" "$label" --overwrite
echo "Labeled $cluster with label: $label"
done
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