zap51 opened a new issue, #8718:
URL: https://github.com/apache/cloudstack/issues/8718
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##### ISSUE TYPE
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* Bug Report
##### COMPONENT NAME
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CKS
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##### CLOUDSTACK VERSION
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branch.
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4.16.1.0 onwards
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##### CONFIGURATION
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advanced networking, etc. N/A otherwise
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Advanced Networking
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##### OS / ENVIRONMENT
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Ubuntu 20.04 and later
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##### SUMMARY
<!-- Explain the problem/feature briefly -->
A Kubernetes Cluster managed by CKS fails to acquire external IP for the
service of type "LoadBalancer" when the cluster / node names have upper case
letters.
##### STEPS TO REPRODUCE
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test-case. Use Screenshots if accurate.
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<!-- Paste example playbooks or commands between quotes below -->
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1. Create a cluster with some name which contains upper case characters like
for example "Kubernetescl34t"
2. Nodes come online with lower case letters
# kubectl get no
NAME STATUS ROLES AGE VERSION
kubernetescl34t-control-18dee810e29 Ready control-plane 88s v1.28.4
kubernetescl34t-control-18dee813b32 Ready control-plane 75s v1.28.4
kubernetescl34t-control-18dee81618f Ready control-plane 74s v1.28.4
kubernetescl34t-node-18dee818726 Ready <none> 76s v1.28.4
3. Run a sample pod and create a service of type "LoadBalancer"
# kubectl run --image=nginx nginx
pod/nginx created
root@Kubernetescl34t-control-18dee810e29:~# kubectl expose pod/nginx
--type=LoadBalancer --port=80
service/nginx exposed
4. The external IP doesn't get acquired and the service-controller reports
the below
# kubectl describe svc/nginx
Name: nginx
Namespace: default
Labels: run=nginx
Annotations: <none>
Selector: run=nginx
Type: LoadBalancer
IP Family Policy: SingleStack
IP Families: IPv4
IP: 10.96.80.24
IPs: 10.96.80.24
Port: <unset> 80/TCP
TargetPort: 80/TCP
NodePort: <unset> 31692/TCP
Endpoints: 10.44.0.4:80
Session Affinity: None
External Traffic Policy: Cluster
Events:
Type Reason Age From
Message
---- ------ ---- ----
-------
Normal EnsuringLoadBalancer 6s (x4 over 43s) service-controller
Ensuring load balancer
Warning SyncLoadBalancerFailed 6s (x4 over 42s) service-controller
Error syncing load balancer: failed to ensure load balancer: could not find
network
~~~
Mailing list reference:
https://lists.apache.org/thread/bm1g6lmx6pv2tg8v331rtjn0ytxm4xpj
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##### EXPECTED RESULTS
<!-- What did you expect to happen when running the steps above? -->
~~~
The external IP should be acquired. CKS should enforce only lowercase names
for the cluster and the nodes.
~~~
##### ACTUAL RESULTS
<!-- What actually happened? -->
<!-- Paste verbatim command output between quotes below -->
~~~
Events:
Type Reason Age From
Message
---- ------ ---- ----
-------
Normal EnsuringLoadBalancer 6s (x4 over 43s) service-controller
Ensuring load balancer
Warning SyncLoadBalancerFailed 6s (x4 over 42s) service-controller
Error syncing load balancer: failed to ensure load balancer: could not find
network
~~~
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