HubMode

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2023-12-01

Basic Functions

1. CIS Deployment Configuration

apiVersion: apps/v1
kind: Deployment
metadata:
  name: k8s-bigip-ctlr
  namespace: bigip-ctlr
  labels:
    app: k8s-bigip-ctlr
spec:
  replicas: 1
  selector:
    matchLabels:
      app: k8s-bigip-ctlr
  template:
    metadata:
      name: k8s-bigip-ctlr
      labels:
        app: k8s-bigip-ctlr
    spec:
      serviceAccountName: bigip-ctlr
      containers:
        - name: k8s-bigip-ctlr
          image: "cloudadc/k8s-bigip-ctlr:2.5.0-WIP"
          env:
            - name: BIGIP_USERNAME
              valueFrom:
                secretKeyRef:
                  name: bigip-login
                  key: username
            - name: BIGIP_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: bigip-login
                  key: password
          command: ["/app/bin/k8s-bigip-ctlr"]
          args: [
            "--bigip-username=$(BIGIP_USERNAME)",
            "--bigip-password=$(BIGIP_PASSWORD)",
            "--bigip-url=192.168.200.208",
            "--insecure=true",
            "--bigip-partition=k8s",
            "--log-as3-response=true",
            "--manage-configmaps=true",
            "--manage-ingress=false",
            "--log-level=INFO",
            "--pool-member-type=cluster",
            "--namespace=control-hub-1",
            "--namespace=control-hub-2"
            ]

2. Deploy applications

kubectl apply -f https://www.xnip.cn/doc/OiXjLrZckjdeploy.yaml

https://www.xnip.cn/doc/OiXjLrZckjdeploy.yaml

3. Deploy https://www.xnip.cn/doc/OiXjLrZckjcm-hub-1.yaml

kubectl apply -f https://www.xnip.cn/doc/OiXjLrZckjcm-hub-1.yaml

https://www.xnip.cn/doc/OiXjLrZckjcm-hub-1.yaml

Test the deployed Service:

$ curl http://192.168.200.41/cafe
Server address: 10.244.1.82:8080
Server name: app-7d84cd8575-hkw6q
Date: 09/Jun/2021:15:38:26 +0000
URI: /cafe
Request ID: 8687dec584795413122cb9a9ff0f39d6

$ curl http://192.168.200.42/cafe
Server address: 10.244.2.101:8080
Server name: app-7d84cd8575-5j7mb
Date: 09/Jun/2021:15:38:31 +0000
URI: /cafe
Request ID: c2310711d82a7d3589b773042134c9c4

4. Deploy https://www.xnip.cn/doc/OiXjLrZckjcm-hub-2.yaml

kubectl apply -f https://www.xnip.cn/doc/OiXjLrZckjcm-hub-2.yaml

https://www.xnip.cn/doc/OiXjLrZckjcm-hub-2.yaml

Test the deployed Service:

$ curl http://192.168.200.43/cafe
Server address: 10.244.1.83:8080
Server name: app1-66b6ffd764-g2c7z
Date: 09/Jun/2021:16:00:47 +0000
URI: /cafe
Request ID: df789b7a2ba7a26fa8b92ac04d65438a

$ curl http://192.168.200.44/cafe
Server address: 10.244.2.102:8080
Server name: app2-85d97bcf99-vm9px
Date: 09/Jun/2021:16:01:06 +0000
URI: /cafe
Request ID: 636f80015136199619e7ca71ce9affa7

5. Expend hubtest01 from 1 pod to 3 pods

$ kubectl get pods -n hubtest01 -o wide --no-headers
app-7d84cd8575-49drf   1/1   Running   0     59s   10.244.1.84    node1   <none>   <none>
app-7d84cd8575-cb2z9   1/1   Running   0     59s   10.244.2.103   node2   <none>   <none>
app-7d84cd8575-lq4p4   1/1   Running   0     17m   10.244.1.82    node1   <none>   <none>

Note	Expect results is two new added pods should be add to F5, but the results is no as expected.

6. Delete all pods from hubtest03

$ for i in $(kubectl get pods -n hubtest03 --no-headers | awk '{print $1}') ; do kubectl delete pod $i -n hubtest03 ; done

Note	Expected results is the updated pod ip should be syn to F5, but the results is not as expected.

7. Clean up

kubectl delete -f https://www.xnip.cn/doc/OiXjLrZckjcm-hub-1.yaml
kubectl delete -f https://www.xnip.cn/doc/OiXjLrZckjcm-hub-2.yaml

Duplicated Label Service

1. Create a Service, make sure the service work as expected

kubectl apply -f https://www.xnip.cn/doc/OiXjLrZckjcm-duplicated-label.yaml

https://www.xnip.cn/doc/OiXjLrZckjcm-duplicated-label.yaml

2. Create a Service with same lable

kubectl apply -f https://www.xnip.cn/doc/OiXjLrZckjdeploy-duplicated-label.yaml

https://www.xnip.cn/doc/OiXjLrZckjdeploy-duplicated-label.yaml

3. Check from CIS log

2021/06/10 07:24:18 [WARNING] [CORE] Multiple Services are tagged for this pool. Using oldest service endpoints.
Service: app-svc, Namespace: hubtest01,Timestamp: 2021-06-10 01:39:29 +0000 UTC

4. Clean up

kubectl delete -f https://www.xnip.cn/doc/OiXjLrZckjcm-duplicated-label.yaml
kubectl apply -f https://www.xnip.cn/doc/OiXjLrZckjdeploy-duplicated-label.yaml

Multiple Port Service

1. Deploy multiport service

kubectl apply -f https://www.xnip.cn/doc/OiXjLrZckjdeploy-backend.yaml

https://www.xnip.cn/doc/OiXjLrZckjdeploy-backend.yaml

2. Deploy Service

kubectl apply -f https://www.xnip.cn/doc/OiXjLrZckjcm-multiport.yaml

https://www.xnip.cn/doc/OiXjLrZckjcm-multiport.yaml

3. Test the service

curl http://192.168.200.41:8081/health

4. Clean up

kubectl delete -f https://www.xnip.cn/doc/OiXjLrZckjcm-multiport.yaml
kubectl delete -f https://www.xnip.cn/doc/OiXjLrZckjdeploy-backend.yaml

Immediate Service Action down

1. Deploy Service

kubectl apply -f https://www.xnip.cn/doc/OiXjLrZckjcm-immediate-down.yaml

https://www.xnip.cn/doc/OiXjLrZckjcm-immediate-down.yaml

2. Access Service & telnet host

$ curl -o /dev/null -s -w "%{http_code}\n" http://192.168.200.41
200

$ telnet 192.168.200.41 80
Trying 192.168.200.41...
Connected to 192.168.200.41.
Escape character is '^]'.

3. Force tear down backend app, to set replica to 0, re-access Service & ping host

$ curl -o /dev/null -s -w "%{http_code}\n" http://192.168.200.41
000

$ telnet 192.168.200.41 80
Trying 192.168.200.41...
Connected to 192.168.200.41.
Escape character is '^]'.
Connection closed by foreign host.

4. Clean up

kubectl delete -f https://www.xnip.cn/doc/OiXjLrZckjcm-immediate-down.yaml