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praveenkumar/[Dont DELETE] Openshift_Operators

Created October 17, 2019 10:08
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Put the details about consumed resources by Openshift Operators.
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[Dont DELETE] Openshift_Operators
This gist thread will be used to find out what all operators are present as part of CRC and what can be done to make low
memory/cpu footprint to the host.
@praveenkumar
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praveenkumar commented Dec 20, 2019 •
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Now try to deploy the knative serving and eventing operator on this cluster.

$ cat sub.yaml 
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: knative-eventing-operator
  namespace: openshift-operators 
spec:
  channel: alpha
  name: knative-eventing-operator
  source: community-operators
  sourceNamespace: openshift-marketplace 

$ cat sub-serving.yaml 
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: knative-serving-operator
  namespace: openshift-operators 
spec:
  channel: alpha
  name: knative-serving-operator
  source: community-operators
  sourceNamespace: openshift-marketplace 

$ oc apply -f sub.yaml
$ oc apply -f sub-serving.yaml

Wait for some time and check the pods (which all are running).

$ oc get pods -A
NAMESPACE                                               NAME                                                              READY   STATUS    RESTARTS   AGE
istio-operator                                          istio-operator-86f7d5ffd8-ssmwq                                   1/1     Running   0          108m
istio-system                                            cluster-local-gateway-58758f588-wzkm2                             1/1     Running   0          106m
istio-system                                            istio-ingressgateway-54968c8854-fx97t                             1/1     Running   0          106m
istio-system                                            istio-pilot-577ff6784c-jrjjb                                      1/1     Running   0          107m
knative-eventing                                        eventing-controller-5d5f979874-96kpb                              1/1     Running   0          114m
knative-eventing                                        eventing-webhook-75bcb6d4bb-j5tml                                 1/1     Running   0          114m
knative-eventing                                        imc-controller-69c54bfdc8-pzxlr                                   1/1     Running   0          113m
knative-eventing                                        imc-dispatcher-94bc9f6b6-c2kfl                                    1/1     Running   0          113m
knative-eventing                                        sources-controller-5c6df78ffb-g9qhj                               1/1     Running   0          114m
knative-serving                                         activator-6c94b9ff47-9xwlp                                        1/1     Running   0          106m
knative-serving                                         autoscaler-64c549bcf4-lhfrx                                       1/1     Running   0          106m
knative-serving                                         controller-564487997f-mh2l2                                       1/1     Running   0          106m
knative-serving                                         knative-openshift-ingress-c7fd864df-7k6xw                         1/1     Running   0          106m
knative-serving                                         networking-certmanager-8466b656dc-ktf9d                           1/1     Running   0          106m
knative-serving                                         networking-istio-59f5c789d-9j69g                                  1/1     Running   0          106m
knative-serving                                         webhook-77ff9bd584-wwz4j                                          1/1     Running   0          106m
[...]

Try to deploy a sample service and check.

$ cat service.yaml 
apiVersion: serving.knative.dev/v1alpha1
kind: Service
metadata:
  name: helloworld-go
  namespace: default
spec:
  template:
    spec:
      containers:
        - image: gcr.io/knative-samples/helloworld-go
          env:
            - name: TARGET
              value: "Go Sample v1"

$ oc get ksvc helloworld-go
NAME            URL                                             LATESTCREATED         LATESTREADY           READY   REASON
helloworld-go   http://helloworld-go.default.apps-crc.testing   helloworld-go-lk6g9   helloworld-go-lk6g9   True    

$ curl http://helloworld-go.default.apps-crc.testing
Hello Go Sample v1!

$ oc describe node
[...]
Allocated resources:
  (Total limits may be over 100 percent, i.e., overcommitted.)
  Resource           Requests          Limits
  --------           --------          ------
  cpu                3135m (89%)       4700m (134%)
  memory             6435496192 (87%)  5140890112 (70%)
  ephemeral-storage  0 (0%)            0 (0%)
Events:
  Type    Reason                   Age                 From                         Message
  ----    ------                   ----                ----                         -------
  Normal  NodeHasSufficientMemory  49m (x37 over 20h)  kubelet, crc-rk2fc-master-0  Node crc-rk2fc-master-0 status is now: NodeHasSufficientMemory
  Normal  NodeHasNoDiskPressure    49m (x37 over 20h)  kubelet, crc-rk2fc-master-0  Node crc-rk2fc-master-0 status is now: NodeHasNoDiskPressure
  Normal  NodeHasSufficientPID     49m (x37 over 20h)  kubelet, crc-rk2fc-master-0  Node crc-rk2fc-master-0 status is now: NodeHasSufficientPID
  Normal  NodeReady                49m (x5 over 20h)   kubelet, crc-rk2fc-master-0  Node crc-rk2fc-master-0 status is now: NodeReady

Check the load on the CRC VM.

sh-4.2# chroot /host 
sh-4.4# free -h
              total        used        free      shared  buff/cache   available
Mem:          7.4Gi       4.3Gi       885Mi       248Mi       2.3Gi       3.4Gi
Swap:            0B          0B          0B

sh-4.4# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda3        30G   19G   12G  62% /
tmpfs           3.8G     0  3.8G   0% /sys/fs/cgroup
devtmpfs        3.7G     0  3.7G   0% /dev
tmpfs           3.8G   84K  3.8G   1% /dev/shm
tmpfs           3.8G  8.6M  3.8G   1% /run

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