Month: April 2019

This is just quick notes on what I recently tried on OpenShift v4.0 from try.openshift.com. OpenShift uses Maistra for installing the OpenShift Service Mesh via a Kuberetes operator. OCP4 (Cluster version is 4.0.0-0.9) makes creating OpenShift Cluster so easy!

Here are the steps I used:

1. Install OpenShift. Please follow the instruction on try.openshift.com
2. Create an istio-operator project:

   • oc new-project istio-operator

   • oc process -f https://raw.githubusercontent.com/Maistra/openshift-ansible/maistra-0.9/istio/istio_community_operator_template.yaml | oc create -f -

3. Create Custom Resource as the example below and save it as cr.yaml

   • apiVersion: "istio.openshift.com/v1alpha1"
     kind: "Installation"
     metadata:
       name: "istio-installation"
       namespace: istio-operator
     spec:
       istio:
         authentication: true
         prefix: docker.io/maistra
       jaeger:
         prefix: docker.io/jaegertracing
       kiali:
         username: admin
         password: admin
         prefix: docker.io/kiali

4. Check if the operator is ready

   • oc logs <istio operator pod name> -n istio-operator

   • Output from logs:
     time="2019-04-05T06:52:41Z" level=info msg="Go Version: go1.11.5"
     time="2019-04-05T06:52:41Z" level=info msg="Go OS/Arch: linux/amd64"
     time="2019-04-05T06:52:41Z" level=info msg="operator-sdk Version: 0.0.5+git"
     time="2019-04-05T06:52:41Z" level=info msg="Metrics service istio-operator created"
     time="2019-04-05T06:52:41Z" level=info msg="Watching resource istio.openshift.com/v1alpha1, kind Installation, namespace istio-operator, resyncPeriod 0"
     time="2019-04-05T06:53:56Z" level=info msg="Installing istio for Installation istio-installation"

5. Install OpenShift service mesh via operator using the cr.yaml that was created in step #3

   • oc create -f cr.yaml -n istio-operator

6. Verify Service Mesh Installation

   • oc get pods -n istio-system

     NAME                                          READY     STATUS      RESTARTS   AGE
     elasticsearch-0                               1/1       Running     0          11h
     grafana-d5d978b4d-pj6wf                       1/1       Running     0          11h
     istio-citadel-6f7fdc6685-vbx6n                1/1       Running     0          11h
     istio-egressgateway-5458749989-5xswb          1/1       Running     0          11h
     istio-galley-58bd6d9546-6nlhv                 1/1       Running     0          11h
     istio-ingressgateway-77f9dc475b-6cx5x         1/1       Running     0          11h
     istio-pilot-6f5f59477c-7kzvr                  2/2       Running     0          11h
     istio-policy-6c574bccd8-55wwx                 2/2       Running     5          11h
     istio-sidecar-injector-7f866d4796-k6dqw       1/1       Running     0          11h
     istio-telemetry-54795dfc9c-d5cr4              2/2       Running     5          11h
     jaeger-agent-gsbk8                            1/1       Running     0          11h
     jaeger-agent-lqmx4                            1/1       Running     0          11h
     jaeger-agent-zsb9l                            1/1       Running     0          11h
     jaeger-collector-668488cff9-24p9b             1/1       Running     0          11h
     jaeger-query-57f78497d5-7ttbw                 1/1       Running     0          11h
     kiali-ddbf7d4d9-c54kf                         1/1       Running     0          11h
     openshift-ansible-istio-installer-job-vpdrl   0/1       Completed   0          11h
     prometheus-b5fb89775-x4bzd                    1/1       Running     0          11h

7.  Install the bookinfo application. Here are the steps that I used.

   • oc new-project bookinfo
     oc adm policy add-scc-to-user anyuid -z default -n bookinfo
     oc adm policy add-scc-to-user privileged -z default -n bookinfo
     oc apply -f bookinfo.yaml 
     oc apply -f bookinfo-gateway-all.yaml
     oc apply -f destination-rule-all-mtls.yaml

   • where you can find the yaml files from https://github.com/piggyvenus/ocp-istio-example/tree/master/istio-examples/bookinfo
8.  Access the bookinfo application
   • To get the host for ingressgateway route:

     • oc get route -n istio-system istio-ingressgateway -o jsonpath='{.spec.host}'
       
       output:
       istio-ingressgateway-istio-system.apps.test3-0404.sc.ocpdemo.online

1. •  Go to your browser and use your ingressgateway host as the URL similar to the one shown below.

     • http://istio-ingressgateway-istio-system.apps.test3-0404.sc.ocpdemo.online/productpage

 Observability

• Kiali Console
  • oc get route -n istio-system|grep kiali
  • use the output of the host from kiali route to access the kiali console

• Jaegar:

  • jaeger-query-istio-system.apps.test3-0404.sc.ocpdemo.online

  • use the output of the host from jaegar route to access the jaegar