Tips

    You have two containers in a pod

    From these images

    2. or
    3. kubectl get pods -o jsonpath="{.items[*].spec.containers[*].image}" -l app=customer -n tutorial

    Get the pod ids

    1. CPOD=$(oc get pods -o jsonpath='{.items[*].metadata.name}' -l app=customer -n tutorial)
    2. PPOD=$(oc get pods -o jsonpath='{.items[*].metadata.name}' -l app=preference -n tutorial)
    3. RPOD1=$(oc get pods -o jsonpath='{.items[*].metadata.name}' -l app=recommendation,version=v1 -n tutorial)
    4. RPOD2=$(oc get pods -o jsonpath='{.items[*].metadata.name}' -l app=recommendation,version=v2 -n tutorial)
    6. or
    8. CPOD=$(kubectl get pods -o jsonpath='{.items[*].metadata.name}' -l app=customer -n tutorial)
    9. PPOD=$(kubectl get pods -o jsonpath='{.items[*].metadata.name}' -l app=preference -n tutorial)
    10. RPOD1=$(kubectl get pods -o jsonpath='{.items[*].metadata.name}' -l app=recommendation,version=v1 -n tutorial)
    11. RPOD2=$(kubectl get pods -o jsonpath='{.items[*].metadata.name}' -l app=recommendation,version=v2 -n tutorial)

    The pods all see each other’s services

    1. oc exec $CPOD -c customer -n tutorial curl 
    2. oc exec $CPOD -c customer -n tutorial curl http://recommendation:8080
    3. oc exec $RPOD2 -c recommendation -n tutorial curl 
    5. or
    7. kubectl exec $CPOD -c customer -n tutorial curl http://preference:8080
    8. kubectl exec $CPOD -c customer -n tutorial curl 
    9. kubectl exec $RPOD2 -c recommendation -n tutorial curl http://customer:8080
    1. "virtualHosts": [
    2.       {
    3.        "name": "customer.tutorial.svc.cluster.local:8080",
    4.        "domains": [
    5.         "customer.tutorial.svc.cluster.local",
    6.         "customer.tutorial.svc.cluster.local:8080",
    7.         "customer",
    8.         "customer:8080",
    9.         "customer.tutorial.svc.cluster",
    10.         "customer.tutorial.svc.cluster:8080",
    11.         "customer.tutorial.svc",
    12.         "customer.tutorial.svc:8080",
    13.         "customer.tutorial",
    14.         "customer.tutorial:8080",
    15.         "172.30.107.115",
    16.         "172.30.107.115:8080"
    17.        ],
    18.        "routes": [
    19.         {
    20.          "match": {
    21.           "prefix": "/"
    22.          },
    23.          "route": {
    24.           "cluster": "outbound|8080||customer.tutorial.svc.cluster.local"
    25.          },
    26.          "decorator": {
    27.           "operation": "default-route"
    28.          }
    29.         }
    30.        ]
    31.       },
    32.        "name": "istio-pilot.istio-system.svc.cluster.local:8080",
    33.        "domains": [
    34.         "istio-pilot.istio-system.svc.cluster.local",
    35.         "istio-pilot.istio-system.svc.cluster.local:8080",
    36.         "istio-pilot.istio-system",
    37.         "istio-pilot.istio-system:8080",
    38.         "istio-pilot.istio-system.svc.cluster",
    39.         "istio-pilot.istio-system.svc.cluster:8080",
    40.         "istio-pilot.istio-system.svc",
    41.         "istio-pilot.istio-system.svc:8080",
    42.         "172.30.142.41",
    43.         "172.30.142.41:8080"
    44.        ],
    45.        "routes": [
    46.         {
    47.          "match": {
    48.           "prefix": "/"
    49.          },
    50.          "route": {
    51.           "cluster": "outbound|8080||istio-pilot.istio-system.svc.cluster.local"
    52.          },
    53.          "decorator": {
    54.           "operation": "default-route"
    55.          }
    56.         }
    57.        ]
    58.       },
    59.       {
    60.        "name": "preference.tutorial.svc.cluster.local:8080",
    61.        "domains": [
    62.         "preference.tutorial.svc.cluster.local",
    63.         "preference.tutorial.svc.cluster.local:8080",
    64.         "preference",
    65.         "preference:8080",
    66.         "preference.tutorial.svc.cluster",
    67.         "preference.tutorial.svc.cluster:8080",
    68.         "preference.tutorial.svc",
    69.         "preference.tutorial.svc:8080",
    70.         "preference.tutorial",
    71.         "preference.tutorial:8080",
    72.         "172.30.26.194",
    73.         "172.30.26.194:8080"
    74.        ],
    75.        "routes": [
    76.         {
    77.          "match": {
    78.           "prefix": "/"
    79.          },
    80.          "route": {
    81.           "cluster": "outbound|8080||preference.tutorial.svc.cluster.local"
    82.          },
    83.          "decorator": {
    84.           "operation": "default-route"
    85.          }
    87.       },
    88.       {
    89.        "name": "recommendation.tutorial.svc.cluster.local:8080",
    90.        "domains": [
    91.         "recommendation.tutorial.svc.cluster.local",
    92.         "recommendation.tutorial.svc.cluster.local:8080",
    93.         "recommendation",
    94.         "recommendation:8080",
    95.         "recommendation.tutorial.svc.cluster",
    96.         "recommendation.tutorial.svc.cluster:8080",
    97.         "recommendation.tutorial.svc",
    98.         "recommendation.tutorial.svc:8080",
    99.         "recommendation.tutorial",
    100.         "recommendation.tutorial:8080",
    101.         "172.30.103.127",
    102.         "172.30.103.127:8080"
    103.        ],
    104.        "routes": [
    105.         {
    106.          "match": {
    107.           "prefix": "/"
    108.          },
    109.          "route": {
    110.           "cluster": "outbound|8080||recommendation.tutorial.svc.cluster.local"
    111.          },
    112.          "decorator": {
    113.           "operation": "default-route"
    114.          }
    115.         }
    116.        ]
    117.       }
    118.      ],

    Now add a new destinationrule and virtualservice.

    1. istioctl create -f 
    2. istioctl create -f istiofiles/virtual-service-recommendation-v2.yml

    The review the routes again

    1. oc exec $CPOD -c customer -n tutorial curl  > bfile.json
    2. or
    3. kubectl exec $CPOD -c customer -n tutorial curl http://localhost:15000/config_dump > bfile.json

    Here is the Before:

    and

    1.             "decorator": {
    2.                 "operation": "default-route"
    3.             }
    1.             "route": {
    2.                   "cluster": "outbound|8080|version-v2|recommendation.tutorial.svc.cluster.local",
    3.               },

    and

    1.             "decorator": {
    2.                   "operation": "recommendation"
    3.              }

    If you need the Pod IP

    Dive into the istio-proxy container

    1. oc exec -it $CPOD -c istio-proxy -n tutorial /bin/bash
    2. or
    3. kubectl exec -it $CPOD -c istio-proxy -n tutorial /bin/bash
    5. cd /etc/istio/proxy
    6. ls
    7. cat envoy-rev0.json

    Snowdrop Troubleshooting