[Istioc]Istio部署sock-shop时rabbitmq出现CrashLoopBackOff

　　因Istio官网自带的bookinfo服务依赖关系较少，因此想部署sock-shop进行进一步的实验。

kubectl apply -f <(istioctl kube-inject -f sockshop-demo.yaml)

　　在部署完以后，rabbitmq一直处于CrashLoopBackOff和Error的状态

　　查看状态并没有特别明显的报错

root@R740--:~# kubectl describe pod -n sock-shop rabbitmq-759fbc775f-s575d
Name:           rabbitmq-759fbc775f-s575d
Namespace:      sock-shop
Node:           192.168.199.191/192.168.199.191
Start Time:     Sun,  Sep  :: +
Labels:         name=rabbitmq
                pod-template-hash=
Annotations:    sidecar.istio.io/status={"version":"55ca84b79cb5036ec3e54a3aed83cd77973cdcbed6bf653ff7b4f82659d68b1e","initContainers":["istio-init"],"containers":["istio-proxy"],"volumes":["istio-envoy","istio-certs...
Status:         Running
IP:             172.20.5.51
Controlled By:  ReplicaSet/rabbitmq-759fbc775f
Init Containers:
  istio-init:
    Container ID:  docker://b180f64c1589c3b8aae32fbcc3dcfbcb75bc758a78c4b22b538d0fda447aee9b
    Image:         docker.io/istio/proxy_init:1.0.
    Image ID:      docker-pullable://istio/proxy_init@sha256:345c40053b53b7cc70d12fb94379e5aa0befd979a99db80833cde671bd1f9fad
    Port:          <none>
    Args:
      -p

      -u

      -m
      REDIRECT
      -i
      *
      -x

      -b
      ,
      -d

    State:          Terminated
      Reason:       Completed
      Exit Code:
      Started:      Sun,  Sep  :: +
      Finished:     Sun,  Sep  :: +
    Ready:          True
    Restart Count:
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-9lxtp (ro)
Containers:
  rabbitmq:
    Container ID:   docker://9f9062c0457bfb23d3cf8c5bbc62bff198a68dd2bbae9ef2738920650abfbe3d
    Image:          rabbitmq:3.6.
    Image ID:       docker-pullable://rabbitmq@sha256:a9f4923559bbcd00b93b02e61615aef5eb6f1d1c98db51053bab0fa6b680db26
    Port:           /TCP
    State:          Waiting
      Reason:       CrashLoopBackOff
    Last State:     Terminated
      Reason:       Error
      Exit Code:
      Started:      Sun,  Sep  :: +
      Finished:     Sun,  Sep  :: +
    Ready:          False
    Restart Count:
    Limits:
      cpu:     1024m
      memory:  1Gi
    Requests:
      cpu:
      memory:
    Environment:  <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-9lxtp (ro)
  istio-proxy:
    Container ID:  docker://d96548f938c41552450cd026eba5b7ff7915feb0cc058b8ecff3959896afed90
    Image:         docker.io/istio/proxyv2:1.0.
    Image ID:      docker-pullable://istio/proxyv2@sha256:77915a0b8c88cce11f04caf88c9ee30300d5ba1fe13146ad5ece9abf8826204c
    Port:          <none>
    Args:
      proxy
      sidecar
      --configPath
      /etc/istio/proxy
      --binaryPath
      /usr/local/bin/envoy
      --serviceCluster
      istio-proxy
      --drainDuration
      45s
      --parentShutdownDuration
      1m0s
      --discoveryAddress
      istio-pilot.istio-system:
      --discoveryRefreshDelay
      1s
      --zipkinAddress
      zipkin.istio-system:
      --connectTimeout
      10s
      --statsdUdpAddress
      istio-statsd-prom-bridge.istio-system:
      --proxyAdminPort

      --controlPlaneAuthPolicy
      NONE
    State:          Running
      Started:      Sun,  Sep  :: +
    Ready:          True
    Restart Count:
    Requests:
      cpu:  10m
    Environment:
      POD_NAME:                      rabbitmq-759fbc775f-s575d (v1:metadata.name)
      POD_NAMESPACE:                 sock-shop (v1:metadata.namespace)
      INSTANCE_IP:                    (v1:status.podIP)
      ISTIO_META_POD_NAME:           rabbitmq-759fbc775f-s575d (v1:metadata.name)
      ISTIO_META_INTERCEPTION_MODE:  REDIRECT
    Mounts:
      /etc/certs/ from istio-certs (ro)
      /etc/istio/proxy from istio-envoy (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-9lxtp (ro)
Conditions:
  Type           Status
  Initialized    True
  Ready          False
  PodScheduled   True
Volumes:
  istio-envoy:
    Type:    EmptyDir (a temporary directory that shares a pod's lifetime)
    Medium:  Memory
  istio-certs:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  istio.default
    Optional:    true
  default-token-9lxtp:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-9lxtp
    Optional:    false
QoS Class:       Burstable
Node-Selectors:  beta.kubernetes.io/os=linux
Tolerations:     <none>
Events:
  Type     Reason                 Age                 From                      Message
  ----     ------                 ----                ----                      -------
  Normal   SuccessfulMountVolume  38m                 kubelet, 192.168.199.191  MountVolume.SetUp succeeded for volume "istio-envoy"
  Normal   SuccessfulMountVolume  38m                 kubelet, 192.168.199.191  MountVolume.SetUp succeeded for volume "istio-certs"
  Normal   SuccessfulMountVolume  38m                 kubelet, 192.168.199.191  MountVolume.SetUp succeeded for volume "default-token-9lxtp"
  Normal   Scheduled              38m                 default-scheduler         Successfully assigned rabbitmq-759fbc775f-s575d to 192.168.199.191
  Normal   Started                38m                 kubelet, 192.168.199.191  Started container
  Normal   Pulled                 38m                 kubelet, 192.168.199.191  Container image "docker.io/istio/proxy_init:1.0.0" already present on machine
  Normal   Created                38m                 kubelet, 192.168.199.191  Created container
  Normal   Pulled                 38m                 kubelet, 192.168.199.191  Container image "docker.io/istio/proxyv2:1.0.0" already present on machine
  Normal   Started                38m                 kubelet, 192.168.199.191  Started container
  Normal   Created                38m                 kubelet, 192.168.199.191  Created container
  Normal   Pulled                 37m (x4 over 38m)   kubelet, 192.168.199.191  Container image "rabbitmq:3.6.8" already present on machine
  Normal   Started                37m (x4 over 38m)   kubelet, 192.168.199.191  Started container
  Normal   Created                37m (x4 over 38m)   kubelet, 192.168.199.191  Created container
  Warning  BackOff                2m (x160 over 38m)  kubelet, 192.168.199.191  Back-off restarting failed container

　　后来看istio的github的issue发现其他人也有遇到这个问题。其原因是在rabbitmq的service中没有加入epmd pod

apiVersion: v1
kind: Service
metadata:
  name: rabbitmq
  labels:
    name: rabbitmq
  namespace: sock-shop
spec:
  ports:
    # the port that this service should serve on
  - port:
    targetPort:
    name: amqp
  - port:              //4369时sock-shop的epmd默认端口
    name: epmd
  selector:
    name: rabbitmq

　　然后再apply一次就发现问题解决了