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我正在运行
kubectl exec
和shell本身放入Pod中时,我可以访问Mongo / Postgres,但可以使用docker网络IP地址HOST$ kubectl exec -it my-system-mongo-54b8c75798-lptzq /bin/bash
MONGO-POD# mongo mongodb://172.17.0.6
Welcome to the MongoDB shell.
> exit
bye
MONGO-POD# mongo mongodb://my-system-mongo
MongoDB shell version v3.6.3
connecting to: mongodb://my-system-mongo
2020-01-03T02:39:55.883+0000 W NETWORK [thread1] Failed to connect to 10.96.154.36:27017 after 5000ms milliseconds, giving up.
2020-01-03T02:39:55.903+0000 E QUERY [thread1] Error: couldn't connect to server my-system-mongo:27017, connection attempt failed :
connect@src/mongo/shell/mongo.js:251:13
@(connect):1:6
exception: connect failed
MONGO-POD# ping my-system-mongo
PING my-system-mongo.default.svc.cluster.local (10.96.154.36) 56(84) bytes of data.
--- my-system-mongo.default.svc.cluster.local ping statistics ---
112 packets transmitted, 0 received, 100% packet loss, time 125365ms
NAME: mysystem-1578018793
LAST DEPLOYED: Thu Jan 2 18:33:13 2020
NAMESPACE: default
STATUS: pending-install
REVISION: 1
HOOKS:
---
# Source: mysystem/templates/tests/test-connection.yaml
apiVersion: v1
kind: Pod
metadata:
name: "my-system-test-connection"
labels:
helm.sh/chart: mysystem-0.1.0
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/version: "1.16.0"
app.kubernetes.io/managed-by: Helm
annotations:
"helm.sh/hook": test-success
spec:
containers:
- name: wget
image: busybox
command: ['wget']
args: ['my-system:']
restartPolicy: Never
MANIFEST:
---
# Source: mysystem/templates/configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: my-system-configmap
labels:
helm.sh/chart: mysystem-0.1.0
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/version: "1.16.0"
app.kubernetes.io/managed-by: Helm
data:
_lots_of_key_value_pairs: here-I-shortened-it
---
# Source: mysystem/templates/my-system-mongo-service.yaml
apiVersion: v1
kind: Service
metadata:
name: my-system-mongo
labels:
helm.sh/chart: mysystem-0.1.0
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/version: "1.16.0"
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: mongo
spec:
type: ClusterIP
ports:
- port: 27017
targetPort: 27017
protocol: TCP
name: mongo
selector:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/component: mongo
---
# Source: mysystem/templates/my-system-pg-service.yaml
apiVersion: v1
kind: Service
metadata:
name: my-system-postgres
labels:
helm.sh/chart: mysystem-0.1.0
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/version: "1.16.0"
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: postgres
spec:
type: ClusterIP
ports:
- port: 5432
targetPort: 5432
protocol: TCP
name: postgres
selector:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/component: postgres
---
# Source: mysystem/templates/my-system-restsrv-service.yaml
apiVersion: v1
kind: Service
metadata:
name: my-system-rest-server
labels:
helm.sh/chart: mysystem-0.1.0
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/version: "1.16.0"
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: rest-server
spec:
type: NodePort
ports:
#- port: 8009
# targetPort: 8009
# protocol: TCP
# name: jpda
- port: 8080
targetPort: 8080
protocol: TCP
name: http
selector:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/component: rest-server
---
# Source: mysystem/templates/my-system-mongo-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-system-mongo
labels:
helm.sh/chart: mysystem-0.1.0
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/version: "1.16.0"
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: mongo
spec:
replicas: 1
selector:
matchLabels:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/component: mongo
template:
metadata:
labels:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/component: mongo
spec:
imagePullSecrets:
- name: regcred
serviceAccountName: default
securityContext:
{}
containers:
- name: my-system-mongo-pod
securityContext:
{}
image: private.hub.net/my-system-mongo:latest
imagePullPolicy: Always
envFrom:
- configMapRef:
name: my-system-configmap
ports:
- name: "mongo"
containerPort: 27017
protocol: TCP
resources:
{}
---
# Source: mysystem/templates/my-system-pg-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-system-postgres
labels:
helm.sh/chart: mysystem-0.1.0
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/version: "1.16.0"
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: postgres
spec:
replicas: 1
selector:
matchLabels:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/component: postgres
template:
metadata:
labels:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/component: postgres
spec:
imagePullSecrets:
- name: regcred
serviceAccountName: default
securityContext:
{}
containers:
- name: mysystem
securityContext:
{}
image: private.hub.net/my-system-pg:latest
imagePullPolicy: Always
envFrom:
- configMapRef:
name: my-system-configmap
ports:
- name: postgres
containerPort: 5432
protocol: TCP
resources:
{}
---
# Source: mysystem/templates/my-system-restsrv-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-system-rest-server
labels:
helm.sh/chart: mysystem-0.1.0
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/version: "1.16.0"
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: rest-server
spec:
replicas: 1
selector:
matchLabels:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/component: rest-server
template:
metadata:
labels:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
app.kubernetes.io/component: rest-server
spec:
imagePullSecrets:
- name: regcred
serviceAccountName: default
securityContext:
{}
containers:
- name: mysystem
securityContext:
{}
image: private.hub.net/my-system-restsrv:latest
imagePullPolicy: Always
envFrom:
- configMapRef:
name: my-system-configmap
ports:
- name: rest-server
containerPort: 8080
protocol: TCP
#- name: "jpda"
# containerPort: 8009
# protocol: TCP
resources:
{}
NOTES:
1. Get the application URL by running these commands:
export POD_NAME=$(kubectl get pods --namespace default -l "app.kubernetes.io/name=mysystem,app.kubernetes.io/instance=mysystem-1578018793" -o jsonpath="{.items[0].metadata.name}")
echo "Visit http://127.0.0.1:8080 to use your application"
kubectl --namespace default port-forward $POD_NAME 8080:80
kube-proxy
在minikube中无法正常工作,但是我不确定如何解决此问题。什么时候通过journalctl将shell封装到minikube和grep中以获得代理:
# grep proxy journal.log
Jan 03 02:16:02 minikube sudo[2780]: docker : TTY=unknown ; PWD=/home/docker ; USER=root ; COMMAND=/bin/touch -d 2020-01-02 18:16:03.05808666 -0800 /var/lib/minikube/certs/proxy-client.crt
Jan 03 02:16:02 minikube sudo[2784]: docker : TTY=unknown ; PWD=/home/docker ; USER=root ; COMMAND=/bin/touch -d 2020-01-02 18:16:03.05908666 -0800 /var/lib/minikube/certs/proxy-client.key
Jan 03 02:16:15 minikube kubelet[2821]: E0103 02:16:15.423027 2821 reflector.go:156] object-"kube-system"/"kube-proxy": Failed to list *v1.ConfigMap: configmaps "kube-proxy" is forbidden: User "system:node:minikube" cannot list resource "configmaps" in API group "" in the namespace "kube-system": no relationship found between node "minikube" and this object
Jan 03 02:16:15 minikube kubelet[2821]: I0103 02:16:15.503466 2821 reconciler.go:209] operationExecutor.VerifyControllerAttachedVolume started for volume "kube-proxy-token-n78g9" (UniqueName: "kubernetes.io/secret/50fbf70b-724a-4b76-af7f-5f4b91735c84-kube-proxy-token-n78g9") pod "kube-proxy-pbs6s" (UID: "50fbf70b-724a-4b76-af7f-5f4b91735c84")
Jan 03 02:16:15 minikube kubelet[2821]: I0103 02:16:15.503965 2821 reconciler.go:209] operationExecutor.VerifyControllerAttachedVolume started for volume "xtables-lock" (UniqueName: "kubernetes.io/host-path/50fbf70b-724a-4b76-af7f-5f4b91735c84-xtables-lock") pod "kube-proxy-pbs6s" (UID: "50fbf70b-724a-4b76-af7f-5f4b91735c84")
Jan 03 02:16:15 minikube kubelet[2821]: I0103 02:16:15.530948 2821 reconciler.go:209] operationExecutor.VerifyControllerAttachedVolume started for volume "lib-modules" (UniqueName: "kubernetes.io/host-path/50fbf70b-724a-4b76-af7f-5f4b91735c84-lib-modules") pod "kube-proxy-pbs6s" (UID: "50fbf70b-724a-4b76-af7f-5f4b91735c84")
Jan 03 02:16:15 minikube kubelet[2821]: I0103 02:16:15.538938 2821 reconciler.go:209] operationExecutor.VerifyControllerAttachedVolume started for volume "kube-proxy" (UniqueName: "kubernetes.io/configmap/50fbf70b-724a-4b76-af7f-5f4b91735c84-kube-proxy") pod "kube-proxy-pbs6s" (UID: "50fbf70b-724a-4b76-af7f-5f4b91735c84")
Jan 03 02:16:15 minikube systemd[1]: Started Kubernetes transient mount for /var/lib/kubelet/pods/50fbf70b-724a-4b76-af7f-5f4b91735c84/volumes/kubernetes.io~secret/kube-proxy-token-n78g9.
Jan 03 02:16:16 minikube kubelet[2821]: E0103 02:16:16.670527 2821 configmap.go:200] Couldn't get configMap kube-system/kube-proxy: failed to sync configmap cache: timed out waiting for the condition
Jan 03 02:16:16 minikube kubelet[2821]: E0103 02:16:16.670670 2821 nestedpendingoperations.go:270] Operation for "\"kubernetes.io/configmap/50fbf70b-724a-4b76-af7f-5f4b91735c84-kube-proxy\" (\"50fbf70b-724a-4b76-af7f-5f4b91735c84\")" failed. No retries permitted until 2020-01-03 02:16:17.170632812 +0000 UTC m=+13.192986021 (durationBeforeRetry 500ms). Error: "MountVolume.SetUp failed for volume \"kube-proxy\" (UniqueName: \"kubernetes.io/configmap/50fbf70b-724a-4b76-af7f-5f4b91735c84-kube-proxy\") pod \"kube-proxy-pbs6s\" (UID: \"50fbf70b-724a-4b76-af7f-5f4b91735c84\") : failed to sync configmap cache: timed out waiting for the condition"
# grep conntrack journal.log
Jan 03 02:16:04 minikube kubelet[2821]: W0103 02:16:04.286682 2821 hostport_manager.go:69] The binary conntrack is not installed, this can cause failures in network connection cleanup.
最佳答案
让我们看一下相关的服务:
apiVersion: v1
kind: Service
metadata:
name: my-system-mongo
spec:
ports:
- port: 27017 # note typo here, see @aviator's answer
targetPort: 27017
protocol: TCP
name: mongo
selector:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
selector:
;这样可以将流量路由到具有这两个标签的任何广告连播。例如,这是一个有效的目标:
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-system-postgres
spec:
selector:
matchLabels:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
template:
metadata:
labels:
app.kubernetes.io/name: mysystem
app.kubernetes.io/instance: mysystem-1578018793
kubectl get pods
输出有点混乱,我也不会感到惊讶。
app.kubernetes.io/component: mongodb
关于kubernetes - 通过Kubernetes Services进行的基本网络在Minikube中不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59572721/
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