apiVersion, kind, metadata, spec, status（只读）
spec：
containers
nodeSelector
nodeName
restartPolicy:
Always, Never, OnFailure
containers：
name
image
imagePullPolicy：Always、Never、IfNotPresent
ports：
name
containerPort
livenessProbe
readinessProbe
liftcycle
ExecAction: exec
TCPSocketAction：tcpSocket
HTTPGetAction: httpGet
Pod控制器：
ReplicationController：
ReplicaSet：
Deployment：
DaemonSet：
Job：
Cronjob：
StatefulSet
TPR: Third Party Resources, 1.2+, 1.7
CDR: Custom Defined Resources, 1.8+
Operator：
ReplicaSet控制器示例：
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: myapp
namespace: default
spec:
replicas: 2
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
name: myapp-pod
labels:
app: myapp
release: canary
environment: qa
spec:
containers:
- name: myapp-container
image: ikubernetes/myapp:v1
ports:
- name: http
containerPort: 80
Deployment控制器示例：
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp-deploy
namespace: default
spec:
replicas: 3
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
labels:
app: myapp
release: canary
spec:
containers:
- name: myapp
image: ikubernetes/myapp:v2
ports:
- name: http
containerPort: 80
DaemonSet控制器示例：
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: filebeat-ds
namespace: default
spec:
selector:
matchLabels:
app: filebeat
release: stable
template:
metadata:
labels:
app: filebeat
release: stable
spec:
containers:
- name: filebeat
image: ikubernetes/filebeat:5.6.5-alpine
env:
- name: REDIS_HOST
value: redis.default.svc.cluster.local
- name: REDIS_LOG_LEVEL
value: info
master:
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 4d
liveness-httpget-pod 1/1 Running 1 1d
myapp-848b5b879b-4cd8x 1/1 Running 0 4d
myapp-848b5b879b-rt8bs 1/1 Running 0 4d
myapp-848b5b879b-wmgd8 1/1 Running 0 4d
nginx-deploy-5b595999-n52b5 1/1 Running 0 4d
pod-demo 2/2 Running 6 2d
poststart-pod 0/1 CrashLoopBackOff 29 22h
readiness-httpget-pod 1/1 Running 0 23h
[root@master manifests]# kubectl delete -f poststart-pod.yaml
[root@master manifests]# kubectl explain rs
[root@master manifests]# kubectl explain rs.spec
[root@master manifests]# kubectl explain rs.spec.template
[root@master manifests]# kubectl explain rs.spec.template.spec
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 4d
liveness-httpget-pod 1/1 Running 1 1d
myapp-848b5b879b-4cd8x 1/1 Running 0 4d
myapp-848b5b879b-rt8bs 1/1 Running 0 4d
myapp-848b5b879b-wmgd8 1/1 Running 0 4d
nginx-deploy-5b595999-n52b5 1/1 Running 0 4d
pod-demo 2/2 Running 7 3d
readiness-httpget-pod 1/1 Running 0 1d
[root@master manifests]# kubectl get deploy
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
myapp 3 3 3 3 4d
nginx-deploy 1 1 1 1 4d
[root@master manifests]# kubectl delete deploy myapp
[root@master manifests]# kubectl delete deploy nginx-deploy
[root@master manifests]# vim rs-demo.yaml
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: myapp
namespace: default
spec:
replicas: 2
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
name: myapp-pod
labels:
app: myapp
release: canary
environment: qa
spec:
containers:
- name: myapp-container
image: ikubernetes/myapp:v1
ports:
- name: http
containerPort: 80
[root@master manifests]# kubectl create -f rs-demo.yaml
[root@master manifests]# kubectl get rs
NAME DESIRED CURRENT READY AGE
myapp 2 2 2 13s
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 4d
liveness-httpget-pod 1/1 Running 1 1d
myapp-5qpr9 1/1 Running 0 5m
myapp-jbzwq 1/1 Running 0 5m
pod-demo 2/2 Running 7 3d
readiness-httpget-pod 1/1 Running 0 1d
[root@master manifests]# kubectl describe pods myapp-5qpr9
Name: myapp-5qpr9
Namespace: default
Priority: 0
PriorityClassName: <none>
Node: node02.smoke.com/172.20.0.67
Start Time: Thu, 07 May 2020 21:43:32 +0800
Labels: app=myapp
environment=qa
release=canary
Annotations: <none>
Status: Running
IP: 10.244.2.16
Controlled By: ReplicaSet/myapp
Containers:
myapp-container:
Container ID: docker://dc7def392a67797e3051b835bdc8946f3a4404a7faf63c3771a34fdceb2956bb
Image: ikubernetes/myapp:v1
Image ID: docker-pullable://ikubernetes/myapp@sha256:9c3dc30b5219788b2b8a4b065f548b922a34479577befb54b03330999d30d513
Port: 80/TCP
Host Port: 0/TCP
State: Running
Started: Thu, 07 May 2020 21:43:37 +0800
Ready: True
Restart Count: 0
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-xvxpl (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
default-token-xvxpl:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-xvxpl
Optional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 6m default-scheduler Successfully assigned default/myapp-5qpr9 to node02.smoke.com
Normal Pulled 6m kubelet, node02.smoke.com Container image "ikubernetes/myapp:v1" already present on machine
Normal Created 6m kubelet, node02.smoke.com Created container
Normal Started 6m kubelet, node02.smoke.com Started container
[root@master manifests]# curl 10.244.2.16
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 5d
liveness-httpget-pod 1/1 Running 1 2d
myapp-5qpr9 1/1 Running 0 22h
myapp-jbzwq 1/1 Running 0 22h
pod-demo 2/2 Running 10 3d
readiness-httpget-pod 1/1 Running 0 1d
[root@master manifests]# kubectl delete pods myapp-5qpr9
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 5d
liveness-httpget-pod 1/1 Running 1 2d
myapp-4kmnr 1/1 Running 0 17s
myapp-jbzwq 1/1 Running 0 22h
pod-demo 2/2 Running 10 3d
readiness-httpget-pod 1/1 Running 0 1d
[root@master manifests]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
client 1/1 Running 0 5d run=client
liveness-httpget-pod 1/1 Running 1 2d <none>
myapp-4kmnr 1/1 Running 0 2m app=myapp,environment=qa,release=canary
myapp-jbzwq 1/1 Running 0 22h app=myapp,environment=qa,release=canary
pod-demo 2/2 Running 10 3d app=myapp,tier=frontend
readiness-httpget-pod 1/1 Running 0 1d <none>
[root@master manifests]# kubectl label pods pod-demo release=canary
[root@master manifests]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
client 1/1 Running 0 5d run=client
liveness-httpget-pod 1/1 Running 1 2d <none>
myapp-jbzwq 1/1 Running 0 22h app=myapp,environment=qa,release=canary
pod-demo 2/2 Running 10 3d app=myapp,release=canary,tier=frontend
readiness-httpget-pod 1/1 Running 0 1d <none>
[root@master manifests]# kubectl delete pods pod-demo
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 5d
liveness-httpget-pod 1/1 Running 1 2d
myapp-7j7sr 1/1 Running 0 4m
myapp-jbzwq 1/1 Running 0 22h
readiness-httpget-pod 1/1 Running 0 1d
[root@master manifests]# kubectl edit rs myapp
# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: extensions/v1beta1
kind: ReplicaSet
metadata:
creationTimestamp: 2020-05-07T13:43:31Z
generation: 1
name: myapp
namespace: default
resourceVersion: "246101"
selfLink: /apis/extensions/v1beta1/namespaces/default/replicasets/myapp
uid: bd8085ae-9068-11ea-8ad3-000c2967e570
spec:
replicas: 5 #吧数量从2个改成5个
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
creationTimestamp: null
labels:
app: myapp
environment: qa
release: canary
name: myapp-pod
spec:
containers:
- image: ikubernetes/myapp:v1
imagePullPolicy: IfNotPresent
name: myapp-container
ports:
- containerPort: 80
name: http
protocol: TCP
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
dnsPolicy: ClusterFirst
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
terminationGracePeriodSeconds: 30
status:
availableReplicas: 2
fullyLabeledReplicas: 2
observedGeneration: 1
readyReplicas: 2
replicas: 2
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 5d
liveness-httpget-pod 1/1 Running 1 2d
myapp-7j7sr 1/1 Running 0 21m
myapp-cm645 1/1 Running 0 2m
myapp-fnd2q 1/1 Running 0 2m
myapp-hf52s 1/1 Running 0 2m
myapp-jbzwq 1/1 Running 0 23h
readiness-httpget-pod 1/1 Running 0 2d
[root@master manifests]# kubectl edit rs myapp
# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: extensions/v1beta1
kind: ReplicaSet
metadata:
creationTimestamp: 2020-05-07T13:43:31Z
generation: 2
labels:
app: myapp
environment: qa
release: canary
name: myapp
namespace: default
resourceVersion: "247679"
selfLink: /apis/extensions/v1beta1/namespaces/default/replicasets/myapp
uid: bd8085ae-9068-11ea-8ad3-000c2967e570
spec:
replicas: 5
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
creationTimestamp: null
labels:
app: myapp
environment: qa
release: canary
name: myapp-pod
spec:
containers:
- image: ikubernetes/myapp:v2 #将镜像从v1改为v2
imagePullPolicy: IfNotPresent
name: myapp-container
ports:
- containerPort: 80
name: http
protocol: TCP
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
dnsPolicy: ClusterFirst
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
terminationGracePeriodSeconds: 30
status:
availableReplicas: 5
fullyLabeledReplicas: 5
observedGeneration: 2
readyReplicas: 5
replicas: 5
[root@master manifests]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE
client 1/1 Running 0 6d 10.244.2.3 node02.smoke.com
liveness-httpget-pod 1/1 Running 1 3d 10.244.2.12 node02.smoke.com
myapp-7j7sr 1/1 Running 0 1d 10.244.2.18 node02.smoke.com
myapp-cm645 1/1 Running 0 1d 10.244.1.18 node01.smoke.com
myapp-fnd2q 1/1 Running 0 1d 10.244.2.19 node02.smoke.com
myapp-hf52s 1/1 Running 0 1d 10.244.1.17 node01.smoke.com
myapp-jbzwq 1/1 Running 0 2d 10.244.1.16 node01.smoke.com
readiness-httpget-pod 1/1 Running 0 3d 10.244.2.13 node02.smoke.com
[root@master manifests]# kubectl get rs -o wide
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
myapp 5 5 5 23h myapp-container ikubernetes/myapp:v2 app=myapp,release=canary
[root@master manifests]# curl 10.244.1.17 #还是v1版本，改了控制器pod资源并不会改掉，因为pod资源足额不会被重建的，只有重建的pod资源它的版本才是v2；
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
[root@master manifests]# kubectl delete pods myapp-7j7sr
[root@master manifests]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE
client 1/1 Running 0 6d 10.244.2.3 node02.smoke.com
liveness-httpget-pod 1/1 Running 1 3d 10.244.2.12 node02.smoke.com
myapp-6npts 1/1 Running 0 20s 10.244.2.20 node02.smoke.com
myapp-cm645 1/1 Running 0 1d 10.244.1.18 node01.smoke.com
myapp-fnd2q 1/1 Running 0 1d 10.244.2.19 node02.smoke.com
myapp-hf52s 1/1 Running 0 1d 10.244.1.17 node01.smoke.com
myapp-jbzwq 1/1 Running 0 2d 10.244.1.16 node01.smoke.com
readiness-httpget-pod 1/1 Running 0 3d 10.244.2.13 node02.smoke.com
[root@master manifests]# curl 10.244.2.20
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
[root@master manifests]# curl 10.244.1.18
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
[root@master manifests]# kubectl explain deploy
[root@master manifests]# kubectl explain deploy.spec
[root@master manifests]# kubectl explain deploy.spec.strategy
[root@master manifests]# kubectl explain deploy.spec.strategy.rollingUpdate
[root@master manifests]# kubectl explain deploy.spec.template
[root@master manifests]# kubectl get rs
NAME DESIRED CURRENT READY AGE
myapp 5 5 5 2d
[root@master manifests]# kubectl delete rs myapp
[root@master manifests]# vim deploy-demo.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp-deploy
namespace: default
spec:
replicas: 2
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
labels:
app: myapp
release: canary
spec:
containers:
- name: myapp
image: ikubernetes/myapp:v1
ports:
- name: http
containerPort: 80
[root@master manifests]# kubectl apply -f deploy-demo.yaml #apply即可以创建也可以更新
[root@master manifests]# kubectl get deploy
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
myapp-deploy 2 2 2 2 9m
[root@master manifests]# kubectl get rs
NAME DESIRED CURRENT READY AGE
myapp-deploy-69b47bc96d 2 2 2 10m
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 7d
liveness-httpget-pod 1/1 Running 2 4d
myapp-deploy-69b47bc96d-sftgw 1/1 Running 0 11m
myapp-deploy-69b47bc96d-zpzwn 1/1 Running 0 11m
readiness-httpget-pod 1/1 Running 0 4d
[root@master manifests]# vim deploy-demo.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp-deploy
namespace: default
spec:
replicas: 3 #把副本数改为3个
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
labels:
app: myapp
release: canary
spec:
containers:
- name: myapp
image: ikubernetes/myapp:v1
ports:
- name: http
containerPort: 80
[root@master manifests]# kubectl apply -f deploy-demo.yaml
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 7d
liveness-httpget-pod 1/1 Running 2 4d
myapp-deploy-69b47bc96d-rhnsw 1/1 Running 0 54s
myapp-deploy-69b47bc96d-sftgw 1/1 Running 0 20m
myapp-deploy-69b47bc96d-zpzwn 1/1 Running 0 20m
readiness-httpget-pod 1/1 Running 0 4d
[root@master manifests]# kubectl describe deploy myapp-deploy
Name: myapp-deploy
Namespace: default
CreationTimestamp: Sun, 10 May 2020 21:19:34 +0800
Labels: <none>
Annotations: deployment.kubernetes.io/revision=1
kubectl.kubernetes.io/last-applied-configuration={"apiVersion":"apps/v1","kind":"Deployment","metadata":{"annotations"
:{},"name":"myapp-deploy","namespace":"default"},"spec":{"replicas":3,"selector":{...
Selector: app=myapp,release=canary
Replicas: 3 desired | 3 updated | 3 total | 3 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:
Labels: app=myapp
release=canary
Containers:
myapp:
Image: ikubernetes/myapp:v1
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Progressing True NewReplicaSetAvailable
Available True MinimumReplicasAvailable
OldReplicaSets: <none>
NewReplicaSet: myapp-deploy-69b47bc96d (3/3 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal ScalingReplicaSet 21m deployment-controller Scaled up replica set myapp-deploy-69b47bc96d to 2
Normal ScalingReplicaSet 1m deployment-controller Scaled up replica set myapp-deploy-69b47bc96d to 3
[root@master manifests]# kubectl get pods -w
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 7d
liveness-httpget-pod 1/1 Running 2 4d
myapp-deploy-69b47bc96d-rhnsw 1/1 Running 0 3m
myapp-deploy-69b47bc96d-sftgw 1/1 Running 0 22m
myapp-deploy-69b47bc96d-zpzwn 1/1 Running 0 22m
readiness-httpget-pod 1/1 Running 0 4d
[root@master manifests]# kubectl get pods -l app=myapp -w
NAME READY STATUS RESTARTS AGE
myapp-deploy-69b47bc96d-rhnsw 1/1 Running 0 3m
myapp-deploy-69b47bc96d-sftgw 1/1 Running 0 23m
myapp-deploy-69b47bc96d-zpzwn 1/1 Running 0 23m
[root@master manifests]# vim deploy-demo.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp-deploy
namespace: default
spec:
replicas: 3
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
labels:
app: myapp
release: canary
spec:
containers:
- name: myapp
image: ikubernetes/myapp:v2 #将版本从v1改为v2
ports:
- name: http
containerPort: 80
[root@master manifests]# kubectl apply -f deploy-demo.yaml
[root@master manifests]# kubectl get pods -l app=myapp -w
NAME READY STATUS RESTARTS AGE
myapp-deploy-69b47bc96d-rhnsw 1/1 Running 0 3m
myapp-deploy-69b47bc96d-sftgw 1/1 Running 0 23m
myapp-deploy-69b47bc96d-zpzwn 1/1 Running 0 23m
myapp-deploy-67f6f6b4dc-8ngsn 0/1 Pending 0 0s
myapp-deploy-67f6f6b4dc-8ngsn 0/1 Pending 0 0s
myapp-deploy-67f6f6b4dc-8ngsn 0/1 ContainerCreating 0 0s
myapp-deploy-67f6f6b4dc-8ngsn 1/1 Running 0 2s
myapp-deploy-69b47bc96d-rhnsw 1/1 Terminating 0 6m
myapp-deploy-67f6f6b4dc-plxkk 0/1 Pending 0 0s
myapp-deploy-67f6f6b4dc-plxkk 0/1 Pending 0 0s
myapp-deploy-67f6f6b4dc-plxkk 0/1 ContainerCreating 0 0s
myapp-deploy-67f6f6b4dc-plxkk 1/1 Running 0 2s
myapp-deploy-69b47bc96d-sftgw 1/1 Terminating 0 26m
myapp-deploy-69b47bc96d-rhnsw 0/1 Terminating 0 6m
myapp-deploy-67f6f6b4dc-dk9r4 0/1 Pending 0 0s
myapp-deploy-67f6f6b4dc-dk9r4 0/1 Pending 0 0s
myapp-deploy-67f6f6b4dc-dk9r4 0/1 ContainerCreating 0 0s
myapp-deploy-69b47bc96d-sftgw 0/1 Terminating 0 26m
myapp-deploy-67f6f6b4dc-dk9r4 1/1 Running 0 3s
myapp-deploy-69b47bc96d-zpzwn 1/1 Terminating 0 26m
myapp-deploy-69b47bc96d-zpzwn 0/1 Terminating 0 26m
myapp-deploy-69b47bc96d-sftgw 0/1 Terminating 0 26m
myapp-deploy-69b47bc96d-sftgw 0/1 Terminating 0 26m
myapp-deploy-69b47bc96d-rhnsw 0/1 Terminating 0 6m
myapp-deploy-69b47bc96d-rhnsw 0/1 Terminating 0 6m
myapp-deploy-69b47bc96d-zpzwn 0/1 Terminating 0 26m
myapp-deploy-69b47bc96d-zpzwn 0/1 Terminating 0 26m
[root@master manifests]# kubectl get rs
NAME DESIRED CURRENT READY AGE
myapp-deploy-67f6f6b4dc 3 3 3 1m
myapp-deploy-69b47bc96d 0 0 0 27m
[root@master manifests]# kubectl get rs -o wide
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
myapp-deploy-67f6f6b4dc 3 3 3 1m myapp ikubernetes/myapp:v2 app=myapp,pod-template-hash=2392926087,
release=canary
myapp-deploy-69b47bc96d 0 0 0 27m myapp ikubernetes/myapp:v1 app=myapp,pod-template-hash=2560367528,
release=canary
[root@master manifests]# kubectl rollout --help
[root@master manifests]# kubectl rollout history --help
[root@master manifests]# kubectl rollout history deployment myapp-deploy #查看滚动历史
deployments "myapp-deploy"
REVISION CHANGE-CAUSE
1 <none>
2 <none>
[root@master manifests]# kubectl patch --help
[root@master manifests]# kubectl patch deployment myapp-deploy -p '{"spec":{"replicas":5}}' #打补丁，修改replicas副本数为5个
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 7d
liveness-httpget-pod 1/1 Running 2 4d
myapp-deploy-67f6f6b4dc-8ngsn 1/1 Running 0 7m
myapp-deploy-67f6f6b4dc-dk9r4 1/1 Running 0 7m
myapp-deploy-67f6f6b4dc-plxkk 1/1 Running 0 7m
myapp-deploy-67f6f6b4dc-sjmzl 1/1 Running 0 13s
myapp-deploy-67f6f6b4dc-wds5j 1/1 Running 0 13s
readiness-httpget-pod 1/1 Running 0 4d
[root@master manifests]# kubectl rollout --help
[root@master manifests]# kubectl rollout pause --help
[root@master manifests]# kubectl explain deploy.spec.strategy
[root@master manifests]# kubectl explain deploy.spec.strategy.rollingUpdate
[root@master manifests]# kubectl patch deployment myapp-deploy -p '{"spec":{"strategy":{"rollingUpdate":{"maxSurge":1,"maxUnavailable":0}}}}'
[root@master manifests]# kubectl describe deployment myapp-deploy
Name: myapp-deploy
Namespace: default
CreationTimestamp: Sun, 10 May 2020 21:19:34 +0800
Labels: app=myapp
release=canary
Annotations: deployment.kubernetes.io/revision=2
kubectl.kubernetes.io/last-applied-configuration={"apiVersion":"apps/v1","kind":"Deployment","metadata":{"annotations"
:{},"name":"myapp-deploy","namespace":"default"},"spec":{"replicas":3,"selector":{...
Selector: app=myapp,release=canary
Replicas: 5 desired | 5 updated | 5 total | 5 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 0 max unavailable, 1 max surge
Pod Template:
Labels: app=myapp
release=canary
Containers:
myapp:
Image: ikubernetes/myapp:v2
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Progressing True NewReplicaSetAvailable
Available True MinimumReplicasAvailable
OldReplicaSets: <none>
NewReplicaSet: myapp-deploy-67f6f6b4dc (5/5 replicas created)
Events: <none>
[root@master manifests]# kubectl set image --help
[root@master manifests]# kubectl get pods -l app=myapp -w
NAME READY STATUS RESTARTS AGE
myapp-deploy-67f6f6b4dc-8ngsn 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-dk9r4 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-plxkk 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-sjmzl 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-wds5j 1/1 Running 0 23h
[root@master manifests]# kubectl set image deployment myapp-deploy myapp=ikubernetes/myapp:v3 && kubectl rollout pause deployment myapp-deploy
#更新后暂停
[root@master manifests]# kubectl get pods -l app=myapp -w #创建完成后暂停
NAME READY STATUS RESTARTS AGE
myapp-deploy-67f6f6b4dc-8ngsn 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-dk9r4 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-plxkk 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-sjmzl 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-wds5j 1/1 Running 0 23h
myapp-deploy-6bdcd6755d-ftjst 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-ftjst 0/1 Pending 0 1s
myapp-deploy-6bdcd6755d-ftjst 0/1 ContainerCreating 0 1s
myapp-deploy-6bdcd6755d-ftjst 1/1 Running 0 7s
[root@master manifests]# kubectl rollout status deployment myapp-deploy #查看更新过程
Waiting for deployment "myapp-deploy" rollout to finish: 1 out of 5 new replicas have been updated...
[root@master manifests]# kubectl rollout --help
[root@master manifests]# kubectl rollout resume deployment myapp-deploy #继续更新
[root@master manifests]# kubectl get pods -l app=myapp -w
NAME READY STATUS RESTARTS AGE
myapp-deploy-67f6f6b4dc-8ngsn 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-dk9r4 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-plxkk 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-sjmzl 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-wds5j 1/1 Running 0 23h
myapp-deploy-6bdcd6755d-ftjst 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-ftjst 0/1 Pending 0 1s
myapp-deploy-6bdcd6755d-ftjst 0/1 ContainerCreating 0 1s
myapp-deploy-6bdcd6755d-ftjst 1/1 Running 0 7s
myapp-deploy-67f6f6b4dc-sjmzl 1/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-pp6mz 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-pp6mz 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-pp6mz 0/1 ContainerCreating 0 0s
myapp-deploy-67f6f6b4dc-sjmzl 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-sjmzl 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-sjmzl 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-sjmzl 0/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-pp6mz 1/1 Running 0 8s
myapp-deploy-67f6f6b4dc-wds5j 1/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-qcv5p 0/1 Pending 0 1s
myapp-deploy-6bdcd6755d-qcv5p 0/1 Pending 0 1s
myapp-deploy-6bdcd6755d-qcv5p 0/1 ContainerCreating 0 1s
myapp-deploy-67f6f6b4dc-wds5j 0/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-qcv5p 1/1 Running 0 4s
myapp-deploy-67f6f6b4dc-dk9r4 1/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-z2w6c 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-z2w6c 0/1 Pending 0 0s
myapp-deploy-67f6f6b4dc-wds5j 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-wds5j 0/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-z2w6c 0/1 ContainerCreating 0 1s
myapp-deploy-67f6f6b4dc-dk9r4 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-dk9r4 0/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-z2w6c 1/1 Running 0 6s
myapp-deploy-67f6f6b4dc-plxkk 1/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-9p2x5 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-9p2x5 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-9p2x5 0/1 ContainerCreating 0 0s
myapp-deploy-67f6f6b4dc-plxkk 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-plxkk 0/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-9p2x5 1/1 Running 0 6s
myapp-deploy-67f6f6b4dc-8ngsn 1/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-dk9r4 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-dk9r4 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-8ngsn 0/1 Terminating 0 23h
[root@master manifests]# kubectl rollout status deployment myapp-deploy
Waiting for deployment "myapp-deploy" rollout to finish: 1 out of 5 new replicas have been updated...
Waiting for deployment spec update to be observed...
Waiting for deployment spec update to be observed...
Waiting for deployment "myapp-deploy" rollout to finish: 1 out of 5 new replicas have been updated...
Waiting for deployment "myapp-deploy" rollout to finish: 1 out of 5 new replicas have been updated...
Waiting for deployment "myapp-deploy" rollout to finish: 2 out of 5 new replicas have been updated...
Waiting for deployment "myapp-deploy" rollout to finish: 2 out of 5 new replicas have been updated...
Waiting for deployment "myapp-deploy" rollout to finish: 2 out of 5 new replicas have been updated...
Waiting for deployment "myapp-deploy" rollout to finish: 3 out of 5 new replicas have been updated...
Waiting for deployment "myapp-deploy" rollout to finish: 3 out of 5 new replicas have been updated...
Waiting for deployment "myapp-deploy" rollout to finish: 3 out of 5 new replicas have been updated...
Waiting for deployment "myapp-deploy" rollout to finish: 4 out of 5 new replicas have been updated...
Waiting for deployment "myapp-deploy" rollout to finish: 4 out of 5 new replicas have been updated...
Waiting for deployment "myapp-deploy" rollout to finish: 4 out of 5 new replicas have been updated...
Waiting for deployment "myapp-deploy" rollout to finish: 1 old replicas are pending termination...
Waiting for deployment "myapp-deploy" rollout to finish: 1 old replicas are pending termination...
deployment "myapp-deploy" successfully rolled out
[root@master manifests]# kubectl get rs -o wide
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
myapp-deploy-67f6f6b4dc 0 0 0 23h myapp ikubernetes/myapp:v2 app=myapp,pod-template-hash=2392926087,
release=canary
myapp-deploy-69b47bc96d 0 0 0 23h myapp ikubernetes/myapp:v1 app=myapp,pod-template-hash=2560367528,
release=canary
myapp-deploy-6bdcd6755d 5 5 5 11m myapp ikubernetes/myapp:v3 app=myapp,pod-template-hash=2687823118,
release=canary
[root@master manifests]# kubectl rollout undo --help
[root@master manifests]# kubectl rollout history deployment myapp-deploy
deployments "myapp-deploy" #查看当前版本
REVISION CHANGE-CAUSE
1 <none>
2 <none>
3 <none>
[root@master manifests]# kubectl rollout undo deployment myapp-deploy --to-revision=1 #回滚到第一个版本
[root@master ~]# kubectl get pods -l app=myapp -w
NAME READY STATUS RESTARTS AGE
myapp-deploy-67f6f6b4dc-8ngsn 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-dk9r4 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-plxkk 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-sjmzl 1/1 Running 0 23h
myapp-deploy-67f6f6b4dc-wds5j 1/1 Running 0 23h
myapp-deploy-6bdcd6755d-ftjst 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-ftjst 0/1 Pending 0 1s
myapp-deploy-6bdcd6755d-ftjst 0/1 ContainerCreating 0 1s
myapp-deploy-6bdcd6755d-ftjst 1/1 Running 0 7s
myapp-deploy-67f6f6b4dc-sjmzl 1/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-pp6mz 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-pp6mz 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-pp6mz 0/1 ContainerCreating 0 0s
myapp-deploy-67f6f6b4dc-sjmzl 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-sjmzl 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-sjmzl 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-sjmzl 0/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-pp6mz 1/1 Running 0 8s
myapp-deploy-67f6f6b4dc-wds5j 1/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-qcv5p 0/1 Pending 0 1s
myapp-deploy-6bdcd6755d-qcv5p 0/1 Pending 0 1s
myapp-deploy-6bdcd6755d-qcv5p 0/1 ContainerCreating 0 1s
myapp-deploy-67f6f6b4dc-wds5j 0/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-qcv5p 1/1 Running 0 4s
myapp-deploy-67f6f6b4dc-dk9r4 1/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-z2w6c 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-z2w6c 0/1 Pending 0 0s
myapp-deploy-67f6f6b4dc-wds5j 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-wds5j 0/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-z2w6c 0/1 ContainerCreating 0 1s
myapp-deploy-67f6f6b4dc-dk9r4 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-dk9r4 0/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-z2w6c 1/1 Running 0 6s
myapp-deploy-67f6f6b4dc-plxkk 1/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-9p2x5 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-9p2x5 0/1 Pending 0 0s
myapp-deploy-6bdcd6755d-9p2x5 0/1 ContainerCreating 0 0s
myapp-deploy-67f6f6b4dc-plxkk 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-plxkk 0/1 Terminating 0 23h
myapp-deploy-6bdcd6755d-9p2x5 1/1 Running 0 6s
myapp-deploy-67f6f6b4dc-8ngsn 1/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-dk9r4 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-dk9r4 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-8ngsn 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-8ngsn 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-8ngsn 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-plxkk 0/1 Terminating 0 23h
myapp-deploy-67f6f6b4dc-plxkk 0/1 Terminating 0 23h
myapp-deploy-69b47bc96d-vkksx 0/1 Pending 0 0s
myapp-deploy-69b47bc96d-vkksx 0/1 Pending 0 0s
myapp-deploy-69b47bc96d-vkksx 0/1 ContainerCreating 0 0s
myapp-deploy-69b47bc96d-vkksx 1/1 Running 0 2s
myapp-deploy-6bdcd6755d-9p2x5 1/1 Terminating 0 6m
myapp-deploy-69b47bc96d-p9b98 0/1 Pending 0 0s
myapp-deploy-69b47bc96d-p9b98 0/1 Pending 0 0s
myapp-deploy-69b47bc96d-p9b98 0/1 ContainerCreating 0 0s
myapp-deploy-6bdcd6755d-9p2x5 0/1 Terminating 0 6m
myapp-deploy-69b47bc96d-p9b98 1/1 Running 0 3s
myapp-deploy-6bdcd6755d-z2w6c 1/1 Terminating 0 6m
myapp-deploy-69b47bc96d-mxlpg 0/1 Pending 0 0s
myapp-deploy-69b47bc96d-mxlpg 0/1 Pending 0 0s
myapp-deploy-69b47bc96d-mxlpg 0/1 ContainerCreating 0 2s
myapp-deploy-6bdcd6755d-z2w6c 0/1 Terminating 0 7m
myapp-deploy-6bdcd6755d-z2w6c 0/1 Terminating 0 7m
myapp-deploy-6bdcd6755d-z2w6c 0/1 Terminating 0 7m
myapp-deploy-69b47bc96d-mxlpg 1/1 Running 0 8s
myapp-deploy-6bdcd6755d-qcv5p 1/1 Terminating 0 7m
myapp-deploy-6bdcd6755d-9p2x5 0/1 Terminating 0 7m
myapp-deploy-69b47bc96d-9xq44 0/1 Pending 0 0s
myapp-deploy-69b47bc96d-9xq44 0/1 Pending 0 1s
myapp-deploy-6bdcd6755d-9p2x5 0/1 Terminating 0 7m
myapp-deploy-69b47bc96d-9xq44 0/1 ContainerCreating 0 1s
myapp-deploy-6bdcd6755d-qcv5p 0/1 Terminating 0 7m
myapp-deploy-6bdcd6755d-qcv5p 0/1 Terminating 0 7m
myapp-deploy-6bdcd6755d-qcv5p 0/1 Terminating 0 7m
myapp-deploy-69b47bc96d-9xq44 1/1 Running 0 4s
myapp-deploy-6bdcd6755d-pp6mz 1/1 Terminating 0 7m
myapp-deploy-69b47bc96d-v4sdf 0/1 Pending 0 0s
myapp-deploy-69b47bc96d-v4sdf 0/1 Pending 0 1s
myapp-deploy-69b47bc96d-v4sdf 0/1 ContainerCreating 0 2s
myapp-deploy-6bdcd6755d-pp6mz 0/1 Terminating 0 7m
myapp-deploy-69b47bc96d-v4sdf 1/1 Running 0 4s
myapp-deploy-6bdcd6755d-pp6mz 0/1 Terminating 0 7m
myapp-deploy-6bdcd6755d-pp6mz 0/1 Terminating 0 7m
myapp-deploy-6bdcd6755d-ftjst 1/1 Terminating 0 16m
myapp-deploy-6bdcd6755d-ftjst 0/1 Terminating 0 16m
myapp-deploy-6bdcd6755d-ftjst 0/1 Terminating 0 16m
myapp-deploy-6bdcd6755d-ftjst 0/1 Terminating 0 16m
[root@master manifests]# kubectl rollout history deployment myapp-deploy
deployments "myapp-deploy"
REVISION CHANGE-CAUSE
2 <none>
3 <none>
4 <none>
[root@master manifests]# kubectl get rs -o wide #当前工作的是v1版本
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
myapp-deploy-67f6f6b4dc 0 0 0 23h myapp ikubernetes/myapp:v2 app=myapp,pod-template-hash=2392926087,
release=canary
myapp-deploy-69b47bc96d 5 5 5 1d myapp ikubernetes/myapp:v1 app=myapp,pod-template-hash=2560367528,
release=canary
myapp-deploy-6bdcd6755d 0 0 0 20m myapp ikubernetes/myapp:v3 app=myapp,pod-template-hash=2687823118,
release=canary
[root@master manifests]# kubectl explain ds
[root@master manifests]# kubectl explain ds.spec
[root@master manifests]# cp deploy-demo.yaml ds-demo.yaml
node01:
[root@node01 ~]# docker pull ikubernetes/filebeat:5.6.5-alpine
node02:
[root@node02 ~]# docker pull ikubernetes/filebeat:5.6.5-alpine
node01:
[root@node01 ~]# docker image inspect ikubernetes/filebeat:5.6.5-alpine
master:
[root@master manifests]# kubectl explain pods.spec.containers
[root@master manifests]# kubectl explain pods.spec.containers.env
[root@master manifests]# vim ds-demo.yaml
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: myapp-ds
namespace: default
spec:
selector:
matchLabels:
app: filebeat
release: stable
template:
metadata:
labels:
app: filebeat
release: stable
spec:
containers:
- name: filebeat
image: ikubernetes/filebeat:5.6.5-alpine
env:
- name: REDIS_HOST
value: redis.default.svc.cluster.local
- name: REDIS_LOG_LEVEL
value: info
[root@master manifests]# kubectl apply -f ds-demo.yaml
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 8d
liveness-httpget-pod 1/1 Running 2 5d
myapp-deploy-69b47bc96d-9xq44 1/1 Running 0 37m
myapp-deploy-69b47bc96d-mxlpg 1/1 Running 0 38m
myapp-deploy-69b47bc96d-p9b98 1/1 Running 0 38m
myapp-deploy-69b47bc96d-v4sdf 1/1 Running 0 37m
myapp-deploy-69b47bc96d-vkksx 1/1 Running 0 38m
myapp-ds-c29sl 1/1 Running 0 34s
myapp-ds-lmx8k 1/1 Running 0 34s
readiness-httpget-pod 1/1 Running 0 5d
[root@master manifests]# kubectl logs myapp-ds-c29sl
[root@master manifests]# kubectl get pods #myapp-ds有两个，因为有两个node，不会放到master上面，因为有污点
NAME READY STATUS RESTARTS AGE
client 1/1 Running 0 8d
liveness-httpget-pod 1/1 Running 2 5d
myapp-deploy-69b47bc96d-9xq44 1/1 Running 0 39m
myapp-deploy-69b47bc96d-mxlpg 1/1 Running 0 39m
myapp-deploy-69b47bc96d-p9b98 1/1 Running 0 39m
myapp-deploy-69b47bc96d-v4sdf 1/1 Running 0 39m
myapp-deploy-69b47bc96d-vkksx 1/1 Running 0 39m
myapp-ds-c29sl 1/1 Running 0 1m
myapp-ds-lmx8k 1/1 Running 0 1m
readiness-httpget-pod 1/1 Running 0 5d
[root@master manifests]# vim ds-demo.yaml #定义两个资源
apiVersion: apps/v1
kind: Deployment
metadata:
name: redis
namespace: default
spec:
replicas: 1
selector:
matchLabels:
app: redis
role: logstor
template:
metadata:
labels:
app: redis
role: logstor
spec:
containers:
- name: redis
image: redis:4.0-alpine
ports:
- name: redis
containerPort: 6379
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: myapp-ds
namespace: default
spec:
selector:
matchLabels:
app: filebeat
release: stable
template:
metadata:
labels:
app: filebeat
release: stable
spec:
containers:
- name: filebeat
image: ikubernetes/filebeat:5.6.5-alpine
env:
- name: REDIS_HOST
value: redis.default.svc.cluster.local
- name: REDIS_LOG_LEVEL
value: info
[root@master manifests]# kubectl delete -f ds-demo.yaml
[root@master manifests]# vim vim ds-demo.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: redis
namespace: default
spec:
replicas: 1
selector:
matchLabels:
app: redis
role: logstor
template:
metadata:
labels:
app: redis
role: logstor
spec:
containers:
- name: redis
image: redis:4.0-alpine
ports:
- name: redis
containerPort: 6379
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: filebeat-ds
namespace: default
spec:
selector:
matchLabels:
app: filebeat
release: stable
template:
metadata:
labels:
app: filebeat
release: stable
spec:
containers:
- name: filebeat
image: ikubernetes/filebeat:5.6.5-alpine
env:
- name: REDIS_HOST
value: redis.default.svc.cluster.local
- name: REDIS_LOG_LEVEL
value: info
[root@master manifests]# kubectl apply -f ds-demo.yaml
[root@master manifests]# kubectl expose deployment redis --port=6379
[root@master manifests]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 15d
myapp NodePort 10.100.224.224 <none> 80:30308/TCP 9d
nginx ClusterIP 10.101.88.185 <none> 80/TCP 9d
redis ClusterIP 10.106.58.175 <none> 6379/TCP 1m
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 0/1 Error 0 10d
filebeat-ds-gwqhd 1/1 Running 2 1d
filebeat-ds-jc6cs 1/1 Running 1 1d
liveness-httpget-pod 1/1 Running 3 7d
myapp-deploy-69b47bc96d-9xq44 1/1 Running 1 2d
myapp-deploy-69b47bc96d-mxlpg 1/1 Running 1 2d
myapp-deploy-69b47bc96d-p9b98 1/1 Running 1 2d
myapp-deploy-69b47bc96d-v4sdf 1/1 Running 1 2d
myapp-deploy-69b47bc96d-vkksx 1/1 Running 1 2d
readiness-httpget-pod 1/1 Running 1 7d
redis-5b5d6fbbbd-9m5p5 1/1 Running 1 1d
[root@master manifests]# kubectl exec -it redis-5b5d6fbbbd-9m5p5 -- /bin/sh
/data # netstat -tnl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:6379 0.0.0.0:* LISTEN
tcp 0 0 :::6379 :::* LISTEN
/data # ls
/data # nslookup redis.default.svc.cluster.local
Server: 10.96.0.10
Address: 10.96.0.10:53
Name: redis.default.svc.cluster.local
Address: 10.106.58.175
/data # redis-cli -h redis.default.svc.cluster.local
redis.default.svc.cluster.local:6379> keys *
(empty list or set)
redis.default.svc.cluster.local:6379> exit
/data # exit
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 0/1 Error 0 11d
filebeat-ds-gwqhd 1/1 Running 2 1d
filebeat-ds-jc6cs 1/1 Running 1 1d
liveness-httpget-pod 1/1 Running 3 8d
myapp-deploy-69b47bc96d-9xq44 1/1 Running 1 2d
myapp-deploy-69b47bc96d-mxlpg 1/1 Running 1 2d
myapp-deploy-69b47bc96d-p9b98 1/1 Running 1 2d
myapp-deploy-69b47bc96d-v4sdf 1/1 Running 1 2d
myapp-deploy-69b47bc96d-vkksx 1/1 Running 1 2d
readiness-httpget-pod 1/1 Running 1 7d
redis-5b5d6fbbbd-9m5p5 1/1 Running 1 1d
[root@master manifests]# kubectl exec -it filebeat-ds-gwqhd -- /bin/sh
/ # ps aux
PID USER TIME COMMAND
1 root 0:17 /usr/local/bin/filebeat -e -c /etc/filebeat/filebeat.yml
15 root 0:00 /bin/sh
22 root 0:00 ps aux
/ # cat /etc/filebeat/filebeat.yml
filebeat.registry_file: /var/log/containers/filebeat_registry
filebeat.idle_timeout: 5s
filebeat.spool_size: 2048
logging.level: info
filebeat.prospectors:
- input_type: log
paths:
- "/var/log/containers/*.log"
- "/var/log/docker/containers/*.log"
- "/var/log/startupscript.log"
- "/var/log/kubelet.log"
- "/var/log/kube-proxy.log"
- "/var/log/kube-apiserver.log"
- "/var/log/kube-controller-manager.log"
- "/var/log/kube-scheduler.log"
- "/var/log/rescheduler.log"
- "/var/log/glbc.log"
- "/var/log/cluster-autoscaler.log"
symlinks: true
json.message_key: log
json.keys_under_root: true
json.add_error_key: true
multiline.pattern: '^\s'
multiline.match: after
document_type: kube-logs
tail_files: true
fields_under_root: true
output.redis:
hosts: ${REDIS_HOST:?No Redis host configured. Use env var REDIS_HOST to set host.}
key: "filebeat"
/ # printenv #查看REDIS_HOST是定义的redis服务器
REDIS_PORT=tcp://10.106.58.175:6379
KUBERNETES_PORT=tcp://10.96.0.1:443
KUBERNETES_SERVICE_PORT=443
REDIS_SERVICE_PORT=6379
REDIS_PORT_6379_TCP_ADDR=10.106.58.175
HOSTNAME=filebeat-ds-gwqhd
SHLVL=1
HOME=/root
REDIS_PORT_6379_TCP_PORT=6379
REDIS_PORT_6379_TCP_PROTO=tcp
NGINX_PORT_80_TCP=tcp://10.101.88.185:80
MYAPP_SERVICE_HOST=10.100.224.224
REDIS_PORT_6379_TCP=tcp://10.106.58.175:6379
MYAPP_SERVICE_PORT=80
MYAPP_PORT=tcp://10.100.224.224:80
TERM=xterm
KUBERNETES_PORT_443_TCP_ADDR=10.96.0.1
NGINX_SERVICE_HOST=10.101.88.185
MYAPP_PORT_80_TCP_ADDR=10.100.224.224
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
KUBERNETES_PORT_443_TCP_PORT=443
REDIS_LOG_LEVEL=info
KUBERNETES_PORT_443_TCP_PROTO=tcp
MYAPP_PORT_80_TCP_PORT=80
MYAPP_PORT_80_TCP_PROTO=tcp
NGINX_SERVICE_PORT=80
NGINX_PORT=tcp://10.101.88.185:80
KUBERNETES_PORT_443_TCP=tcp://10.96.0.1:443
KUBERNETES_SERVICE_PORT_HTTPS=443
PWD=/
MYAPP_PORT_80_TCP=tcp://10.100.224.224:80
REDIS_SERVICE_HOST=10.106.58.175
KUBERNETES_SERVICE_HOST=10.96.0.1
REDIS_HOST=redis.default.svc.cluster.local
NGINX_PORT_80_TCP_ADDR=10.101.88.185
FILEBEAT_VERSION=5.6.5
NGINX_PORT_80_TCP_PORT=80
NGINX_PORT_80_TCP_PROTO=tcp
/ # nslookup redis.default.svc.cluster.local
nslookup: can't resolve '(null)': Name does not resolve
Name: redis.default.svc.cluster.local
Address 1: 10.106.58.175 redis.default.svc.cluster.local
/ # ps aux
PID USER TIME COMMAND
1 root 0:17 /usr/local/bin/filebeat -e -c /etc/filebeat/filebeat.yml
15 root 0:00 /bin/sh
26 root 0:00 ps aux
/ # kill -1 1
[root@master manifests]# kubectl get pods
NAME READY STATUS RESTARTS AGE
client 0/1 Error 0 11d
filebeat-ds-gwqhd 1/1 Running 3 1d
filebeat-ds-jc6cs 1/1 Running 1 1d
liveness-httpget-pod 1/1 Running 3 8d
myapp-deploy-69b47bc96d-9xq44 1/1 Running 1 2d
myapp-deploy-69b47bc96d-mxlpg 1/1 Running 1 2d
myapp-deploy-69b47bc96d-p9b98 1/1 Running 1 2d
myapp-deploy-69b47bc96d-v4sdf 1/1 Running 1 2d
myapp-deploy-69b47bc96d-vkksx 1/1 Running 1 2d
readiness-httpget-pod 1/1 Running 1 7d
redis-5b5d6fbbbd-9m5p5 1/1 Running 1 1d
[root@master manifests]# kubectl exec -it redis-5b5d6fbbbd-9m5p5 -- /bin/sh #日志还是没发送过来，主要为了演示各pod间如何调用，用svc的主机名
/data # redis-cli -h redis.default.svc.cluster.local
redis.default.svc.cluster.local:6379> keys *
(empty list or set)
redis.default.svc.cluster.local:6379> exit
/data # exit
[root@master manifests]# vim ds-demo.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: redis
namespace: default
spec:
replicas: 1
selector:
matchLabels:
app: redis
role: logstor
template:
metadata:
labels:
app: redis
role: logstor
spec:
containers:
- name: redis
image: redis:4.0-alpine
ports:
- name: redis
containerPort: 6379
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: filebeat-ds
namespace: default
spec:
selector:
matchLabels:
app: filebeat
release: stable
template:
metadata:
labels:
app: filebeat
release: stable
spec:
containers:
- name: filebeat
image: ikubernetes/filebeat:5.6.5-alpine
env:
- name: REDIS_HOST
value: redis.default.svc.cluster.local
- name: REDIS_LOG_LEVEL
value: info
[root@master manifests]# kubectl get pods -l app=filebeat -o wide #这两个资源各运行在一个节点上
NAME READY STATUS RESTARTS AGE IP NODE
filebeat-ds-gwqhd 1/1 Running 3 1d 10.244.1.36 node01.smoke.com
filebeat-ds-jc6cs 1/1 Running 1 1d 10.244.2.35 node02.smoke.com
[root@master manifests]# kubectl explain ds.spec
[root@master manifests]# kubectl explain ds.spec.updateStrategy
[root@master manifests]# kubectl explain ds.spec.updateStrategy.rollingUpdate
[root@master manifests]# kubectl describe ds filebeat
Name: filebeat-ds
Selector: app=filebeat,release=stable
Node-Selector: <none>
Labels: app=filebeat
release=stable
Annotations: kubectl.kubernetes.io/last-applied-configuration={"apiVersion":"apps/v1","kind":"DaemonSet","metadata":{"annotations":{},
"name":"filebeat-ds","namespace":"default"},"spec":{"selector":{"matchLabels":{...
Desired Number of Nodes Scheduled: 2
Current Number of Nodes Scheduled: 2
Number of Nodes Scheduled with Up-to-date Pods: 2
Number of Nodes Scheduled with Available Pods: 2
Number of Nodes Misscheduled: 0
Pods Status: 2 Running / 0 Waiting / 0 Succeeded / 0 Failed
Pod Template:
Labels: app=filebeat
release=stable
Containers:
filebeat:
Image: ikubernetes/filebeat:5.6.5-alpine
Port: <none>
Host Port: <none>
Environment:
REDIS_HOST: redis.default.svc.cluster.local
REDIS_LOG_LEVEL: info
Mounts: <none>
Volumes: <none>
Events: <none>
[root@master manifests]# kubectl set image --help
[root@master manifests]# kubectl set image daemonsets filebeat-ds filebeat=ikubernetes/filebeat:5.6.6-alpine #更新版本
[root@master manifests]# kubectl get pods -w
NAME READY STATUS RESTARTS AGE
client 0/1 Error 0 11d
filebeat-ds-jc6cs 1/1 Running 1 1d
filebeat-ds-shxhs 0/1 ContainerCreating 0 14s
liveness-httpget-pod 1/1 Running 3 8d
myapp-deploy-69b47bc96d-9xq44 1/1 Running 1 2d
myapp-deploy-69b47bc96d-mxlpg 1/1 Running 1 2d
myapp-deploy-69b47bc96d-p9b98 1/1 Running 1 2d
myapp-deploy-69b47bc96d-v4sdf 1/1 Running 1 2d
myapp-deploy-69b47bc96d-vkksx 1/1 Running 1 2d
readiness-httpget-pod 1/1 Running 1 8d
redis-5b5d6fbbbd-9m5p5 1/1 Running 1 1d
filebeat-ds-shxhs 1/1 Running 0 14s
filebeat-ds-jc6cs 1/1 Terminating 1 1d
filebeat-ds-jc6cs 0/1 Terminating 1 1d
filebeat-ds-jc6cs 0/1 Terminating 1 1d
filebeat-ds-jc6cs 0/1 Terminating 1 1d
filebeat-ds-dlqxm 0/1 Pending 0 0s
filebeat-ds-dlqxm 0/1 ContainerCreating 0 1s
filebeat-ds-dlqxm 1/1 Running 0 25s
[root@master manifests]# kubectl explain pods.spec
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