DS———DaemonSet
是不需要指定副本数的，默认有几个节点就在每个节点上运行一个pod
应用场景
1.运行集群存储 daemon，例如在每个 Node 上运行 glusterd、ceph
2.在每个 Node 上运行日志收集 daemon，例如fluentd、logstash
3.在每个 Node 上运行监控 daemon，例如 Prometheus Node Exporter、collectd、
Datadog 代理、New Relic 代理，或 Ganglia gmond
和deployment只有在kind的位置不同
拷贝deployment的模板进行修改
[root@vms61 chap6-ds]# kubectl create deploy ds1 --image=nginx --dry-run=client -o yaml > ds1.yaml
[root@vms61 chap6-ds]# vi ds1.yaml
spec:
app: ds1
apiVersion: apps/v1
kind: DaemonSet
metadata:
creationTimestamp: null
labels:
app: ds1
name: ds1
spec:
selector:
matchLabels:
app: ds1
template:
metadata:
creationTimestamp: null
labels:
app: ds1
spec:
containers:
- image: nginx
imagePullPolicy: IfNotPresent
name: nginx
resources: {}
为什么只有2个ds？因为vms61这台master机器有taint污点
RS——-ReplicationController
[root@vms61 chap6-ds]# cat rc.yaml
apiVersion: v1
kind: ReplicationController
metadata:
name: rcx
spec:
replicas: 3
selector:
app: nginx
template:
metadata:
name: nginx
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
[root@vms61 chap6-ds]# kubectl apply -f rc.yaml
replicationcontroller/rcx created
[root@vms61 chap6-ds]# kubectl get pods
NAME READY STATUS RESTARTS AGE
rcx-6vdkj 1/1 Running 0 6s
rcx-72vq8 1/1 Running 0 6s
rcx-8vrx4 1/1 Running 0 6s
[root@vms61 chap6-ds]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
rcx-6vdkj 1/1 Running 0 12s 10.244.116.7 vms63 <none> <none>
rcx-72vq8 1/1 Running 0 12s 10.244.196.17 vms62 <none> <none>
rcx-8vrx4 1/1 Running 0 12s 10.244.116.22 vms63 <none> <none>
[root@vms61 chap6-ds]# kubectl get rc -o wide
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
rcx 3 3 3 36s nginx nginx app=nginx
[root@vms61 chap6-ds]# kubectl scale rc rcx --replicas=5
replicationcontroller/rcx scaled
[root@vms61 chap6-ds]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
rcx-6vdkj 1/1 Running 0 106s 10.244.116.7 vms63 <none> <none>
rcx-72vq8 1/1 Running 0 106s 10.244.196.17 vms62 <none> <none>
rcx-8vrx4 1/1 Running 0 106s 10.244.116.22 vms63 <none> <none>
rcx-rvslz 1/1 Running 0 4s 10.244.196.22 vms62 <none> <none>
rcx-vmwk8 1/1 Running 0 4s 10.244.116.21 vms63 <none> <none>RC——-ReplicaSet
[root@vms61 chap6-ds]# kubectl apply -f rs1.yaml
replicaset.apps/rs created
[root@vms61 chap6-ds]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
rs-9k4s8 1/1 Running 0 4s 10.244.196.20 vms62 <none> <none>
rs-g5wl5 1/1 Running 0 4s 10.244.116.26 vms63 <none> <none>
rs-pszg7 1/1 Running 0 4s 10.244.116.23 vms63 <none> <none>
[root@vms61 chap6-ds]# cat rs1.yaml
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: rs
labels:
app: guestbook
spec:
replicas: 3
selector:
matchLabels:
tier: frontend
template:
metadata:
labels:
app: guestbook
tier: frontend
spec:
containers:
- name: nginx
image: nginx
imagePullPolicy: IfNotPresent
[root@vms61 chap6-ds]# kubectl get rs
NAME DESIRED CURRENT READY AGE
rs 3 3 3 19s
[root@vms61 chap6-ds]# kubectl scale rs rs --replicas=10
replicaset.apps/rs scaled
[root@vms61 chap6-ds]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
rs-62nmp 1/1 Running 0 2s 10.244.116.25 vms63 <none> <none>
rs-6bn4w 0/1 ContainerCreating 0 2s <none> vms63 <none> <none>
rs-9k4s8 1/1 Running 0 35s 10.244.196.20 vms62 <none> <none>
rs-d6f62 0/1 ContainerCreating 0 2s <none> vms62 <none> <none>
rs-g5wl5 1/1 Running 0 35s 10.244.116.26 vms63 <none> <none>
rs-gc8r9 1/1 Running 0 2s 10.244.116.24 vms63 <none> <none>
rs-pszg7 1/1 Running 0 35s 10.244.116.23 vms63 <none> <none>
rs-qknnq 0/1 ContainerCreating 0 2s <none> vms62 <none> <none>
rs-v9vbx 0/1 ContainerCreating 0 2s <none> vms62 <none> <none>
rs-zvk8n 0/1 ContainerCreating 0 2s <none> vms62 <none> <none>
[root@vms61 chap6-ds]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
rs-62nmp 1/1 Running 0 45s 10.244.116.25 vms63 <none> <none>
rs-6bn4w 1/1 Running 0 45s 10.244.116.27 vms63 <none> <none>
rs-9k4s8 1/1 Running 0 78s 10.244.196.20 vms62 <none> <none>
rs-d6f62 1/1 Running 0 45s 10.244.196.29 vms62 <none> <none>
rs-g5wl5 1/1 Running 0 78s 10.244.116.26 vms63 <none> <none>
rs-gc8r9 1/1 Running 0 45s 10.244.116.24 vms63 <none> <none>
rs-pszg7 1/1 Running 0 78s 10.244.116.23 vms63 <none> <none>
rs-qknnq 1/1 Running 0 45s 10.244.196.21 vms62 <none> <none>
rs-v9vbx 1/1 Running 0 45s 10.244.196.27 vms62 <none> <none>
rs-zvk8n 1/1 Running 0 45s 10.244.196.28 vms62 <none> <none>记忆小贴士
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