创建资源对象实例
Posted jevonwei
tags:
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创建资源对象实例
创建namespaces
root@master1:/k8s-data/yaml/namespaces# pwd
/k8s-data/yaml/namespaces
root@master1:/k8s-data/yaml/namespaces# cat danran-ns.yml
apiVersion: v1 #API版本
kind: Namespace #类型为namespac
metadata: #定义元数据
name: danran
root@master1:/k8s-data/yaml/namespaces# kubectl apply -f danran-ns.yml
namespace/danran created
root@master1:/k8s-data/yaml/namespaces# cat jevon-ns.yml
apiVersion: v1 #API版本
kind: Namespace #类型为namespac
metadata: #定义元数据
name: jevon
root@master1:/k8s-data/yaml/namespaces# kubectl apply -f jevon-ns.yml
namespace/jevon created
danran和jevon两个namespaces已创建
root@master1:/k8s-data/yaml/namespaces# kubectl get ns
NAME STATUS AGE
danran Active 97s
default Active 26h
jevon Active 3s
kube-node-lease Active 26h
kube-public Active 26h
kube-system Active 26h
kubernetes-dashboard Active 23h
Rc/Rs/Deployment
Replication Controller：副本控制器（selector = !=）
ReplicaSet：副本控制集，和副本控制器的区别是：对选择器的支 持（selector 还支持in notin）
Deployment：比rs更高一级的控制器，除了有rs的功能之外，还 有很多高级功能,，比如说最重要的：滚动升级、回滚等
https://kubernetes.io/zh/docs/concepts/workloads/controllers/deployment/
deployment创建controllers
root@master1:/k8s-data/yaml/danran/case1# cat deployment.yml
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
namespace: danran
spec:
replicas: 2
selector:
#app: ng-deploy-80 #rc
#matchLabels: #rs or deployment
# app: ng-deploy-80
matchExpressions:
- {key: app, operator: In, values: [ng-deploy-80,ng-rs-81]}
template:
metadata:
labels:
app: ng-deploy-80
spec:
containers:
- name: ng-deploy-80
image: harbor.linux.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
root@master1:/k8s-data/yaml/danran/case1# kubectl apply -f deployment.yml
deployment.apps/nginx-deployment configured
root@master1:/kubernetes# kubectl get pod -n danran
NAME READY STATUS RESTARTS AGE
nginx-deployment-6fd69d55d4-6dmlc 1/1 Running 0 7s
nginx-deployment-6fd69d55d4-rjwq2 1/1 Running 0 4s
查看指定容器的controler
root@master1:/kubernetes# kubectl describe pod nginx-deployment-6fd69d55d4-rjwq2 -n danran
root@master1:/k8s-data/yaml/danran/case1# kubectl delete -f deployment.yml
deployment.apps "nginx-deployment" deleted
ReplicationController创建controllers
root@master1:/k8s-data/yaml/danran/case1# cat rc.yml
apiVersion: v1
kind: ReplicationController
metadata:
name: ng-rc
namespace: danran
spec:
replicas: 2
selector:
app: ng-rc-80
#app1: ng-rc-81
template:
metadata:
labels:
app: ng-rc-80
#app1: ng-rc-81
spec:
containers:
- name: ng-rc-80
image: harbor.linux.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
root@master1:/k8s-data/yaml/danran/case1# kubectl apply -f rc.yml
replicationcontroller/ng-rc created
root@master1:/kubernetes# kubectl get pod -n danran
NAME READY STATUS RESTARTS AGE
ng-rc-28pml 1/1 Running 0 24s
ng-rc-ltfk9 1/1 Running 0 24s
root@master1:/k8s-data/yaml/danran/case1# kubectl delete -f rc.yml
replicationcontroller "ng-rc" deleted
ReplicaSet创建controllers
root@master1:/k8s-data/yaml/danran/case1# cat rs.yml
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: frontend
namespace: danran
spec:
replicas: 3
selector:
#matchLabels:
# app: ng-rs-80
matchExpressions:
- {key: app, operator: In, values: [ng-rs-80,ng-rs-81]}
template:
metadata:
labels:
app: ng-rs-80
spec:
containers:
- name: ng-rs-80
image: harbor.linux.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
root@master1:/k8s-data/yaml/danran/case1# kubectl apply -f rs.yml
replicaset.apps/frontend created
root@master1:/kubernetes# kubectl get pod -n danran
NAME READY STATUS RESTARTS AGE
frontend-4zd77 1/1 Running 0 9m1s
frontend-drqts 1/1 Running 0 9m1s
frontend-wfqcq 1/1 Running 0 9m1s
查看指定容器的controler
root@master1:/kubernetes# kubectl describe pod frontend-wfqcq -n danran
创建Service
创建controller
root@master1:/k8s-data/yaml/danran/case2# cat 1-deploy_node.yml
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
namespace: danran
spec:
replicas: 1
selector:
#matchLabels: #rs or deployment
# app: ng-deploy3-80
matchExpressions:
- {key: app, operator: In, values: [ng-deploy-80,ng-rs-81]}
template:
metadata:
labels:
app: ng-deploy-80
spec:
containers:
- name: ng-deploy-80
image: harbor.linux.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
#nodeSelector:
# env: group1
root@master1:/k8s-data/yaml/danran/case2# kubectl apply -f 1-deploy_node.yml
deployment.apps/nginx-deployment created
root@master1:/kubernetes# kubectl get pod -n danran
NAME READY STATUS RESTARTS AGE
nginx-deployment-6f48df4946-vp5ph 1/1 Running 0 19s
创建service(不与外部网络通信)
root@master1:/k8s-data/yaml/danran/case2# cat 2-svc_service.yml
apiVersion: v1
kind: Service
metadata:
name: ng-deploy-80
namespace: danran
spec:
ports:
- name: http
port: 80
targetPort: 80
protocol: TCP
type: ClusterIP
selector:
app: ng-deploy-80
root@master1:/k8s-data/yaml/danran/case2# kubectl apply -f 2-svc_service.yml
service/ng-deploy-80 created
root@master1:/kubernetes# kubectl get service -n danran
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ng-deploy-80 ClusterIP 172.16.224.0 <none> 80/TCP 100s
创建测试容器busybox
root@master1:/k8s-data/yaml/danran/case2# cat busybox.yaml
apiVersion: v1
kind: Pod
metadata:
name: busybox
namespace: danran #default namespace的DNS
spec:
containers:
- image: harbor.linux.com/baseimages/busybox
command:
- sleep
- "3600"
imagePullPolicy: Always
name: busybox
restartPolicy: Always
root@master1:/k8s-data/yaml/danran/case2# kubectl apply -f busybox.yaml
pod/busybox created
在busybox容器中测试网络是否与创建的ng-deploy-80 service 互通
root@master1:/kubernetes# kubectl get pod -n danran
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 0 35s
nginx-deployment-6f48df4946-vp5ph 1/1 Running 0 14m
容器中可以正常解析service ng-deploy-80
root@master1:/kubernetes# kubectl exec -it busybox sh -n danran
/ # ping ng-deploy-80
PING ng-deploy-80 (172.16.224.0): 56 data bytes
创建service(与外部网络通信)
root@master1:/k8s-data/yaml/danran/case2# cat 3-svc_NodePort.yml
apiVersion: v1
kind: Service
metadata:
name: ng-deploy-80
namespace: danran
spec:
ports:
- name: http
port: 81
targetPort: 80
nodePort: 30012
protocol: TCP
type: NodePort
selector:
app: ng-deploy-80
root@master1:/k8s-data/yaml/danran/case2# kubectl apply -f 3-svc_NodePort.yml
service/ng-deploy-80 created
root@master1:/kubernetes# kubectl get service -n danran
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ng-deploy-80 NodePort 172.16.206.246 <none> 81:30012/TCP 21s
通过在浏览器中，访问node或master节点的30012端口，即可访问ng-deploy-80 Nginx Controller对应的Pod
Volume
https://kubernetes.io/zh/docs/concepts/storage/
- emptyDir：本地临时卷
- hostPath：本地卷
- nfs等：共享卷
- configmap: 配置文件
emptyDir
当 Pod 被分配给节点时，首先创建 emptyDir 卷，并且只要该 Pod 在该节点上运行，该卷就会存在。正如卷的名字所述，它最初是 空的。Pod 中的容器可以读取和写入 emptyDir 卷中的相同文件， 尽管该卷可以挂载到每个容器中的相同或不同路径上。当出于任 何原因从节点中删除 Pod 时，emptyDir 中的数据将被永久删除
root@master1:/k8s-data/yaml/danran/case3# cat deploy_empty.yml
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
namespace: danran
spec:
replicas: 1
selector:
matchLabels: #rs or deployment
app: ng-deploy-80
template:
metadata:
labels:
app: ng-deploy-80
spec:
containers:
- name: ng-deploy-80
image: harbor.linux.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
volumeMounts:
- mountPath: /cache
name: cache-volume
volumes:
- name: cache-volume
emptyDir: {}
root@master1:/k8s-data/yaml/danran/case3# kubectl apply -f deploy_empty.yml
deployment.apps/nginx-deployment created
在容器中生成部分数据
root@master1:/kubernetes# kubectl get pod -n danran
NAME READY STATUS RESTARTS AGE
nginx-deployment-764876fc9f-dkjfq 1/1 Running 0 3m22s
root@master1:/kubernetes# kubectl exec -it nginx-deployment-764876fc9f-dkjfq bash -n danran
root@nginx-deployment-764876fc9f-dkjfq:/# cd /cache/
root@nginx-deployment-764876fc9f-dkjfq:/cache# ls
root@nginx-deployment-764876fc9f-dkjfq:/cache# echo 123 > danran.txt
root@nginx-deployment-764876fc9f-dkjfq:/cache# ls
danran.txt
查看容器所在node节点上的目录是否有数据生成
查看容器所在的node节点
root@master1:/k8s-data/yaml/danran/case3# kubectl get pod -n danran -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-deployment-764876fc9f-dkjfq 1/1 Running 0 6m6s 10.10.4.11 node2.linux.com <none> <none>
root@node2:~# find / -name danran.txt
/var/lib/kubelet/pods/eeacb4cb-f694-4f19-a31d-73628c26f2d6/volumes/kubernetes.io~empty-dir/cache-volume/danran.txt
root@node2:~# cat /var/lib/kubelet/pods/eeacb4cb-f694-4f19-a31d-73628c26f2d6/volumes/kubernetes.io~empty-dir/cache-volume/danran.txt
123
hostPath
hostPath 卷将主机节点的文件系统中的文件或目录挂载到集群中， pod删除的时候，卷不会被删除
root@master1:/k8s-data/yaml/danran/case4# cat deploy_hostPath.yml
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
namespace: danran
spec:
replicas: 1
selector:
matchLabels:
app: ng-deploy-80
template:
metadata:
labels:
app: ng-deploy-80
spec:
containers:
- name: ng-deploy-80
image: harbor.linux.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
volumeMounts:
- mountPath: /data/mysql
name: data-volume
volumes:
- name: data-volume
hostPath:
path: /data/mysql
root@master1:/k8s-data/yaml/danran/case4# kubectl apply -f deploy_hostPath.yml
deployment.apps/nginx-deployment created
root@master1:/kubernetes# kubectl get pod -n danran
NAME READY STATUS RESTARTS AGE
nginx-deployment-68b7cf75b8-jlbpd 1/1 Running 0 31s
在容器中生成数据测试
root@master1:/kubernetes# kubectl get pod -n danran
NAME READY STATUS RESTARTS AGE
nginx-deployment-68b7cf75b8-jlbpd 1/1 Running 0 31s
必须在mountPath路径下数据才能与宿主机同步
root@master1:/kubernetes# kubectl exec -it nginx-deployment-68b7cf75b8-jlbpd bash -n danran
root@nginx-deployment-68b7cf75b8-jlbpd:/#
root@nginx-deployment-68b7cf75b8-jlbpd:/# cd /data/mysql/
root@nginx-deployment-68b7cf75b8-jlbpd:/data/mysql# mkdir logs
root@nginx-deployment-68b7cf75b8-jlbpd:/data/mysql# cd logs/
root@nginx-deployment-68b7cf75b8-jlbpd:/data/mysql/logs# echo 12345qaz > a.txt
root@nginx-deployment-68b7cf75b8-jlbpd:/data/mysql/logs# pwd
/data/mysql/logs
在容器所在的宿主机上查看是否有数据
查看pod所在的宿主机
root@master1:/k8s-data/yaml/danran/case4# kubectl get pod -n danran -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-deployment-68b7cf75b8-jlbpd 1/1 Running 0 3m4s 10.10.4.12 node2.linux.com <none> <none>
root@node2:~# ls /data/mysql/
logs
root@node2:~# cat /data/mysql/logs/a.txt
12345qaz
nfs共享存储
nfs 卷允许将现有的 NFS（网络文件系统）共享挂载到您的容器中。 不像 emptyDir，当删除 Pod 时，nfs 卷的内容被保留，卷仅仅是 被卸载。这意味着 NFS 卷可以预填充数据，并且可以在 pod 之间 “切换”数据。 NFS 可以被多个写入者同时挂载。
准备nfs服务器(10.203.124.237)
root@ha1:~# apt install nfs-server
将/data/k8sdata 目录共享给其他主机
root@ha1:~# cat /etc/exports
/data/k8sdata *(rw,no_root_squash)
/data/danran *(rw,no_root_squash)
root@ha1:~# mkdir /data/k8sdata -p
root@ha1:~# mkdir /data/danran -p
root@ha1:~# systemctl restart nfs-server
root@ha1:~# systemctl enable nfs-server
root@ha1:/data/k8sdata# cat index.html
web server
配置pod使用nfs挂载
root@master1:/k8s-data/yaml/danran/case5# cat deploy_nfs2.yml
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment-site2
spec:
replicas: 1
selector:
matchLabels:
app: ng-deploy-81
template:
metadata:
labels:
app: ng-deploy-81
spec:
containers:
- name: ng-deploy-81
image: harbor.linux.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
volumeMounts:
- mountPath: /usr/share/nginx/html/mysite
name: my-nfs-volume
volumes:
- name: my-nfs-volume
nfs:
server: 10.203.124.237
path: /data/k8sdata
---
apiVersion: v1
kind: Service
metadata:
name: ng-deploy-81
spec:
ports:
- name: http
port: 80
targetPort: 80
nodePort: 30017
protocol: TCP
type: NodePort
selector:
app: ng-deploy-81
root@master1:/k8s-data/yaml/danran/case5# kubectl apply -f deploy_nfs2.yml
deployment.apps/nginx-deployment-site2 created
service/ng-deploy-81 created
root@master1:/kubernetes# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-7b466bcdb8-sbkqt 1/1 Running 0 44h
nginx-deployment-site2-685f87bf5c-vxztk 1/1 Running 0 81s
tomcat-deployment-567999ddc-wrv5v 1/1 Running 0 43h
进入容器内查看nfs挂载目录
root@master1:/kubernetes# kubectl exec -it nginx-deployment-site2-685f87bf5c-vxztk bash
root@nginx-deployment-site2-685f87bf5c-vxztk:/# df
Filesystem 1K-blocks Used Available Use% Mounted on
overlay 20961280 3208024 17753256 16% /
tmpfs 65536 0 65536 0% /dev
tmpfs 4084052 0 4084052 0% /sys/fs/cgroup
/dev/mapper/vg00-rootvol 20961280 3208024 17753256 16% /etc/hosts
shm 65536 0 65536 0% /dev/shm
10.203.124.237:/data/k8sdata 20961280 2511872 18449408 12% /usr/share/nginx/html/mysite
tmpfs 4084052 12 4084040 1% /run/secrets/kubernetes.io/serviceaccount
tmpfs 4084052 0 4084052 0% /proc/acpi
tmpfs 4084052 0 4084052 0% /proc/scsi
tmpfs 4084052 0 4084052 0% /sys/firmware
root@nginx-deployment-site2-685f87bf5c-vxztk:/# cat /usr/share/nginx/html/mysite/index.html
web server
浏览器访问nginx，测试数据是否为nfs目录的数据
在pod所在的node上确认是否挂载了nfs目录
root@master1:/usr/local/src/kubeadm/nginx# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-7b466bcdb8-sbkqt 1/1 Running 0 44h 10.10.4.2 node2.linux.com <none> <none>
nginx-deployment-site2-685f87bf5c-t8wsb 1/1 Running 0 46s 10.10.3.12 node1.linux.com <none> <none>
tomcat-deployment-567999ddc-wrv5v 1/1 Running 0 43h 10.10.4.3 node2.linux.com <none> <none>
在同一个pod中挂载多个nfs目录
root@master1:/k8s-data/yaml/danran/case5# cat deploy_nfs.yml
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment-site
spec:
replicas: 1
selector:
matchLabels:
app: ng-deploy-80
template:
metadata:
labels:
app: ng-deploy-80
spec:
containers:
- name: ng-deploy-80
image: harbor.linux.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
volumeMounts:
- mountPath: /usr/share/nginx/html/mysite
name: my-nfs-volume
- mountPath: /data/danran
name: danran-nfs-volume
volumes:
- name: my-nfs-volume
nfs:
server: 10.203.124.237
path: /data/k8sdata
- name: danran-nfs-volume
nfs:
server: 10.203.124.237
path: /data/danran
---
apiVersion: v1
kind: Service
metadata:
name: ng-deploy-80
spec:
ports:
- name: http
port: 80
targetPort: 80
nodePort: 30016
protocol: TCP
type: NodePort
selector:
app: ng-deploy-80
root@master1:/k8s-data/yaml/danran/case5# kubectl apply -f deploy_nfs.yml
deployment.apps/nginx-deployment-site created
service/ng-deploy-80 unchanged
在pod和pod所在的node中，确认是否否挂载了两个nfs目录
root@master1:/kubernetes# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-7b466bcdb8-sbkqt 1/1 Running 0 44h 10.10.4.2 node2.linux.com <none> <none>
nginx-deployment-site-6d55cc99d6-vxcqc 1/1 Running 0 105s 10.10.4.14 node2.linux.com <none> <none>
tomcat-deployment-567999ddc-wrv5v 1/1 Running 0 43h 10.10.4.3 node2.linux.com <none> <none>
root@master1:/kubernetes# kubectl exec -it nginx-deployment-site-6d55cc99d6-vxcqc sh
Configmap
基于配置文件ConfigMap
配置Configmap 的yml文件
root@master1:/k8s-data/yaml/danran/case6# cat deploy_configmap.yml
apiVersion: v1
kind: ConfigMap
metadata:
name: nginx-config
data:
default: |
server {
listen 80;
server_name www.mysite.com;
index index.html;
location / {
root /data/nginx/html;
if (!-e $request_filename) {
rewrite ^/(.*) /index.html last;
}
}
}
---
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
spec:
replicas: 1
selector:
matchLabels:
app: ng-deploy-80
template:
metadata:
labels:
app: ng-deploy-80
spec:
containers:
- name: ng-deploy-80
image: harbor.linux.com/baseimages/nginx:1.14.2
ports:
- containerPort: 80
volumeMounts:
- mountPath: /data/nginx/html
name: nginx-static-dir
- name: nginx-config
mountPath: /etc/nginx/conf.d
volumes:
- name: nginx-static-dir
hostPath:
path: /data/nginx/danran
- name: nginx-config
configMap:
name: nginx-config
items:
- key: default
path: mysite.conf
---
apiVersion: v1
kind: Service
metadata:
name: ng-deploy-80
spec:
ports:
- name: http
port: 81
targetPort: 80
nodePort: 30019
protocol: TCP
type: NodePort
selector:
app: ng-deploy-80
创建pod
root@master1:/k8s-data/yaml/danran/case6# kubectl apply -f deploy_configmap.yml
configmap/nginx-config created
deployment.apps/nginx-deployment created
service/ng-deploy-80 created
root@master1:/kubernetes# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-7b466bcdb8-sbkqt 1/1 Running 0 46h 10.10.4.2 node2.linux.com <none> <none>
nginx-deployment-64b664464f-k4j5p 1/1 Running 0 64s 10.10.3.13 node1.linux.com <none> <none>
tomcat-deployment-567999ddc-wrv5v 1/1 Running 0 45h 10.10.4.3 node2.linux.com <none> <none>
root@master1:/kubernetes# kubectl get service -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
danran-nginx-service NodePort 172.16.175.123 <none> 80:30004/TCP 46h app=nginx
danran-tomcat-service NodePort 172.16.218.15 <none> 80:31794/TCP 45h app=tomcat
kubernetes ClusterIP 172.16.0.1 <none> 443/TCP 2d <none>
ng-deploy-80 NodePort 172.16.135.46 <none> 81:30019/TCP 83s app=ng-deploy-80
确认pod中是否有/etc/nginx/conf.d/mysite.conf配置文件
root@nginx-deployment-64b664464f-k4j5p:/# cat /etc/nginx/conf.d/mysite.conf
server {
listen 80;
server_name www.mysite.com;
index index.html;
location / {
root /data/nginx/html;
if (!-e $request_filename) {
rewrite ^/(.*) /index.html last;
}
}
}
基于env ConfigMap
root@master1:/k8s-data/yaml/danran/case6# cat deploy_configmapenv.yml
apiVersion: v1
kind: ConfigMap
metadata:
name: nginx-config
data:
username: user1
---
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
spec:
replicas: 1
selector:
matchLabels:
app: ng-deploy-80
template:
metadata:
labels:
app: ng-deploy-80
spec:
containers:
- name: ng-deploy-80
image: harbor.linux.com/baseimages/nginx:1.14.2
env:
- name: MY_USERNAME
valueFrom:
configMapKeyRef:
name: nginx-config
key: username
ports:
- containerPort: 80
DaemonSet
https://kubernetes.io/zh/docs/concepts/workloads/controllers/daemonset/
root@master1:/k8s-data/yaml/danran# vim daemonset.yml
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: fluentd-elasticsearch
namespace: kube-system
labels:
k8s-app: fluentd-logging
spec:
selector:
matchLabels:
name: fluentd-elasticsearch
template:
metadata:
labels:
name: fluentd-elasticsearch
spec:
tolerations:
# this toleration is to have the daemonset runnable on master nodes
# remove it if your masters can‘t run pods
- key: node-role.kubernetes.io/master
effect: NoSchedule
containers:
- name: fluentd-elasticsearch
image: quay.io/fluentd_elasticsearch/fluentd:v2.5.2
resources:
limits:
memory: 200Mi
requests:
cpu: 100m
memory: 200Mi
volumeMounts:
- name: varlog
mountPath: /var/log
- name: varlibdockercontainers
mountPath: /var/lib/docker/containers
readOnly: true
terminationGracePeriodSeconds: 30
volumes:
- name: varlog
hostPath:
path: /var/log
- name: varlibdockercontainers
hostPath:
path: /var/lib/docker/containers
root@master1:/k8s-data/yaml/danran# kubectl apply -f daemonset.yaml
Statefulset
https://kubernetes.io/zh/docs/concepts/workloads/controllers/statefulset/
- Why：为了解决有状态服务的问题
- What：它所管理的Pod拥有固定的Pod名称，主机名，启停顺序
- How： 创建一个statefulset类型的pod，并指定serviceName，创建headless类型的svc
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