这是一个证实可用的weblogic中间件的容器化流程。我们可以通过一键部署WLS从而直接利用在容器中运行的domain来部署应用，省去了对WLS本身的环境搭建，安装部署等环节；另外还可以集成Weblogic-Kubernetes-Operator来对domain进行日志收集分析、自动扩容、负载均衡等功能。
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首先是Weblogic的Docker部署。
请仔细阅读：https://my.oschina.net/u/3867634/blog/2246865
至此，我们已经构建了oracle/weblogic:12.2.1.3-developer镜像，为了方便后续使用，我们可以搭建Harbor本地私有镜像仓库，将次镜像push至仓库中。
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搭建Harbor仓库
请参阅：https://github.com/goharbor/harbor/blob/release-1.6.0/docs/installation_guide.md
中文版：https://blog.csdn.net/aixiaoyang168/article/details/73549898
搭建完成后，kubernetes节点中需要修改insecure-registry：
//编辑配置docker-option配置文件
vi /etc/systemd/system/docker.service.d/docker-options.conf
//在文件中添加 --insecure-registry=172.17.20.25
[Service]
Environment="DOCKER_OPTS=--insecure-registry=10.233.0.0/18 --insecure-registry=172.17.20.25 --graph=/var/lib/docker --log-opt max-size=50m --log-opt max-file=5 \
--iptables=false"
//重启docker
systemctl daemon-reload
systemctl restart docker然后，将构建好的镜像push至仓库中：
//给image打标签
docker tag oracle/weblogic:12.1.3-developer 172.17.20.25/oracle/weblogic:12.1.3-developer
//push至172.17.20.25
docker push 172.17.20.25/oracle/weblogic:12.1.3-developer现在，可以登录至http://172.17.20.25查看镜像
拉取镜像：
docker pull 172.17.20.25/oracle/weblogic:12.2.1.3-developer-
kubernetes集群中部署Weblogic
拉取docker-images代码：
$ git clone https://github.com/oracle/docker-images.git
//进入wls-k8s-domain目录
[root@localhost ~]# cd docker-images/OracleWebLogic/samples/wls-k8s-domain/
[root@localhost wls-k8s-domain]# ls
build.sh container-scripts Dockerfile k8s README.md构建wls-k8s-domain镜像：
$ docker build -t wls-k8s-domain .将镜像tag打成172.17.20.25/oracle/wls-k8s-domain:1.0后push至Harbor以方便k8s节点拉取。
再修改k8s/wls-admin.yml为如下所示：
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: admin-server
spec:
selector:
matchLabels:
app: admin-server
replicas: 1
template:
metadata:
labels:
app: admin-server
spec:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: app
operator: In
values:
- admin-server
topologyKey: "kubernetes.io/hostname"
containers:
- name: admin-server
#image修改为harbor上的名字
image: 172.17.20.25/oracle/wls-k8s-domain:1.0
imagePullPolicy: IfNotPresent
command: ["sh"]
args: ["/u01/oracle/startadmin.sh"]
readinessProbe:
httpGet:
path: /weblogic/ready
port: 8001
initialDelaySeconds: 15
timeoutSeconds: 5
ports:
- containerPort: 8001
env:
- name: WLUSER
valueFrom:
secretKeyRef:
name: wlsecret
key: username
- name: WLPASSWORD
valueFrom:
secretKeyRef:
name: wlsecret
key: password
volumeMounts:
- mountPath: /u01/wlsdomain
name: domain-home
volumes:
- name: domain-home
persistentVolumeClaim:
claimName: wlserver-pvc-1
---
apiVersion: v1
kind: Service
metadata:
name: admin-server
labels:
app: admin-server
spec:
type: NodePort
selector:
app: admin-server
ports:
- name: client
protocol: TCP
port: 8001
targetPort: 8001
nodePort: 30007
selector:
app: admin-server修改k8s/wls-stateful.yml为：
apiVersion: apps/v1beta1 # for versions before 1.6.0 use extensions/v1beta1
kind: StatefulSet
metadata:
name: managed-server
spec:
serviceName: wls-subdomain
selector:
matchLabels:
app: managed-server
replicas: 2
template:
metadata:
name: ms
labels:
app: managed-server
spec:
#将managed-server与admin-server部署在同一个node上
affinity:
podAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: app
operator: In
values:
- admin-server
topologyKey: "kubernetes.io/hostname"
subdomain: wls-subdomain
containers:
- name: managed-server
image: 172.17.20.25/oracle/wls-k8s-domain:1.0
imagePullPolicy: IfNotPresent
command: ["sh"]
args: ["/u01/oracle/startms.sh"]
readinessProbe:
httpGet:
path: /weblogic/ready
port: 8011
initialDelaySeconds: 15
timeoutSeconds: 5
ports:
- containerPort: 8011
env:
- name: JAVA_OPTIONS
value: "-Dweblogic.StdoutDebugEnabled=true"
- name: USER_MEM_ARGS
value: "-Xms64m -Xmx256m "
- name: MY_POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
- name: MY_POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: DNS_DOMAIN_NAME
value: "wls-subdomain"
- name: WLUSER
valueFrom:
secretKeyRef:
name: wlsecret
key: username
- name: WLPASSWORD
valueFrom:
secretKeyRef:
name: wlsecret
key: password
volumeMounts:
- mountPath: /u01/wlsdomain
name: domain-home
- mountPath: /u01/filestores
name: filestore-data
volumes:
- name: domain-home
persistentVolumeClaim:
claimName: wlserver-pvc-1
- name: filestore-data
persistentVolumeClaim:
claimName: wlserver-pvc-2
---
apiVersion: v1 # headless service required for statefulSet
kind: Service
metadata:
name: wls-subdomain
labels:
app: managed-server
spec:
ports:
- name: client
port: 8011
protocol: TCP
targetPort: 8011
clusterIP: None
selector:
app: managed-server
---
apiVersion: v1
kind: Service
metadata:
name: wls-service
labels:
app: managed-server
spec:
type: NodePort
ports:
- name: client
port: 8011
protocol: TCP
targetPort: 8011
nodePort: 30009
selector:
app: managed-server修改k8s/pv.yml
kind: PersistentVolume
apiVersion: v1
metadata:
name: pv1
labels:
app: wls-domain
spec:
storageClassName: manual
capacity:
storage: 10Gi
accessModes:
- ReadWriteMany
persistentVolumeReclaimPolicy: Recycle # Retain, Recycle, Delete
hostPath:
#path填上本地目录
path: "/home/oracle/pv/pv1"
#nfs:
#server:
#path:
---
kind: PersistentVolume
apiVersion: v1
metadata:
name: pv2
labels:
app: wls-domain
spec:
storageClassName: manual
capacity:
storage: 10Gi
accessModes:
- ReadWriteMany
persistentVolumeReclaimPolicy: Recycle # Retain, Recycle, Delete
hostPath:
path: "/home/oracle/pv/pv2"
#nfs:
#server:
#path:
---
kind: PersistentVolume
apiVersion: v1
metadata:
name: pv3
labels:
app: wls-domain
spec:
storageClassName: manual
capacity:
storage: 10Gi
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle # Retain, Recycle, Delete
hostPath:
path: "/home/oracle/pv/pv3"
#nfs:
#server:
#path: NOTE:hostPath下所填的目录需有777权限。
IMPORTANT：在执行创建脚本之前，必须确保有一个用户的UID和GID为1000:1000。
然后，依次执行以下命令：
$ kubectl create -f k8s/secrets.yml
$ kubectl create -f k8s/pv.yml
$ kubectl create -f k8s/pvc.yml
$ kubectl create -f k8s/wls-admin.yml
$ kubectl create -f k8s/wls-stateful.yml至此，一个带有两个managed-server的domain便创建好了。
$ kubectl get all
NAME READY STATUS RESTARTS AGE
po/admin-server-1238998015-f932w 1/1 Running 0 11m
po/managed-server-0 1/1 Running 0 11m
po/managed-server-1 1/1 Running 0 8m
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
svc/admin-server 10.102.160.123 8001:30007/TCP 11m
svc/kubernetes 10.96.0.1 443/TCP 39d
svc/wls-service 10.96.37.152 8011:30009/TCP 11m
svc/wls-subdomain None 8011/TCP 11m
NAME DESIRED CURRENT AGE
statefulsets/managed-server 2 2 11m
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
deploy/admin-server 1 1 1 1 11m
NAME DESIRED CURRENT READY AGE
rs/admin-server-1238998015 1 1 1 11m 现在可以登录http:IP:30007/console访问控制台，默认账号为：weblogic，密码为：weblogic1。
在weblogic中部署的应用访问端口为30009。
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改进
我们可以制作chart来一键安装，步骤如下：
1.创建名为hello-world的charts
helm create weblogic
2.将k8s/目录放入weblogic/templates目录下
注：helloworld程序简单，程序不需引入相关依赖，也不需要传入参数。charts提供了版本控制，引入依赖，传参等配置文件。
3.打包tar
helm package weblogic
4.在本地创建charts文件夹，并将打包的tar文件移入，生成index.yaml
mv weblogic-0.1.0.tgz charts/
helm serve --repo-path ./charts
5、安装chart
helm install weblogic