1. Prepare the springboot project
You can prepare a project on the https://start.spring.io/ website, here as k8s learning, so prepare a simple access interface in the springboot project.
2. Server environment preparation
Install Jdk
1. Update the system package:
sudo yum update
2. Install OpenJDK 11:
sudo yum install java-11-openjdk-devel
3. Verify Java installation:
java -version
4. Configure environment variables
vim /etc/profile
#JAVA_HOME 的内容根据具体安装jdk的路径替换
JAVA_HOME=/usr/lib/jvm/java-11-openjdk
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH
5. Make the environment variable take effect
source /etc/profile
Install Maven
1. You can download version 3.5.4 at https://dlcdn.apache.org/maven/maven-3/3.5.4/binaries/apache-maven-3.5.4-bin.zip website (or https://maven .apache.org/download.cgi to download the version you need), upload it to the server /usr/local/software/directory
2. Install the unzip command
yum install unzip -y
3. Unzip
unzip apache-maven-3.5.4-bin.zip
modify name
mv apache-maven-3.5.4 maven3.5
4. Configure environment variables
vim /etc/profile
JAVA_HOME=/usr/lib/jvm/java-11-openjdk
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
MAVEN_HOME=/usr/local/software/maven3.5
PATH=$PATH:$MAVEN_HOME/bin
export PATH JAVA_HOME CLASSPATH MAVEN_HOME
5. Make the environment variable take effect
source /etc/profile
3. The springboot project builds and packages docker
1. Set the package file name to demo and
set finalName in the pom file in the springboot project
2. Add the Dockerfile file, the file is placed in the project and directory under
the Dockerfile file
FROM adoptopenjdk/openjdk11:jre11u-nightly
ADD target/demo.jar demo.jar
ENTRYPOINT ["java","-jar","/demo.jar"]
3. Upload the springboot project to the server and enter the root directory for packaging
Excuting an order
mvn clean install
Build the image (don't ignore the last dot)
docker build -t demo:1.0 .
View mirror list
docker images
start up
docker run -d -it -p 8080:8080 --name=k8sdemo demo:1.0
4. Image push (Alibaba Cloud example)
Aliyun account access address
https://cr.console.aliyun.com/
The creation of the warehouse will not be described here, and Baidu (personal version does not charge)
Push private mirror warehouse
#仓库地址根据自己的地址替换
docker login --username=gq570566 registry.cn-shenzhen.aliyuncs.com
#打tag
#docker tag [ImageId] registry.cn-hangzhou.aliyuncs.com/fqfff/demo:[镜像版本号]
docker tag ba0652a92214 registry.cn-hangzhou.aliyuncs.com/fqfff/demo:1.0
#推送
#docker push registry.cn-hangzhou.aliyuncs.com/fqfff/demo:[镜像版本号]
docker push registry.cn-hangzhou.aliyuncs.com/fqfff/demo:1.0
#拉取
docker pull registry.cn-hangzhou.aliyuncs.com/fqfff/demo:[镜像版本号]
5.K8s deployment SpringBoot project
create secert
#kubectl create secret docker-registry demo-docker-secret --docker-server=registry.cn-hangzhou.aliyuncs.com --docker-username=用户名 --docker-password=登录密码
kubectl create secret docker-registry demo-docker-secret --docker-server=registry.cn-hangzhou.aliyuncs.com --docker-username=gq570566--docker-password=*****
Create the yaml file of k8sdemo-deployment
How to quickly generate yaml files
kubectl create deployment k8sdemo --image=registry.cn-hangzhou.aliyuncs.com/fqfff/demo:1.0 --dry-run=client -o yaml > demo-k8s.yaml
Modify the number of copies to 2, mount the secret
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: k8sdemo
name: k8sdemo
spec:
replicas: 2
selector:
matchLabels:
app: k8sdemo
strategy: {
}
template:
metadata:
creationTimestamp: null
labels:
app: k8sdemo
spec:
imagePullSecrets:
- name: demo-docker-secret
containers:
- image: registry.cn-hangzhou.aliyuncs.com/fqfff/demo:1.0
name: demo-k8s
resources: {
}
status: {
}
create controller
kubectl apply -f demo-k8s.yaml
Create service, nodePort type
kubectl expose deploy k8sdemo --port=8080 --target-port=8080 --type=NodePort
test access
view port
kubectl get svc
Access node ip+port+interface address
success!