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This article mainly explains "how Kubernetes deploys ReplicationController multi-copy load balance". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how Kubernetes deploys ReplicationController multi-copy load balance".

1. Make image

Java basic image:

FROM dockerimages.yinnut.com:15043/centos:7MAINTAINER xuelun-infra morgan.wu@yinnnut.com ADD jdk-8u60-linux-x64.tar.gz / usr/local/ENV JAVA_HOME/ usr/local/jdk1.8.0_60ENV PATH $JAVA_HOME/bin:$PATH

Friend-Service image:

FROM dockerimages.yinnut.com:15043/yinnut-java:0.1MAINTAINER xuelun-infra morgan.wu@yinnnut.com ADD FriendService.war / ADD jetty-runner.jar / WORKDIR / VOLUME ["/ var/log"] 2. Create Replication Controller

Rc.yaml file, create 2 pod of friend, set replicas to 2

ApiVersion: v1kind: ReplicationControllermetadata: name: friend-servicespec: replicas: 2 template: metadata: labels: yinnut-svc: "friend" version: "0.1" spec: containers:-name: friend-service image: dockerimages.yinnut.com:15043/friend-service:0.1 ports:-containerPort: 9999 protocol: TCP command: ["java" ] args: ["- jar" "jetty-runner.jar", "- port", "9999", "--log", "jetty.log", "FriendService.war"]

# # 3. Create a Service## svc.yaml file to listen on the 127.0.0.130001 port of the local physical machine

ApiVersion: v1kind: Servicemetadata: name: friendsvc labels: yinnut-svc: friendspec: type: NodePort ports:-port: 9999 protocol: TCP targetPort: 9999 name: http nodePort: 30001 selector: yinnut-svc: friend

# # 4. Set up Nginx reverse proxy # # install:

Yum install-y http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpmyum install nginx-y

Configuration / etc/nginx/conf.d/default.conf

Server {listen 30000; server_name localhost; location / {port_in_redirect on; proxy_pass http://127.0.0.1:30001; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;}}

Set the number of worker to 10 and add port 30000 to the firewall exception. Just access the http://192.168.1.221:30000 port.

# # 5. Test # # you can see the Pod with two Friend

[root@centos7-node-221 ~] $kubectl get poNAME READY STATUS RESTARTS AGEbusybox 1 kubectl get poNAME READY STATUS RESTARTS AGEbusybox 1 Running 296 12dfriend-service-38riq 1 Running 0 6hfriend-service-nn0qt 1/1 Running 0 11m

Send 4 requests. In fact, I sent thousands of requests, afraid I can't write it down here.

[root@centos7-node-221 ~] $for i in {1.. 4}; do time curl http://192.168.1.221:30000/user/1/friend; Done {"rc": 0, "val": [{"friendUserId": 2, "friendUserName": "who", "close": false}]} real 0m0.029suser 0m0.004ssys 0m0.003s {"rc": 0, "val": [{"friendUserId": 2, "friendUserName": "who", "close": false}]} real 0m0.039suser 0m0.001ssys 0m0.004s {"rc": 0, "val": [{"friendUserId": 2, "friendUserName": "who" "close": false}} real 0m0.028suser 0m0.002ssys 0m0.004s {"rc": 0, "val": [{"friendUserId": 2, "friendUserName": "who", "close": false}]} real 0m0.035suser 0m0.003ssys 0m0.002s

2 Pod each 2 Response, multi-copy RR load balancing works very well.

# first Pod172.16.91.0-- [11/Oct/2015:12:33:51 + 0000] "GET / / 192.168.1.221/user/1/friend HTTP/1.0" 20072172.16.91.0-- [11/Oct/2015:12:33:51 + 0000] "GET / / 192.168.1.221/user/1/friend HTTP/1.0" 20072 # and second Pod172.16.91. 1-- [11/Oct/2015:12:33:51 + 0000] "GET / / 192.168.1.221/user/1/friend HTTP/1.0" 20072172.16.91.1-- [11/Oct/2015:12:33:51 + 0000] "GET / / 192.168.1.221/user/1/friend HTTP/1.0" 20072 Thank you for reading The above is the content of "how Kubernetes deploys ReplicationController multi-copy load balancer". After the study of this article, I believe you have a deeper understanding of how Kubernetes deploys ReplicationController multi-copy load balancer, and the specific usage needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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