Kubernets 案例
1. 部署java项目¶
将公司的java项目部署到K8S中，
tomcat 三个实例 mysql 单实例 deployment/service/ingress --- statefulset headless-service pv,pvc(storageclass PV自动供给)
[root@k8s-lb01 opt]# ls
docker-compose-Linux-x86_64 harbor-offline-installer-v1.6.1.tgz
[root@k8s-lb01 opt]# chmod +x docker-compose-Linux-x86_64
[root@k8s-lb01 opt]# ls
docker-compose-Linux-x86_64 harbor-offline-installer-v1.6.1.tgz
[root@k8s-lb01 opt]# tar xf harbor-offline-installer-v1.6.1.tgz
[root@k8s-lb01 opt]# mv docker-compose-Linux-x86_64 /bin/docker-compose
[root@k8s-lb01 opt]# chmod +x /bin/docker-compose
[root@k8s-lb01 opt]# cd harbor/
修改访问地址，也就是harbor仓库地址
[root@k8s-lb01 harbor]# sed -i 's/hostname = reg.mydomain.com/hostname = 192.168.186.143/g' harbor.cfg
[root@k8s-lb01 harbor]# grep 192.168.186.143 harbor.cfg
hostname = 192.168.186.143
生成环境文件
[root@k8s-lb01 harbor]# ./prepare
Generated and saved secret to file: /data/secretkey
Generated configuration file: ./common/config/nginx/nginx.conf
Generated configuration file: ./common/config/adminserver/env
Generated configuration file: ./common/config/ui/env
Generated configuration file: ./common/config/registry/config.yml
Generated configuration file: ./common/config/db/env
Generated configuration file: ./common/config/jobservice/env
Generated configuration file: ./common/config/jobservice/config.yml
Generated configuration file: ./common/config/log/logrotate.conf
Generated configuration file: ./common/config/registryctl/env
Generated configuration file: ./common/config/ui/app.conf
Generated certificate, key file: ./common/config/ui/private_key.pem, cert file: ./common/config/registry/
root.crtThe configuration files are ready, please use docker-compose to start the service.
确保harbor机器上的docker启动。
[root@k8s-lb01 harbor]# systemctl start docker
[root@k8s-lb01 harbor]# systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
Active: active (running) since Sun 2019-04-28 13:47:25 CST; 4s ago
Docs: https://docs.docker.com
Main PID: 120472 (dockerd)
Tasks: 11
Memory: 115.2M
CGroup: /system.slice/docker.service
└─120472 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
Apr 28 13:47:24 k8s-lb01 dockerd[120472]: time="2019-04-28T13:47:24.777678214+08:00" level=info ms...grpc
Apr 28 13:47:24 k8s-lb01 dockerd[120472]: time="2019-04-28T13:47:24.777906986+08:00" level=info ms...grpc
Apr 28 13:47:24 k8s-lb01 dockerd[120472]: time="2019-04-28T13:47:24.811816578+08:00" level=info ms...nds"
Apr 28 13:47:24 k8s-lb01 dockerd[120472]: time="2019-04-28T13:47:24.813312962+08:00" level=info ms...rt."
Apr 28 13:47:25 k8s-lb01 dockerd[120472]: time="2019-04-28T13:47:25.156849516+08:00" level=info ms...ess"
Apr 28 13:47:25 k8s-lb01 dockerd[120472]: time="2019-04-28T13:47:25.349981896+08:00" level=info ms...ne."
Apr 28 13:47:25 k8s-lb01 dockerd[120472]: time="2019-04-28T13:47:25.478879284+08:00" level=info ms...09.5
Apr 28 13:47:25 k8s-lb01 dockerd[120472]: time="2019-04-28T13:47:25.479271714+08:00" level=info ms...ion"
Apr 28 13:47:25 k8s-lb01 systemd[1]: Started Docker Application Container Engine.
Apr 28 13:47:25 k8s-lb01 dockerd[120472]: time="2019-04-28T13:47:25.530053164+08:00" level=info ms...ock"
Hint: Some lines were ellipsized, use -l to show in full.
安装，等待完毕
[root@k8s-lb01 harbor]# ./install.sh
启动harbor
[root@k8s-lb01 harbor]# docker-compose up -d
harbor-log is up-to-date
harbor-adminserver is up-to-date
registry is up-to-date
redis is up-to-date
harbor-db is up-to-date
harbor-ui is up-to-date
harbor-jobservice is up-to-date
nginx is up-to-date
查看harbor状态
[root@k8s-lb01 harbor]# docker-compose ps
Name Command State Ports
-------------------------------------------------------------------------------------------------------------------------------------
harbor-adminserver /harbor/start.sh Up (healthy)
harbor-db /entrypoint.sh postgres Up (healthy) 5432/tcp
harbor-jobservice /harbor/start.sh Up
harbor-log /bin/sh -c /usr/local/bin/ ... Up (healthy) 127.0.0.1:1514->10514/tcp
harbor-ui /harbor/start.sh Up (healthy)
nginx nginx -g daemon off; Up (healthy) 0.0.0.0:443->443/tcp, 0.0.0.0:4443->4443/tcp, 0.0.0.0:80->80/tcp
redis docker-entrypoint.sh redis ... Up 6379/tcp
registry /entrypoint.sh /etc/regist ... Up (healthy) 5000/tcp
都是UP。就表示启动OK。
创建基础镜像仓库。
修改node节点的指定harbor仓库地址
[root@k8s-node01 ~]# cat /etc/docker/daemon.json
{"registry-mirrors": ["http://f1361db2.m.daocloud.io"],
"insecure-registries":["192.168.186.143"]
}
[root@k8s-node01 ~]# systemctl restart docker
[root@k8s-node01 ~]# systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
Active: active (running) since Sun 2019-04-28 14:33:02 CST; 6s ago
Docs: https://docs.docker.com
Main PID: 74451 (dockerd)
Tasks: 124
Memory: 89.7M
CGroup: /system.slice/docker.service
├─74451 /usr/bin/dockerd --bip=172.17.73.1/24 --ip-masq=false --mtu=1450
├─74459 containerd --config /var/run/docker/containerd/containerd.toml --log-level info
├─74706 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.conta...
├─74873 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.conta...
├─74986 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.conta...
├─75147 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.conta...
├─75157 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.conta...
├─75327 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.conta...
├─75599 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.conta...
├─75627 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.conta...
└─75762 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.conta...
Apr 28 14:33:02 k8s-node01 systemd[1]: Started Docker Application Container Engine.
Apr 28 14:33:03 k8s-node01 dockerd[74451]: time="2019-04-28T14:33:03.082316037+08:00" level=info m...4706
Apr 28 14:33:03 k8s-node01 dockerd[74451]: time="2019-04-28T14:33:03.601109635+08:00" level=info m...4873
Apr 28 14:33:03 k8s-node01 dockerd[74451]: time="2019-04-28T14:33:03.848889848+08:00" level=info m...4986
Apr 28 14:33:04 k8s-node01 dockerd[74451]: time="2019-04-28T14:33:04.322740990+08:00" level=info m...5147
Apr 28 14:33:04 k8s-node01 dockerd[74451]: time="2019-04-28T14:33:04.330730660+08:00" level=info m...5157
Apr 28 14:33:04 k8s-node01 dockerd[74451]: time="2019-04-28T14:33:04.595311994+08:00" level=info m...5327
Apr 28 14:33:05 k8s-node01 dockerd[74451]: time="2019-04-28T14:33:05.614295926+08:00" level=info m...5599
Apr 28 14:33:05 k8s-node01 dockerd[74451]: time="2019-04-28T14:33:05.717944119+08:00" level=info m...5627
Apr 28 14:33:06 k8s-node01 dockerd[74451]: time="2019-04-28T14:33:06.110381631+08:00" level=info m...5762
Hint: Some lines were ellipsized, use -l to show in full.
同样其他node上也相同操作
[root@k8s-node02 ~]# cat /etc/docker/daemon.json
{"registry-mirrors": ["http://f1361db2.m.daocloud.io"],
"insecure-registries":["192.168.186.143"]
}
[root@k8s-node02 ~]# systemctl restart docker
[root@k8s-node02 ~]# systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2019-04-28 14:34:58 CST; 26s ago
Docs: https://docs.docker.com
Main PID: 75503 (dockerd)
Tasks: 154
Memory: 88.7M
CGroup: /system.slice/docker.service
├─75503 /usr/bin/dockerd --bip=172.17.26.1/24 --ip-masq=false --mtu=1450
├─75510 containerd --config /var/run/docker/containerd/containerd.toml --log-level info
├─75771 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/9d78c2e983500e20bd976b09543db3b4c459d7870da722af900fc863...
├─75862 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/0dc2b2c79b61b5528e00e920e2dac22b2e311ede6da9cd9bb8e5c7fe...
├─75885 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/ea53e245eacbb9e44d940d3d45f1a0519789405a79d469617a8f520e...
├─75943 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/9a4e763666c758f2baf9aac7fd66feabac481994844ae90f707ed0f1...
├─76216 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/02d7ddee415e16af6f3016a6750429b9bb24c43d7039967b9e9fd6c5...
├─76472 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/49c4d69b1acd2b56de5878e91e825ac7c904a124aa2a0ce7ba9c563a...
├─76625 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/4a3547cb56de8d45fa95f862f65031327f8ceefc8e8b26a358432bb5...
├─76643 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/4b527a258c5c0393aa6a81a2991dc378b2ead099de91a5662c3abf31...
├─76760 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/39bcf89f58fdeb4c239045dad4f418fd74638e574d4bd5bf4ed9253e...
├─77131 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/08d26453c1568bde55a22ba64462d5bd1cfdd595ba23ad1b3cd70d33...
├─77342 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/08931842f7a5e84a1c65ec5698b8566a9f4deb7fbe1f1407d98f984c...
└─77476 containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/9db7a42e54aae37a9fd2527ddc26fcb4e6a42eab6f18ff5a520df4ce...
Apr 28 14:34:59 k8s-node02 dockerd[75503]: time="2019-04-28T14:34:59.778147009+08:00" level=info msg="shim containerd-shim started" address="/containerd-shim/moby/ea53e245eac...se pid=75885
Apr 28 14:34:59 k8s-node02 dockerd[75503]: time="2019-04-28T14:34:59.932749097+08:00" level=info msg="shim containerd-shim started" address="/containerd-shim/moby/9a4e763666c...se pid=75943
Apr 28 14:35:00 k8s-node02 dockerd[75503]: time="2019-04-28T14:35:00.561857906+08:00" level=info msg="shim containerd-shim started" address="/containerd-shim/moby/02d7ddee415...se pid=76216
Apr 28 14:35:01 k8s-node02 dockerd[75503]: time="2019-04-28T14:35:01.230215643+08:00" level=info msg="shim containerd-shim started" address="/containerd-shim/moby/49c4d69b1ac...se pid=76472
Apr 28 14:35:01 k8s-node02 dockerd[75503]: time="2019-04-28T14:35:01.522859524+08:00" level=info msg="shim containerd-shim started" address="/containerd-shim/moby/4a3547cb56d...se pid=76625
Apr 28 14:35:01 k8s-node02 dockerd[75503]: time="2019-04-28T14:35:01.569893339+08:00" level=info msg="shim containerd-shim started" address="/containerd-shim/moby/4b527a258c5...se pid=76643
Apr 28 14:35:01 k8s-node02 dockerd[75503]: time="2019-04-28T14:35:01.803637142+08:00" level=info msg="shim containerd-shim started" address="/containerd-shim/moby/39bcf89f58f...se pid=76760
Apr 28 14:35:02 k8s-node02 dockerd[75503]: time="2019-04-28T14:35:02.855091441+08:00" level=info msg="shim containerd-shim started" address="/containerd-shim/moby/08d26453c15...se pid=77131
Apr 28 14:35:03 k8s-node02 dockerd[75503]: time="2019-04-28T14:35:03.530510575+08:00" level=info msg="shim containerd-shim started" address="/containerd-shim/moby/08931842f7a...se pid=77342
Apr 28 14:35:03 k8s-node02 dockerd[75503]: time="2019-04-28T14:35:03.908797660+08:00" level=info msg="shim containerd-shim started" address="/containerd-shim/moby/9db7a42e54a...se pid=77476
Hint: Some lines were ellipsized, use -l to show in full.
检查所有节点上的node docker均要正常启动。
[root@k8s-node01 ~]# git clone https://github.com/caimengzhi/tomcat-java-demo Cloning into 'tomcat-java-demo'... remote: Enumerating objects: 180, done. remote: Counting objects: 100% (180/180), done. remote: Compressing objects: 100% (162/162), done. remote: Total 180 (delta 4), reused 180 (delta 4), pack-reused 0 Receiving objects: 100% (180/180), 4.50 MiB | 149.00 KiB/s, done. Resolving deltas: 100% (4/4), done. [root@k8s-node01 ~]# tar xf apache-maven-3.5.0-bin.tar.gz [root@k8s-node01 ~]# tar xf jdk-8u45-linux-x64.tar.gz [root@k8s-node01 ~]# mv apache-maven-3.5.0 /usr/local/maven [root@k8s-node01 ~]# mv jdk1.8.0_45/ /usr/local/jdk 配置环境变量 [root@k8s-node01 ~]# tail -3 /etc/profile JAVA_HOME=/usr/local/jdk PATH=$PATH:$JAVA_HOME/bin export JAVA_HOME PATH [root@k8s-node01 ~]# source /etc/profile [root@k8s-node01 ~]# java -version java version "1.8.0_45" Java(TM) SE Runtime Environment (build 1.8.0_45-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode) 编辑java项目 [root@k8s-node01 ~]# cd tomcat-java-demo/ [root@k8s-node01 tomcat-java-demo]# ls doc Dockerfile LICENSE pom.xml README.md src [root@k8s-node01 tomcat-java-demo]# /usr/local/maven/bin/mvn clean package 省略。。。 [INFO] Packaging webapp [INFO] Assembling webapp [ly-simple-tomcat] in [/root/tomcat-java-demo/target/ly-simple-tomcat-0.0.1-SNAPSHOT] [INFO] Processing war project [INFO] Webapp assembled in [178 msecs] [INFO] Building war: /root/tomcat-java-demo/target/ly-simple-tomcat-0.0.1-SNAPSHOT.war [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 05:30 min [INFO] Finished at: 2019-04-28T02:54:07-04:00 [INFO] Final Memory: 32M/175M [INFO] ------------------------------------------------------------------------ 到此编译通过。 [root@k8s-node01 tomcat-java-demo]# ll target/ total 21304 drwxr-xr-x 5 root root 95 Apr 28 14:53 classes drwxr-xr-x 3 root root 25 Apr 28 14:53 generated-sources drwxr-xr-x 4 root root 37 Apr 28 14:54 ly-simple-tomcat-0.0.1-SNAPSHOT -rw-r--r-- 1 root root 21813531 Apr 28 14:54 ly-simple-tomcat-0.0.1-SNAPSHOT.war drwxr-xr-x 2 root root 28 Apr 28 14:54 maven-archiver drwxr-xr-x 3 root root 35 Apr 28 14:53 maven-status [root@k8s-node01 tomcat-java-demo]# cat Dockerfile FROM lizhenliang/tomcat MAINTAINER caimengzhi RUN rm -rf /usr/local/tomcat/webapps/* ADD target/*.war /usr/local/tomcat/webapps/ROOT.war 构建基础镜像 [root@k8s-node01 tomcat-java-demo]# docker build -t 192.168.186.143/project/java-demo:latest . Sending build context to Docker daemon 63.1MB Step 1/4 : FROM lizhenliang/tomcat ---> 143035d83fdc Step 2/4 : MAINTAINER caimengzhi ---> Running in bc9e233d0456 Removing intermediate container bc9e233d0456 ---> 7b03e5bab490 Step 3/4 : RUN rm -rf /usr/local/tomcat/webapps/* ---> Running in 71e67f23e1c9 Removing intermediate container 71e67f23e1c9 ---> 19ceb3e4d1df Step 4/4 : ADD target/*.war /usr/local/tomcat/webapps/ROOT.war ---> 5cd2914873fb Successfully built 5cd2914873fb Successfully tagged 192.168.186.143/project/java-demo:latest [root@k8s-node01 tomcat-java-demo]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE 192.168.186.143/project/java-demo latest 5cd2914873fb 8 seconds ago 410MB 先登录到harbor，然后再推送,期中账号和密码就是登录harbor的web端的账号和密码<admin:Harbor12345> [root@k8s-node01 tomcat-java-demo]# docker login 192.168.186.143 Username: admin Password: WARNING! Your password will be stored unencrypted in /root/.docker/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded [root@k8s-node01 tomcat-java-demo]# docker push 192.168.186.143/project/java-demo:latest The push refers to repository [192.168.186.143/project/java-demo] e0e47f5a4eca: Pushed 9992f38a0262: Pushed ceead5ca823f: Pushed 2353c173a26a: Pushed 071d8bd76517: Pushed latest: digest: sha256:4223a8dbe254dcf66f35d2e0ab906458fe9f973cf62c2f590f5ad96c878866f6 size: 1371
[root@k8s-master01 ~]# mkdir project [root@k8s-master01 ~]# cd project/ [root@k8s-master01 project]# ls [root@k8s-master01 project]# rz -E rz waiting to receive. [root@k8s-master01 project]# ls java-demo_.zip php-demo_.zip [root@k8s-master01 project]# unzip java-demo_.zip Archive: java-demo_.zip creating: java-demo/ inflating: java-demo/mysql.yaml extracting: java-demo/namespace.yaml inflating: java-demo/registry-pull-secret.yaml inflating: java-demo/deployment.yaml inflating: java-demo/service.yaml inflating: java-demo/ingress.yaml [root@k8s-master01 project]# cd java-demo/ [root@k8s-master01 java-demo]# ll total 24 -rw-r--r-- 1 root root 1000 Dec 15 22:31 deployment.yaml -rw-r--r-- 1 root root 277 Dec 15 23:38 ingress.yaml -rw-r--r-- 1 root root 869 Dec 15 23:50 mysql.yaml -rw-r--r-- 1 root root 54 Dec 15 21:03 namespace.yaml -rw-r--r-- 1 root root 359 Dec 15 21:25 registry-pull-secret.yaml -rw-r--r-- 1 root root 210 Dec 15 23:07 service.yaml [root@k8s-master01 java-demo]# cat namespace.yaml apiVersion: v1 kind: Namespace metadata: name: test [root@k8s-master01 java-demo]# kubectl create -f namespace.yaml namespace/test created [root@k8s-master01 java-demo]# kubectl get ns NAME STATUS AGE default Active 9d ingress-nginx Active 3d23h kube-public Active 9d kube-system Active 9d test Active 5s
namespace.yaml
apiVersion: v1 kind: Namespace metadata: name: test
deployment.yaml
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: tomcat-java-demo
namespace: test
spec:
replicas: 3
selector:
matchLabels:
project: www
app: java-demo
template:
metadata:
labels:
project: www
app: java-demo
spec:
imagePullSecrets:
- name: registry-pull-secret
containers:
- name: tomcat
image: 192.168.186.143/project/java-demo:latest
imagePullPolicy: Always
ports:
- containerPort: 8080
name: web
protocol: TCP
resources:
requests:
cpu: 0.5
memory: 1Gi
limits:
cpu: 1
memory: 2Gi
livenessProbe:
httpGet:
path: /
port: 8080
initialDelaySeconds: 60
timeoutSeconds: 20
readinessProbe:
httpGet:
path: /
port: 8080
initialDelaySeconds: 60
timeoutSeconds: 20
deployment.yaml 中的image是要设置为harbor对应的仓库地址。修改成你的地址。imagePullSecrets。
通过命令可以查看怎么使用
[root@k8s-master01 java-demo]# kubectl create secret --help
Create a secret using specified subcommand.
Available Commands:
docker-registry Create a secret for use with a Docker registry
generic Create a secret from a local file, directory or literal value
tls Create a TLS secret
Usage:
kubectl create secret [flags] [options]
Use "kubectl <command> --help" for more information about a given command.
Use "kubectl options" for a list of global command-line options (applies to all commands).
[root@k8s-master01 java-demo]# kubectl create secret docker-registry
Error: required flag(s) "docker-password", "docker-username" not set
Examples:
# If you don't already have a .dockercfg file, you can create a dockercfg secret directly by using:
kubectl create secret docker-registry my-secret --docker-server=DOCKER_REGISTRY_SERVER --docker-username=DOCKER_USER --docker-password=DOCKER_PASSWORD --docker-email=DOC
KER_EMAIL
Options:
--allow-missing-template-keys=true: If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath o
utput formats. --append-hash=false: Append a hash of the secret to its name.
--docker-email='': Email for Docker registry
--docker-password='': Password for Docker registry authentication
--docker-server='https://index.docker.io/v1/': Server location for Docker registry
--docker-username='': Username for Docker registry authentication
--dry-run=false: If true, only print the object that would be sent, without sending it.
--from-file=[]: Key files can be specified using their file path, in which case a default name will be given to them, or optionally with a name and file path, in whi
ch case the given name will be used. Specifying a directory will iterate each named file in the directory that is a valid secret key. --generator='secret-for-docker-registry/v1': The name of the API generator to use.
-o, --output='': Output format. One of: json|yaml|name|go-template|go-template-file|template|templatefile|jsonpath|jsonpath-file.
--save-config=false: If true, the configuration of current object will be saved in its annotation. Otherwise, the annotation will be unchanged. This flag is useful w
hen you want to perform kubectl apply on this object in the future. --template='': Template string or path to template file to use when -o=go-template, -o=go-template-file. The template format is golang templates [http://golang.org/p
kg/text/template/#pkg-overview]. --validate=true: If true, use a schema to validate the input before sending it
Usage:
kubectl create secret docker-registry NAME --docker-username=user --docker-password=password --docker-email=email [--docker-server=string] [--from-literal=key1=value1] [
--dry-run] [options]
Use "kubectl options" for a list of global command-line options (applies to all commands).
required flag(s) "docker-password", "docker-username" not set
创建secret。
[root@k8s-master01 java-demo]# kubectl create secret docker-registry registry-pull-secret --docker-username=admin --docker-password=Harbor12345 --docker-email=610658552@qq.com --docker-server=192.168.186.143 -n test secret/registry-pull-secret created
# -n test表示创建在名称空间为test里面，registry-pull-secret 里上面yaml文件中指定的secret字段。其他是harbor相关信息
[root@k8s-master01 java-demo]# kubectl get secret -n test
NAME TYPE DATA AGE
default-token-266b7 kubernetes.io/service-account-token 3 9m6s
registry-pull-secret kubernetes.io/dockerconfigjson 1 2m55s
上面deployment模式pod就引用了这个secret[registry-pull-secret]
创建deployment
[root@k8s-master01 java-demo]# kubectl create -f deployment.yaml
deployment.apps/tomcat-java-demo created
查看创建pod
[root@k8s-master01 java-demo]# kubectl get pods -n test
NAME READY STATUS RESTARTS AGE
tomcat-java-demo-56696dc668-9kn2j 0/1 Pending 0 38s
tomcat-java-demo-56696dc668-fch4j 0/1 Running 0 39s
tomcat-java-demo-56696dc668-s9cqk 0/1 Running 0 38s
后来查看pennding那机器详细信息发现是我的机器的内存不足了，哈哈。我修改配置文件降低内存。就重新安装
若不是running的话，同kube describe tomcat-java-demo-56696dc668-s9cqk -n test 去查看详细信息，以下是排除详细过程。
上述问题解决排查思路
[root@k8s-master01 java-demo]# kubectl get pod -n test
NAME READY STATUS RESTARTS AGE
tomcat-java-demo-5c77966c99-5ngm9 0/1 Running 0 10s
tomcat-java-demo-5c77966c99-7zhr2 0/1 Pending 0 10s
tomcat-java-demo-5c77966c99-fhsrm 0/1 Running 0 10s
[root@k8s-master01 java-demo]# kubectl describe pod tomcat-java-demo-5c77966c99-7zhr2 -n test
Name: tomcat-java-demo-5c77966c99-7zhr2
Namespace: test
Priority: 0
PriorityClassName: <none>
Node: <none>
Labels: app=java-demo
pod-template-hash=5c77966c99
project=www
Annotations: <none>
Status: Pending
IP:
Controlled By: ReplicaSet/tomcat-java-demo-5c77966c99
Containers:
tomcat:
Image: 192.168.186.143/project/java-demo:latest
Port: 8080/TCP
Host Port: 0/TCP
Limits:
cpu: 1
memory: 1Gi
Requests:
▽ cpu: 500m
memory: 1Gi
Liveness: http-get http://:8080/ delay=60s timeout=20s period=10s #success=1 #failure=3
Readiness: http-get http://:8080/ delay=60s timeout=20s period=10s #success=1 #failure=3
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-266b7 (ro)
Conditions:
Type Status
PodScheduled False
Volumes:
default-token-266b7:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-266b7
Optional: false
QoS Class: Burstable
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 31s (x3 over 31s) default-scheduler 0/2 nodes are available: 2 Insufficient memory.
修改降低内存。我测试机内存太小。
[root@k8s-master01 java-demo]# cat deployment.yaml
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: tomcat-java-demo
namespace: test
spec:
replicas: 3
selector:
matchLabels:
project: www
app: java-demo
template:
metadata:
labels:
project: www
app: java-demo
spec:
imagePullSecrets:
- name: registry-pull-secret
containers:
- name: tomcat
image: 192.168.186.143/project/java-demo:latest
imagePullPolicy: Always
ports:
- containerPort: 8080
name: web
protocol: TCP
resources:
requests:
cpu: 0.5
memory: 0.5Gi
limits:
cpu: 1
memory: 0.5Gi
livenessProbe:
httpGet:
path: /
port: 8080
initialDelaySeconds: 60
timeoutSeconds: 20
readinessProbe:
httpGet:
path: /
port: 8080
initialDelaySeconds: 60
timeoutSeconds: 20
[root@k8s-master01 java-demo]# kubectl delete -f deployment.yaml -n test
deployment.apps "tomcat-java-demo" deleted
[root@k8s-master01 java-demo]# kubectl create -f deployment.yaml -n test
deployment.apps/tomcat-java-demo created
[root@k8s-master01 java-demo]# kubectl get pod -n test
NAME READY STATUS RESTARTS AGE
tomcat-java-demo-5c77966c99-5ngm9 0/1 Terminating 0 99s
tomcat-java-demo-6b87495c99-fr8vq 0/1 Running 0 4s
tomcat-java-demo-6b87495c99-m9jlp 0/1 Running 0 4s
tomcat-java-demo-6b87495c99-s2cdm 0/1 Running 0 4s
service.yaml
apiVersion: v1
kind: Service
metadata:
name: tomcat-java-demo
namespace: test
spec:
selector:
project: www
app: java-demo
ports:
- name: web
port: 80
targetPort: 8080
ingress.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: tomcat-java-demo
namespace: test
spec:
rules:
- host: java.caimengzhi.com
http:
paths:
- path: /
backend:
serviceName: tomcat-java-demo
servicePort: 80
[root@k8s-master01 java-demo]# kubectl apply -f ingress.yaml ingress.extensions/tomcat-java-demo created [root@k8s-master01 java-demo]# kubectl get pod,svc,ingress -n test NAME READY STATUS RESTARTS AGE pod/tomcat-java-demo-6b87495c99-fr8vq 1/1 Running 0 7m48s pod/tomcat-java-demo-6b87495c99-m9jlp 1/1 Running 0 7m48s pod/tomcat-java-demo-6b87495c99-s2cdm 1/1 Running 0 7m48s NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/tomcat-java-demo ClusterIP 10.0.0.27 <none> 80/TCP 2m20s NAME HOSTS ADDRESS PORTS AGE ingress.extensions/tomcat-java-demo java.caimengzhi.com 80 45s [root@k8s-master01 java-demo]# kubectl get pods -n ingress-nginx NAME READY STATUS RESTARTS AGE nginx-ingress-controller-678df7d6c7-hrj9v 1/1 Running 4 3d23h nginx-ingress-controller-n8jqs 1/1 Running 4 3d22h nginx-ingress-controller-xgwnw 0/1 Pending 0 3d22h
mysql.yaml
apiVersion: v1
kind: Service
metadata:
name: mysql
spec:
ports:
- port: 3306
name: mysql
clusterIP: None
selector:
app: mysql-public
---
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
name: db
spec:
serviceName: "mysql"
template:
metadata:
labels:
app: mysql-public
spec:
containers:
- name: mysql
image: mysql:5.7
env:
- name: MYSQL_ROOT_PASSWORD
value: "123456"
- name: MYSQL_DATABASE
value: test
ports:
- containerPort: 3306
volumeMounts:
- mountPath: "/var/lib/mysql"
name: mysql-data
volumeClaimTemplates:
- metadata:
name: mysql-data
spec:
accessModes: ["ReadWriteMany"]
storageClassName: "managed-nfs-storage"
resources:
requests:
storage: 2Gi
[root@k8s-master01 java-demo]# kubectl apply -f mysql.yaml service/mysql created statefulset.apps/db created 等一会，等到db创建。 [root@k8s-master01 java-demo]# kubectl get pods,svc NAME READY STATUS RESTARTS AGE pod/agent-85j4c 1/1 Running 3 46h pod/agent-kp5fp 1/1 Running 2 46h pod/busybox 1/1 Running 5 5h17m pod/db-0 1/1 Running 0 46s pod/nfs-client-provisioner-d947789f7-rchmw 1/1 Running 2 46h pod/web-0 1/1 Running 1 5h20m pod/web-1 1/1 Running 1 5h20m pod/web-2 1/1 Running 1 5h20m NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/kubernetes ClusterIP 10.0.0.1 <none> 443/TCP 9d service/mysql ClusterIP None <none> 3306/TCP 46s service/nginx ClusterIP None <none> 80/TCP 5h20m [root@k8s-master01 java-demo]# kubectl get pv,pvc NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE persistentvolume/pvc-1e188d5b-698a-11e9-8c4f-000c2994bdca 2Gi RWX Delete Bound default/mysql-data-db-0 managed-nfs-storage 103s persistentvolume/pvc-7383e81d-695d-11e9-8c4f-000c2994bdca 1Gi RWO Delete Bound default/www-web-0 managed-nfs-storage 5h21m persistentvolume/pvc-7d6cbcac-695d-11e9-8c4f-000c2994bdca 1Gi RWO Delete Bound default/www-web-1 managed-nfs-storage 5h21m persistentvolume/pvc-7f234bb6-695d-11e9-8c4f-000c2994bdca 1Gi RWO Delete Bound default/www-web-2 managed-nfs-storage 5h21m NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE persistentvolumeclaim/mysql-data-db-0 Bound pvc-1e188d5b-698a-11e9-8c4f-000c2994bdca 2Gi RWX managed-nfs-storage 108s persistentvolumeclaim/www-web-0 Bound pvc-7383e81d-695d-11e9-8c4f-000c2994bdca 1Gi RWO managed-nfs-storage 5h21m persistentvolumeclaim/www-web-1 Bound pvc-7d6cbcac-695d-11e9-8c4f-000c2994bdca 1Gi RWO managed-nfs-storage 5h21m persistentvolumeclaim/www-web-2 Bound pvc-7f234bb6-695d-11e9-8c4f-000c2994bdca 1Gi RWO managed-nfs-storage 5h21m [root@k8s-master01 java-demo]# kubectl get pv,pvc | grep db persistentvolume/pvc-1e188d5b-698a-11e9-8c4f-000c2994bdca 2Gi RWX Delete Bound default/mysql-data-db-0 managed-nfs-storage 2m25s persistentvolumeclaim/mysql-data-db-0 Bound pvc-1e188d5b-698a-11e9-8c4f-000c2994bdca 2Gi RWX managed-nfs-storage 2m30s
[root@k8s-master01 java-demo]# kubectl get pod NAME READY STATUS RESTARTS AGE agent-85j4c 1/1 Running 3 46h agent-kp5fp 1/1 Running 2 46h busybox 1/1 Running 5 5h19m db-0 1/1 Running 0 3m30s nfs-client-provisioner-d947789f7-rchmw 1/1 Running 2 46h web-0 1/1 Running 1 5h23m web-1 1/1 Running 1 5h22m web-2 1/1 Running 1 5h22m [root@k8s-master01 java-demo]# kubectl exec -it db-0 bash root@db-0:/# mysql -uroot -p123456 mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.26 MySQL Community Server (GPL) Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> ^DBye
tables_ly_tomcat.sql
[root@k8s-node01 tomcat-java-demo]# cat doc/db/tables_ly_tomcat.sql /* MySQL - 5.6.30-log : Database - test */ CREATE DATABASE IF NOT EXISTS `test` DEFAULT CHARACTER SET utf8 ; USE `test`; CREATE TABLE `user` ( `id` INT(11) NOT NULL AUTO_INCREMENT, `name` VARCHAR(100) NOT NULL COMMENT '名字', `age` INT(3) NOT NULL COMMENT '年龄', `sex` CHAR(1) DEFAULT NULL COMMENT '性别', PRIMARY KEY (`id`) ) ENGINE=INNODB DEFAULT CHARSET=utf8;
接下来开始初始化数据库，先将node1上的sql拷贝到master上，然后再在master上将sql拷贝带pod为db-0里面
[root@k8s-node01 tomcat-java-demo]# scp doc/db/tables_ly_tomcat.sql root@192.168.186.139:~ root@192.168.186.139's password: tables_ly_tomcat.sql 100% 390 233.0KB/s 00:00 然后转战到master上数据导入到db-0的mysql中 [root@k8s-master01 ~]# kubectl cp /root/tables_ly_tomcat.sql db-0:/ [root@k8s-master01 ~]# kubectl exec -it db-0 bashr root@db-0:/# ls tables_ly_tomcat.sql tables_ly_tomcat.sql root@db-0:/# mysql -uroot -p123456 mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 3 Server version: 5.7.26 MySQL Community Server (GPL) Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> source tables_ly_tomcat.sql Query OK, 1 row affected, 1 warning (0.00 sec) Database changed Query OK, 0 rows affected (0.05 sec) Query OK, 0 rows affected (0.00 sec) mysql> use test; Database changed mysql> show tables; +----------------+ | Tables_in_test | +----------------+ | user | +----------------+ 1 row in set (0.00 sec) mysql> select * from user; Empty set (0.01 sec) mysql> desc user; +-------+--------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------+--------------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | name | varchar(100) | NO | | NULL | | | age | int(3) | NO | | NULL | | | sex | char(1) | YES | | NULL | | +-------+--------------+------+-----+---------+----------------+ 4 rows in set (0.00 sec)
修改mysql指定到pod中的mysql
[root@k8s-node01 tomcat-java-demo]# cat src/main/resources/application.yml
server:
port: 8080
spring:
datasource:
url: jdbc:mysql://db-0.mysql.default:3306/test?characterEncoding=utf-8
username: root
password: 123456
driver-class-name: com.mysql.jdbc.Driver
freemarker:
allow-request-override: false
cache: true
check-template-location: true
charset: UTF-8
content-type: text/html; charset=utf-8
expose-request-attributes: false
expose-session-attributes: false
expose-spring-macro-helpers: false
suffix: .ftl
template-loader-path:
- classpath:/templates/
db-0.mysql.default 是db-0为pod名字。mysql是容器名。default是名称空间名字
修改源码后重新打包。 [root@k8s-node01 tomcat-java-demo]# /usr/local/maven/bin/mvn clean package [INFO] Scanning for projects... 。。。。省略 [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 11.969 s [INFO] Finished at: 2019-04-28T04:07:37-04:00 [INFO] Final Memory: 29M/189M [INFO] ------------------------------------------------------------------------ 这次打包很快，因为第一次打包的时候，本地没有maven仓库，需要去联网下载。 生成基础镜像[有修改，我暂时称为它版本为1.0] [root@k8s-node01 tomcat-java-demo]# docker build -t 192.168.186.143/project/java-demo:1.0 . Sending build context to Docker daemon 63.1MB Step 1/4 : FROM lizhenliang/tomcat ---> 143035d83fdc Step 2/4 : MAINTAINER caimengzhi ---> Using cache ---> 7b03e5bab490 Step 3/4 : RUN rm -rf /usr/local/tomcat/webapps/* ---> Using cache ---> 19ceb3e4d1df Step 4/4 : ADD target/*.war /usr/local/tomcat/webapps/ROOT.war ---> Using cache ---> 19e86064a443 Successfully built 19e86064a443 Successfully tagged 192.168.186.143/project/java-demo:1.0 推送到harbor [root@k8s-node01 tomcat-java-demo]# docker push 192.168.186.143/project/java-demo:1.0 The push refers to repository [192.168.186.143/project/java-demo] 214419143e9b: Layer already exists 9992f38a0262: Layer already exists ceead5ca823f: Layer already exists 2353c173a26a: Layer already exists 071d8bd76517: Layer already exists 1.0: digest: sha256:18e1ae984d700d9585a59241b6206f9681921c8d04e86c299f9ebfb7e9ce694a size: 1371
[root@k8s-master01 java-demo]# sed -i 's@image: 192.168.186.143/project/java-demo:latest@image: 192.168.186.143/project/java-demo:1.0@g' deployment.yaml 更新 [root@k8s-master01 java-demo]# kubectl apply -f deployment.yaml Warning: kubectl apply should be used on resource created by either kubectl create --save-config or kubectl apply deployment.apps/tomcat-java-demo configured 查看 [root@k8s-master01 java-demo]# kubectl get pods -n test NAME READY STATUS RESTARTS AGE tomcat-java-demo-6b87495c99-fr8vq 1/1 Running 0 43m tomcat-java-demo-6b87495c99-m9jlp 1/1 Running 0 43m tomcat-java-demo-6b87495c99-s2cdm 1/1 Running 0 43m tomcat-java-demo-6d584d6fcc-hs9z2 0/1 Running 0 47s 此时在滚动更新。等待好几分钟[根据你的yaml中的deployment的监控检查，大致判断出需要多少时间，差不多80秒左右一个pod，等待即可，反正最后就三个tomcat]。 我等待了两三分钟后再次查看。 [root@k8s-master01 java-demo]# kubectl get pods -n test NAME READY STATUS RESTARTS AGE tomcat-java-demo-6d584d6fcc-6gt4x 1/1 Running 0 76s tomcat-java-demo-6d584d6fcc-9t7hn 1/1 Running 0 2m20s tomcat-java-demo-6d584d6fcc-hs9z2 1/1 Running 0 3m31s
2. 部署php¶
和部署java的差不多。我以开源的wordpress为例。
[root@k8s-node01 ~]# git clone https://github.com/caimengzhi/php-demo.git Cloning into 'php-demo'... remote: Enumerating objects: 1894, done. remote: Counting objects: 100% (1894/1894), done. remote: Compressing objects: 100% (1690/1690), done. remote: Total 1894 (delta 171), reused 1894 (delta 171), pack-reused 0 Receiving objects: 100% (1894/1894), 10.84 MiB | 646.00 KiB/s, done. Resolving deltas: 100% (171/171), done.
[root@k8s-node01 ~]# cd php-demo/
修改wordpress的数据。就是上面弄好的db-0那个mysql。
[root@k8s-node01 php-demo]# cat wp-config.php |grep db
define('DB_HOST', 'db-0.mysql.default');
推送镜像
[root@k8s-node01 php-demo]# docker build -t 192.168.186.143/project/php-demo:1.0 .
Sending build context to Docker daemon 57.08MB
Step 1/3 : FROM lizhenliang/nginx-php:latest
latest: Pulling from lizhenliang/nginx-php
a02a4930cb5d: Already exists
fa86e91a9cea: Pull complete
a2ee3cdd92de: Pull complete
6eafef900f83: Pull complete
7c524fc4fb55: Pull complete
10b63beb6450: Pull complete
1b83328bbf44: Pull complete
Digest: sha256:6e5f35d9eddcd3e5db05668110a0b01e094ccf99f5d00811153a091fbba0402f
Status: Downloaded newer image for lizhenliang/nginx-php:latest
---> 2dfb7012dd85
Step 2/3 : MAINTAINER caimengzhi
---> Running in d9e4849bfb49
Removing intermediate container d9e4849bfb49
---> 23b73d2b2ddf
Step 3/3 : ADD . /usr/local/nginx/html
---> ce5aae4a5826
Successfully built ce5aae4a5826
Successfully tagged 192.168.186.143/project/php-demo:1.0
[root@k8s-node01 php-demo]# docker push 192.168.186.143/project/php-demo:1.0
The push refers to repository [192.168.186.143/project/php-demo]
c7769154a34c: Pushed
7081ec6f65bb: Pushed
04cd82449427: Pushed
2fd331e80a89: Pushed
924522699749: Pushed
a80e6454a6fe: Pushed
a71af749bf3b: Pushed
071d8bd76517: Mounted from project/java-demo
1.0: digest: sha256:e4e5926d0d84d338cfb406a76d22c69e8966ab17c10f77fbf103392d704702dd size: 1999
deployment.yaml
apiVersion: apps/v1beta1 kind: Deployment metadata: name: php-demo namespace: test spec: replicas: 3 selector: matchLabels: project: www app: php-demo template: metadata: labels: project: www app: php-demo spec: imagePullSecrets: - name: registry-pull-secret containers: - name: nginx image: 192.168.186.143/project/php-demo:1.0 imagePullPolicy: Always ports: - containerPort: 80 name: web protocol: TCP resources: requests: cpu: 0.5 memory: 256Mi limits: cpu: 1 memory: 1Gi resources: requests: cpu: 0.5 memory: 256Mi limits: cpu: 1 memory: 1Gi livenessProbe: httpGet: path: /index.html port: 80 initialDelaySeconds: 6 timeoutSeconds: 20
[root@k8s-master01 php-demo]# kubectl apply -f deployment.yaml deployment.apps/php-demo created [root@k8s-master01 php-demo]# kubectl get pod -n test NAME READY STATUS RESTARTS AGE php-demo-6d447c876b-csm6p 1/1 Running 0 26s php-demo-6d447c876b-knjwg 1/1 Running 0 26s php-demo-6d447c876b-pjdwd 1/1 Running 0 26s tomcat-java-demo-6d584d6fcc-6gt4x 1/1 Running 0 42m tomcat-java-demo-6d584d6fcc-9t7hn 1/1 Running 0 43m tomcat-java-demo-6d584d6fcc-hs9z2 1/1 Running 0 44m
service.yaml
# [root@k8s-master01 php-demo]# vim service.yaml
apiVersion: v1
kind: Service
metadata:
name: php-demo
namespace: test
spec:
selector:
project: www
app: php-demo
ports:
- name: web
port: 80
targetPort: 80
ingress.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: php-demo
namespace: test
spec:
rules:
- host: php.caimengzhi.com
http:
paths:
- path: /
backend:
serviceName: php-demo
servicePort: 80
[root@k8s-master01 php-demo]# kubectl apply -f service.yaml
service/php-demo created
[root@k8s-master01 php-demo]# kubectl get svc -n test
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
php-demo ClusterIP 10.0.0.240 <none> 80/TCP 13s
tomcat-java-demo ClusterIP 10.0.0.27 <none> 80/TCP 83m
[root@k8s-master01 php-demo]# kubectl apply -f ingress.yaml
ingress.extensions/php-demo created
[root@k8s-node01 php-demo]# cat wp-config.php |grep -C2 DB_NAME
// ** MySQL 设置 - 具体信息来自您正在使用的主机 ** //
/** WordPress数据库的名称 */
define('DB_NAME', 'test');
/** MySQL数据库用户名 */
wordpress 使用的默认test库，之前部署java项目的时候，使用了test库，为了wordpress初始化的时候怕出啥问题，我将之前的test库中表删掉
[root@k8s-master01 php-demo]# kubectl exec -it db-0 bash
root@db-0:/# mysql -uroot -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 64
Server version: 5.7.26 MySQL Community Server (GPL)
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use test;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| user |
+----------------+
1 row in set (0.01 sec)
mysql> drop table user;
Query OK, 0 rows affected (0.04 sec)
然后找到本的hosts，添加hosts解析。我的是windows系统C:\Windows\System32\drivers\etc\hosts ，若是linux的话/etc/hosts
192.168.186.141 php.caimengzhi.com
php.caimengzhi.com安装。
