一步步学习k8s
Posted 中國颜值的半壁江山
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了一步步学习k8s相关的知识，希望对你有一定的参考价值。
一步步学习k8s(三)
将apollo交付到K8S中，apollp是携程公司开源的软件
apollp官网：https://github.com/ctripcorp/apollo
安装数据库，Mariadb，版本要高于10.1，对应mysql版本要高于5.6
在10.4.7.11机器上安装
[root@hdss7-11 yum.repos.d]# vim Mariadb.repo
[mariadb]
name=MariaDB
baseurl=https://mirrors.ustc.edu.cn/mariadb/yum/10.1/centos7-amd64/
gpgkey=https://mirrors.ustc.edu.cn/mariadb/yum/RPN-GPG-KEY-MariaDB
gpgcheck=1
# 导入 GPG-KEY
[root@hdss7-11 yum.repos.d]# rpm --import https://mirrors.ustc.edu.cn/mariadb/yum/RPM-GPG-KEY-MariaDB
[root@hdss7-11 yum.repos.d]# yum list MariaDB-server --show-duplicates
# 安装Mariadb数据库
[root@hdss7-11 yum.repos.d]# yum -y install mariadb-server
修改配置文件
[root@hdss7-11 ~]# vim /etc/my.cnf.d/server.cnf
[mysqld]
character_set_server = utf8mb4
collation_server = utf8mb4_general_ci
init_connect = "SET NAMES 'utf8mb4'"
[root@hdss7-11 ~]# vim /etc/my.cnf.d/mysql-clients.cnf
[mysql]
default-character-set = utf8mb4
启动Mariadb
[root@hdss7-11 ~]# systemctl start mariadb
[root@hdss7-11 ~]# systemctl enable mariadb
[root@hdss7-11 ~]# netstat -luntp |grep 3306
tcp6 0 0 :::3306 :::* LISTEN 16555/mysqld
修改数据库管理员密码
[root@hdss7-11 ~]# mysqladmin -u root password
New password: (123456)
Confirm new password: (123456)
执行数据库初始化的脚本
数据库脚本地址
或者到链接：https://pan.baidu.com/s/1V1S1nXvjIzKNXY5BDT0g7A
提取码：lszs
[root@hdss7-11 ~]# wget https://raw.githubusercontent.com/ctripcorp/apollo/v1.8.1/scripts/sql/apolloconfigdb.sql -O apolloconfigdb.sql
[root@hdss7-11 ~]# mysql -uroot -p < apolloconfigdb.sql
如下：
给数据库用户授权
grant INSERT,DELETE,UPDATE,SELECT on ApolloconfigDB.* to apolloconfig@'10.4.7.%' identified by '123456';
修改初始数据
UPDATE ServerConfig SET ServerConfig.Value = "http://config.od.com/eureka" WHERE ServerConfig.Key="eureka.service.url"
修改dns解析配置
[root@hdss7-11 ~]# vim /var/named/od.com.zone
$ORIGIN od.com.
$TTL 600 ; 10 minutes
@ IN SOA dns.od.com. dnsadmin.od.com. (
2021032909 ; serial
10800 ; refresh (3 hours)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minimum (1 day)
)
NS dns.od.com.
$TTL 60 ; 1 minute
dns A 10.4.7.11
harbor A 10.4.7.200
k8s-yaml A 10.4.7.200
traefik A 10.4.7.10
dashboard A 10.4.7.10
zk1 A 10.4.7.11
zk2 A 10.4.7.12
ZK3 A 10.4.7.21
jenkins A 10.4.7.10
config A 10.4.7.10
mysql A 10.4.7.11
[root@hdss7-11 ~]# systemctl restart named
安装
下载地址：https://github.com/ctripcorp/apollo/releases/tag/v1.8.1
上传到运维主机10.4.7.200的 /opt/src 目录下
[root@hdss7-200 src]# mkdir /home/dockerfile/apollo-configservice
[root@hdss7-200 src]# unzip -o apollo-configservice-1.8.1-github.zip -d /home/dockerfile/apollo-configservice/
[root@hdss7-200 apollo-configservice]# rm -f apollo-configservice-1.8.1-sources.jar
[root@hdss7-200 apollo-configservice]# cd config/
[root@hdss7-200 config]# vim application-github.properties
# DataSource
spring.datasource.url = jdbc:mysql://mysql.od.com:3306/ApolloConfigDB?characterEncoding=utf8
spring.datasource.username = apolloconfig
spring.datasource.password = 123456
[root@hdss7-200 apollo-configservice]# cd ../scripts/ && ls
shutdown.sh startup.sh
# 替换掉startup.sh，到下面的网址复制新脚本的内容
[root@hdss7-200 scripts]# vim startup.sh
#!/bin/bash
SERVICE_NAME=apollo-configservice
## Adjust log dir if necessary
LOG_DIR=/opt/logs/apollo-config-server
## Adjust server port if necessary
SERVER_PORT=8080
APOLLO_CONFIG_SERVICE_NAME=$(hostname -i)
SERVER_URL="http://${APOLLO_CONFIG_SERVICE_NAME}:${SERVER_PORT}"
## Adjust memory settings if necessary
#export JAVA_OPTS="-Xms6144m -Xmx6144m -Xss256k -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=384m -XX:NewSize=4096m -XX:MaxNewSize=4096m -XX:SurvivorRatio=8"
export JAVA_OPTS="-Xms128m -Xmx128m -Xss256k -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=384m -XX:NewSize=256m -XX:MaxNewSize=256m -XX:SurvivorRatio=8"
## Only uncomment the following when you are using server jvm
#export JAVA_OPTS="$JAVA_OPTS -server -XX:-ReduceInitialCardMarks"
########### The following is the same for configservice, adminservice, portal ###########
export JAVA_OPTS="$JAVA_OPTS -XX:ParallelGCThreads=4 -XX:MaxTenuringThreshold=9 -XX:+DisableExplicitGC -XX:+ScavengeBeforeFullGC -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+ExplicitGCInv
okesConcurrent -XX:+HeapDumpOnOutOfMemoryError -XX:-OmitStackTraceInFastThrow -Duser.timezone=Asia/Shanghai -Dclient.encoding.override=UTF-8 -Dfile.encoding=UTF-8 -Djava.security.egd=file:/dev/./urandom"export JAVA_OPTS="$JAVA_OPTS -Dserver.port=$SERVER_PORT -Dlogging.file.name=$LOG_DIR/$SERVICE_NAME.log -XX:HeapDumpPath=$LOG_DIR/HeapDumpOnOutOfMemoryError/"
# Find Java
if [[ -n "$JAVA_HOME" ]] && [[ -x "$JAVA_HOME/bin/java" ]]; then
javaexe="$JAVA_HOME/bin/java"
elif type -p java > /dev/null 2>&1; then
javaexe=$(type -p java)
elif [[ -x "/usr/bin/java" ]]; then
javaexe="/usr/bin/java"
else
echo "Unable to find Java"
exit 1
fi
if [[ "$javaexe" ]]; then
version=$("$javaexe" -version 2>&1 | awk -F '"' '/version/ {print $2}')
version=$(echo "$version" | awk -F. '{printf("%03d%03d",$1,$2);}')
# now version is of format 009003 (9.3.x)
if [ $version -ge 011000 ]; then
JAVA_OPTS="$JAVA_OPTS -Xlog:gc*:$LOG_DIR/gc.log:time,level,tags -Xlog:safepoint -Xlog:gc+heap=trace"
elif [ $version -ge 010000 ]; then
JAVA_OPTS="$JAVA_OPTS -Xlog:gc*:$LOG_DIR/gc.log:time,level,tags -Xlog:safepoint -Xlog:gc+heap=trace"
elif [ $version -ge 009000 ]; then
JAVA_OPTS="$JAVA_OPTS -Xlog:gc*:$LOG_DIR/gc.log:time,level,tags -Xlog:safepoint -Xlog:gc+heap=trace"
else
JAVA_OPTS="$JAVA_OPTS -XX:+UseParNewGC"
JAVA_OPTS="$JAVA_OPTS -Xloggc:$LOG_DIR/gc.log -XX:+PrintGCDetails"
JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=60 -XX:+CMSClassUn
loadingEnabled -XX:+CMSParallelRemarkEnabled -XX:CMSFullGCsBeforeCompaction=9 -XX:+CMSClassUnloadingEnabled -XX:+PrintGCDateStamps -XX:+PrintGCApplicationConcurrentTime -XX:+PrintHeapAtGC -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=5M" fi
fi
printf "$(date) ==== Starting ==== \\n"
cd `dirname $0`/..
chmod 755 $SERVICE_NAME".jar"
./$SERVICE_NAME".jar" start
rc=$?;
if [[ $rc != 0 ]];
then
echo "$(date) Failed to start $SERVICE_NAME.jar, return code: $rc"
exit $rc;
fi
tail -f /dev/null
创建Dockerfile
[root@hdss7-200 apollo-configservice]# vim Dockerfile
FROM stanleyws/jre8:8u112
ENV VERSION 1.8.1
RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \\
echo "Asia/Shanghai" > /etc/timezone
ADD apollo-configservice-${VERSION}.jar /apollo-configservice/apollo-configservice.jar
ADD config/ /apollo-configservice/config
ADD scripts/ /apollo-configservice/scripts
CMD ["/apollo-config-server/scripts/startup.sh"
生成镜像并上传到harbor仓库
[root@hdss7-200 apollo-configservice]# docker build . -t harbor.od.com/infra/apollo-configservice:v1.8.1
Sending build context to Docker daemon 71.74MB
Step 1/7 : FROM stanleyws/jre8:8u112
---> fa3a085d6ef1
Step 2/7 : ENV VERSION 1.8.1
---> Using cache
---> e60a14359025
Step 3/7 : RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo "Asia/Shanghai" > /etc/timezone
---> Using cache
---> c67ca99f3db8
Step 4/7 : ADD apollo-configservice-${VERSION}.jar /apollo-configservice/apollo-configservice.jar
---> 3cc47a5a1b39
Step 5/7 : ADD config/ /apollo-configservice/config
---> cf2782caf3a9
Step 6/7 : ADD scripts/ /apollo-configservice/scripts
---> 69800ca9fadf
Step 7/7 : CMD ["/apollo-config-server/scripts/startup.sh"]
---> Running in c41bc1b34036
Removing intermediate container c41bc1b34036
---> de14004c60e8
Successfully built de14004c60e8
Successfully tagged harbor.od.com/infra/apollo-configservice:v1.8.1
[root@hdss7-200 apollo-configservice]# docker push harbor.od.com/infra/apollo-configservice:v1.8.1
创建资源配置清单
[root@hdss7-200 apollo-configservice]# cd /home/k8s-yaml/
[root@hdss7-200 k8s-yaml]# mkdir apollo-configservice
1、Deployment
[root@hdss7-200 apollo-configservice]# vim dp.yaml
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: apollo-configservice
namespace: infra
labels:
name: apollo-configservice
spec:
replicas: 1
selector:
matchLabels :
name: apollo-configservice
template:
metadata:
labels:
app: apollo-configservice
name: apollo-configservice
spec:
volumes:
- name: configmap-volume
configMap:
name: apollo-configservice-cm
containers:
- name: apollo-configservice
image: harbor.od.com/infra/apollo-configservice:v1.8.1
ports:
- containerPort: 8080
protocol: TCP
volumeMounts:
- name: configmap-volume
mountPath: /apollo-configservice/config
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
imagePullPolicy: IfNotPresent
imagePullSecrets:
- name: harbor
restartPolicy: Always
terminationGracePeriodSeconds: 30
securityContext:
runAsUser: 0
schedulerName: default-scheduler
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
maxSurge: 1
revisionHistoryLimit: 7
progressDeadlineSeconds: 600
2、ConfigMap
[root@hdss7-200 apollo-configservice]# vim cm.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: apollo-configservice-cm
namespace: infra
data:
application-github.properties: |
# DataSource
spring.datasource.url = jdbc:mysql://mysql.od.com:3306/ApolloConfigDB?characterEncoding=utf8
spring.datasource.username = apolloconfig
spring.datasource.password = 123456
eureka.service.url = http://config.od.com/eureka
app.properties: |
appId=100003171
3、Service
[root@hdss7-200 apollo-configservice]# vim svc.yaml
kind: Service
apiVersion: v1
metadata:
name: apollo-configservice
namespace: infra
spec:
ports:
- protocol: TCP
port: 8080
targetPort: 8080
selector :
app: apollo-configservice
4、Ingress
[root@hdss7-200 apollo-configservice]# vim ingress.yaml
kind: Ingress
apiVersion: extensions/v1beta1
metadata:
name: apollo-configservice
namespace: infra
spec:
rules:
- host: config.od.com
http:
paths:
- path: /
backend:
serviceName: apollo-configservice
servicePort: 8080
应用资源配置清单
[root@hdss7-21 ~]# kubectl apply -f http://k8s-yaml.od.com/apollo-configservice/cm.yaml
configmap/apollo-configservice-cm created
[root@hdss7-21 ~]# kubectl apply -f http://k8s-yaml.od.com/apollo-configservice/dp.yaml
deployment.extensions/apollo-configservice created
[root@hdss7-21 ~]# kubectl apply -f http://k8s-yaml.od.com/apollo-configservice/svc.yaml
service/apollo-configservice created
[root@hdss7-21 ~]# kubectl apply -f http://k8s-yaml.od.com/apollo-configservice/ingress.yaml
ingress.extensions/apollo-configservice created
以上是关于一步步学习k8s的主要内容，如果未能解决你的问题，请参考以下文章
Docker&K8s---跟我一步步部署K8s(二进制安装部署)