Docker制作数据库中间件Mycat源码镜像
经过修改的Mycat已经比较符合使用了，为了在使用过程中尽量减少不必要的错误操作，我们打算将其制作成docker镜像。制作docker需要一个稳定的基础环境，这里以boot2docker为基础镜像使用Dokcerfile的方式进行构建。
环境原料准备
注：只需要准备下面用到的就可以了。
Dokcerfile配置
FROM boot2docker/boot2docker:latest
MAINTAINER [email protected]
ADD jdk-8u121-linux-x64.tar.gz /usr/local/
ADD mycat /usr/local/mycat
ENV JAVA_HOME /usr/local/jdk1.8.0_121
ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
ENV PATH $PATH:$JAVA_HOME/bin
EXPOSE 8066 9066
RUN chmod -R 777 /usr/local/mycat/bin
CMD ["./usr/local/mycat/bin/mycat", "console"]
Dockerfile构建
构建命令：docker build -t boonyadocker/boot2docker-mycat:latest .
构建日志：
[root@mysqlserver java-maven-tomcat-jenkins]# docker build -t boonyadocker/boot2docker-mycat:latest .
Sending build context to Docker daemon 308.2 MB
Sending build context to Docker daemon
Step 0 : FROM boot2docker/boot2docker:latest
---> 898cd2a4a97e
Step 1 : MAINTAINER [email protected]
---> Running in fc976d113c14
---> 4c15c54bace0
Removing intermediate container fc976d113c14
Step 2 : ADD jdk-8u121-linux-x64.tar.gz /usr/local/
---> c2a68d90a7e8
Removing intermediate container 1dabd2085544
Step 3 : ADD mycat /usr/local/mycat
---> ebf0de05e8ec
Removing intermediate container 66eda0fb1dca
Step 4 : ENV JAVA_HOME /usr/local/jdk1.8.0_121
---> Running in ab924224a988
---> bcbb94be23e1
Removing intermediate container ab924224a988
Step 5 : ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
---> Running in f84d0bafc488
---> fbe32cae8f24
Removing intermediate container f84d0bafc488
Step 6 : ENV PATH $PATH:$JAVA_HOME/bin
---> Running in aec65e85bdcb
---> 9684515e4b07
Removing intermediate container aec65e85bdcb
Step 7 : EXPOSE 8066 9066
---> Running in 2478366fb94e
---> b78e089eacb5
Removing intermediate container 2478366fb94e
Step 8 : RUN chmod -R 777 /usr/local/mycat/bin
---> Running in fc6c52bf492b
---> d9730028fa48
Removing intermediate container fc6c52bf492b
Step 9 : CMD ./usr/local/mycat/bin/mycat console
---> Running in bd7431de7e76
---> cf46ef25daf5
Removing intermediate container bd7431de7e76
Successfully built cf46ef25daf5镜像列表：
[root@mysqlserver java-maven-tomcat-jenkins]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
boonyadocker/boot2docker-mycat latest cf46ef25daf5 20 seconds ago 2.607 GB
boonyadocker/boot2docker-tomcat latest 31ad702ceffa 12 days ago 2.602 GB
boonyadocker/boot2docker-jenkins latest a0090abfd7c8 12 days ago 2.685 GB
boonyadocker/centos-jenkins latest 1250a4fe0292 12 days ago 659 MB
boonyadocker/centos-jenkins allow-remote 47e38ec3f8bc 2 weeks ago 658.7 MB
boonyadocker/centos-tomcat allow-remote a3cf71b7dd49 2 weeks ago 575.9 MB
tomcat latest 70b2ded797df 2 weeks ago 292.4 MB
boot2docker/boot2docker latest 898cd2a4a97e 2 weeks ago 2.219 GB
centos latest f3b88ddaed16 3 weeks ago 192.5 MB
jenkins latest de57ef56dca0 4 weeks ago 809.9 MB
openjdk 8-jre cdcc2156bae7 4 weeks ago 275.1 MB
jetbrains/teamcity-server latest 47728ea3474b 5 weeks ago 1.308 GB
boonyadocker/jenkins latest e14944ad9023 6 weeks ago 654.2 MB
boonyadocker/tomcat-allow-remote latest 96d1fe00ad03 7 weeks ago 571.4 MB
[root@mysqlserver java-maven-tomcat-jenkins]# 注：以上已成功构建。
在容器中运行镜像
运行命令：docker run --name mycat -p 8066:8066 -p 9066:9066 boonyadocker/boot2docker-mycat:latest
运行日志：
Running Mycat-server...
wrapper | --> Wrapper Started as Console
wrapper | Launching a JVM...
jvm 1 | Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=64M; support was removed in 8.0
jvm 1 | Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.org
jvm 1 | Copyright 1999-2006 Tanuki Software, Inc. All Rights Reserved.
jvm 1 |
jvm 1 | 2017-08-30 01:48:01,258 [INFO ][WrapperSimpleAppMain] total resouces of dataHost localhost1 is :3 (io.mycat.backend.datasource.PhysicalDBPool:PhysicalDBPool.java:100)
jvm 1 | 2017-08-30 01:48:01,265 [INFO ][WrapperSimpleAppMain] create layer cache pool TableID2DataNodeCache of type encache ,default cache size 10000 ,default expire seconds18000 (io.mycat.cache.CacheService:CacheService.java:125)
jvm 1 | 2017-08-30 01:48:01,266 [INFO ][WrapperSimpleAppMain] create child Cache: TESTDB_ORDERS for layered cache TableID2DataNodeCache, size 50000, expire seconds 18000 (io.mycat.cache.DefaultLayedCachePool:DefaultLayedCachePool.java:80)
jvm 1 | 2017-08-30 01:48:01,391 [INFO ][WrapperSimpleAppMain] dyna class load from ./catlet,and auto check for class file modified every 60 seconds (io.mycat.config.classloader.DynaClassLoader:DynaClassLoader.java:34)
jvm 1 | 2017-08-30 01:48:01,391 [INFO ][WrapperSimpleAppMain] =============================================== (io.mycat.MycatServer:MycatServer.java:258)
jvm 1 | 2017-08-30 01:48:01,391 [INFO ][WrapperSimpleAppMain] MyCat is ready to startup ... (io.mycat.MycatServer:MycatServer.java:259)
jvm 1 | 2017-08-30 01:48:01,392 [INFO ][WrapperSimpleAppMain] Startup processors ...,total processors:8,aio thread pool size:16
jvm 1 | each process allocated socket buffer pool bytes ,a page size:2097152 a page's chunk number(PageSize/ChunkSize) is:512 buffer page's number is:160 (io.mycat.MycatServer:MycatServer.java:271)
jvm 1 | 2017-08-30 01:48:01,392 [INFO ][WrapperSimpleAppMain] sysconfig params:SystemConfig [processorBufferLocalPercent=100, frontSocketSoRcvbuf=1048576, frontSocketSoSndbuf=4194304, backSocketSoRcvbuf=4194304, backSocketSoSndbuf=1048576, frontSocketNoDelay=1, backSocketNoDelay=1, maxStringLiteralLength=65535, frontWriteQueueSize=2048, bindIp=0.0.0.0, serverPort=8066, managerPort=9066, charset=utf8, processors=8, processorExecutor=16, timerExecutor=2, managerExecutor=2, idleTimeout=1800000, catletClassCheckSeconds=60, sqlExecuteTimeout=300, processorCheckPeriod=1000, dataNodeIdleCheckPeriod=300000, dataNodeHeartbeatPeriod=10000, clusterHeartbeatUser=_HEARTBEAT_USER_, clusterHeartbeatPass=_HEARTBEAT_PASS_, clusterHeartbeatPeriod=5000, clusterHeartbeatTimeout=10000, clusterHeartbeatRetry=10, txIsolation=3, parserCommentVersion=50148, sqlRecordCount=10, bufferPoolPageSize=2097152, bufferPoolChunkSize=4096, bufferPoolPageNumber=160, maxResultSet=524288, bigResultSizeSqlCount=10, bufferUsagePercent=80, flowControlRejectStrategy=0, clearBigSqLResultSetMapMs=600000, defaultMaxLimit=100, sequnceHandlerType=2, sqlInterceptor=io.mycat.server.interceptor.impl.DefaultSqlInterceptor, sqlInterceptorType=select, sqlInterceptorFile=/usr/local/mycat/logs/sql.txt, mutiNodeLimitType=0, mutiNodePatchSize=100, defaultSqlParser=druidparser, usingAIO=0, packetHeaderSize=4, maxPacketSize=16777216, mycatNodeId=1] (io.mycat.MycatServer:MycatServer.java:272)
jvm 1 | log4j:WARN No appenders could be found for logger (io.mycat.memory.MyCatMemory).
jvm 1 | log4j:WARN Please initialize the log4j system properly.
jvm 1 | log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
jvm 1 | 2017-08-30 01:48:01,612 [INFO ][WrapperSimpleAppMain] using nio network handler (io.mycat.MycatServer:MycatServer.java:373)
jvm 1 | 2017-08-30 01:48:01,624 [INFO ][WrapperSimpleAppMain] $_MyCatManager is started and listening on 9066 (io.mycat.MycatServer:MycatServer.java:389)
jvm 1 | 2017-08-30 01:48:01,624 [INFO ][WrapperSimpleAppMain] $_MyCatServer is started and listening on 8066 (io.mycat.MycatServer:MycatServer.java:393)
jvm 1 | 2017-08-30 01:48:01,624 [INFO ][WrapperSimpleAppMain] =============================================== (io.mycat.MycatServer:MycatServer.java:395)
jvm 1 | 2017-08-30 01:48:01,624 [INFO ][WrapperSimpleAppMain] Initialize dataHost ... (io.mycat.MycatServer:MycatServer.java:399)
jvm 1 | 2017-08-30 01:48:01,624 [INFO ][WrapperSimpleAppMain] init backend myqsl source ,create connections total 10 for hostM1 index :0 (io.mycat.backend.datasource.PhysicalDBPool:PhysicalDBPool.java:294)
jvm 1 | 2017-08-30 01:48:01,636 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema db3 (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2017-08-30 01:48:01,636 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema db2 (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2017-08-30 01:48:01,637 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema db1 (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2017-08-30 01:48:01,637 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema db3 (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2017-08-30 01:48:01,638 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema db2 (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
..............
查看正在运行的容器：
[root@mysqlserver ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
34e3ef01f9e4 boonyadocker/boot2docker-mycat:latest "./usr/local/mycat/b 10 minutes ago Up 10 minutes 0.0.0.0:8066->8066/tcp, 0.0.0.0:9066->9066/tcp mycat
2b3f9dca2c40 boonyadocker/boot2docker-jenkins:latest "/bin/sh -c '/usr/lo 12 days ago Up 9 days 0.0.0.0:8888->8080/tcp boot2docker-jenkins-20170817
9483cc274809 boonyadocker/boot2docker-tomcat:latest "/bin/sh -c '/usr/lo 12 days ago Up 9 days 0.0.0.0:8080->8080/tcp boot2docker-tomcat-20170817
[root@mysqlserver ~]# 由此可见，mycat镜像制作完成。注意：docker依赖的基础镜像需要斟酌，毕竟boot2docker构建后的镜像太过于庞大，可以试试直接根据centos或者linux基础镜像进行构建。
测试mycat连接
首先我们看一下分配给mycat运行容器的IP地址，命令：service iptables status
Table: nat
Chain PREROUTING (policy ACCEPT)
num target prot opt source destination
1 DOCKER all -- 0.0.0.0/0 0.0.0.0/0 ADDRTYPE match dst-type LOCAL
Chain POSTROUTING (policy ACCEPT)
num target prot opt source destination
1 SNAT all -- 172.17.0.8 172.17.0.8 to:10.10.x.x
2 SNAT all -- 172.17.0.8 0.0.0.0/0 to:10.10.x.x
3 SNAT all -- 172.18.0.8 0.0.0.0/0 to:10.10.x.x
4 MASQUERADE all -- 172.17.0.0/16 0.0.0.0/0
5 MASQUERADE tcp -- 172.17.0.8 172.17.0.8 tcp dpt:8080
6 MASQUERADE tcp -- 172.17.0.9 172.17.0.9 tcp dpt:8080
7 MASQUERADE tcp -- 172.17.0.28 172.17.0.28 tcp dpt:9066
8 MASQUERADE tcp -- 172.17.0.28 172.17.0.28 tcp dpt:8066
Chain OUTPUT (policy ACCEPT)
num target prot opt source destination
1 DOCKER all -- 0.0.0.0/0 !127.0.0.0/8 ADDRTYPE match dst-type LOCAL
Chain DOCKER (2 references)
num target prot opt source destination
1 DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:8080 to:172.17.0.8:8080
2 DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:8888 to:172.17.0.9:8080
3 DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:9066 to:172.17.0.28:9066
4 DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:8066 to:172.17.0.28:8066
Table: filter
Chain INPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:10050 state NEW,ESTABLISHED
2 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:21 state NEW,ESTABLISHED
3 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:3306 state NEW,ESTABLISHED
4 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:3036
5 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
6 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
7 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
8 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22
9 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
Chain FORWARD (policy ACCEPT)
num target prot opt source destination
1 DOCKER all -- 0.0.0.0/0 0.0.0.0/0
2 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
3 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
4 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
5 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
Chain OUTPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp spt:10050 state ESTABLISHED
2 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp spt:3306 state ESTABLISHED
Chain DOCKER (1 references)
num target prot opt source destination
1 ACCEPT tcp -- 0.0.0.0/0 172.17.0.8 tcp dpt:8080
2 ACCEPT tcp -- 0.0.0.0/0 172.17.0.9 tcp dpt:8080
3 ACCEPT tcp -- 0.0.0.0/0 172.17.0.28 tcp dpt:9066
4 ACCEPT tcp -- 0.0.0.0/0 172.17.0.28 tcp dpt:8066
[root@mysqlserver java-maven-tomcat-jenkins]#
发现外部是不能直接访问容器的，我们从宿主机IP去访问：
这样就访问成功了，密码可以进入容器进行查看：在/usr/local/mycat/conf/server.xml中有定义。一睹mycat数据库的芳容：
为了省去翻箱倒柜的步骤，这里还是说下用户和密码：root/digdeep 或 user/user 。
提供公共仓库镜像
下载命令：docker pull boonyadocker/boot2docker-mycat
