Docker微服务-镜像构建交付和使用rancher进行容器创建管理
1.前端出口服务为阿里SLB
2.Zookeeper集群为整个微服务环境提供注册中心，Zookeeper集群每个znode的IP固定，也同样由config-service服务配置。
3.集中配置服务config-service，由git集中管理配置文件，config-service配置映射宿主机某个目录。配置如需修改直接Git中修改，触发宿主机映射的目录中进行git pull操作，然后重启对应的provider，配置即可生效。
4.facade作为分发器做分发服务。
微服务工作流程：
1)provider启动，读取写死的config-service配置服务，从配置服务中获取到Zookeeper地址，进行注册。
2)请求由阿里SLB分发至对应微服务facade，网关前往Zookeeper集群注册中心获取可用服务。
3)获取到可用provider后，facade进行分发请求，策略为轮询。
4)如后端provider挂了，无法提供服务，Zookeeper会自动剔除该服务的注册。
建立微服务基础运行环境，gateway网关、Zookeeper注册中心、config-service配置基础运行环境。开始构建以上基础运行环境：
一、创建zookeeper3.4.10集群服务
需包含了jdk和配置好环境变量的镜像，jdk1.8镜像。
jdk1.8镜像交付到阿里云Docker Registry仓库
Docker Rancher宿主机
1.下载jdk1.8.0_25.tar包，自行下载。
创建jdk构建build目录
mkdir -p /data/docker/ms-jdk
ll
-rw-r--r-- 1 root root 155 Dec 29 15:11 dockerfile
drwxr-xr-x 9 root root 268 Nov 17 2017 jdk1.8.0_25
2.编写dockfile
cat dockerfile
FROM centos
MAINTAINER jdk1.8 "name@alaxiaoyou.com"
ADD jdk1.8.0_25/ /usr/local/jdk1.8
ENV JAVA_HOME /usr/local/jdk1.8
ENV PATH $JAVA_HOME/bin:$PATH
3.构建
[root@rancher-qa ms-jdk]# docker build -t ms/jdk1.8:v1 .
Sending build context to Docker daemon 308.6MB
Step 1/5 : FROM centos
latest: Pulling from library/centos
a02a4930cb5d: Pull complete
Digest: sha256:184e5f35598e333bfa7de10d8fb1cebb5ee4df5bc0f970bf2b1e7c7345136426
Status: Downloaded newer image for centos:latest
---> 1e1148e4cc2c
Step 2/5 : MAINTAINER jdk1.8 "yuhuanghui@alaxiaoyou.com"
---> Running in 74ba397d2ab5
---> 57601effbcb9
Removing intermediate container 74ba397d2ab5
Step 3/5 : ADD jdk1.8.0_25/ /usr/local/jdk1.8
---> e960522c0399
Removing intermediate container 9408672a94d9
Step 4/5 : ENV JAVA_HOME /usr/local/jdk1.8
---> Running in 42d9c2b3239c
---> 9bb3badf22e0
Removing intermediate container 42d9c2b3239c
Step 5/5 : ENV PATH $JAVA_HOME/bin:$PATH
---> Running in d8af2f726409
---> 00d3c71ae0be
Removing intermediate container d8af2f726409
Successfully built 00d3c71ae0be
Successfully tagged ms/jdk1.8:v1
docker images 查看
4.登录阿里云容器镜像服务
创建镜像仓库名称ms-jdk1.8
5.镜像push到阿里云Docker Registry
切换到rancher/server
登录到阿里云Docker Registry
登录Docker Registry -> 打tag -> push到Docker Registry
[root@rancher-qa ms-jdk]# docker login --username=name@alaxiaoyou.com registry.cn-hangzhou.aliyuncs.com
Password: ********
Login Succeeded
[root@rancher-qa ms-jdk]#
[root@rancher-qa ms-jdk]# docker tag 00d3c71ae0be registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/ms-jdk1.8:v1.0
[root@rancher-qa ms-jdk]# docker push registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/ms-jdk1.8:v1.0
The push refers to a repository [registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/ms-jdk1.8]
96f6833b8de8: Pushed
071d8bd76517: Pushed
v1.0: digest: sha256:1c2f642e7e49cd607c36032612efcd875c191abc5edb642d7e86483d1d5b392d size: 742
查看：
至此，ms-jdk1.8镜像交付完成。
zookeeper3.4.10集群创建，并将Zookeeper3.4.10镜像交付到阿里云Docker Registry仓库。
1.zookeeper3.4.10集群构建前提准备：
zookeeper3.4.10集群需其配置文件中指定各个选举节点的ip和端口，并且zookeeper集群中的datadir(zoo.cfg配置中：dataDir=/tmp/zookeeper)中，需指定节点的myid，才能完成Zookeeper集群搭建。在不使用docker link功能前提下，容器化Zookeeper集群，需要解决：
1).myid问题。
2).Zookeeper集群节点(leader、follower)选举配置。
可使用docker内置的volume功能，将配置文件和Zookeeper的datadir映射至宿主机进行管理。
如在rancher中：
所以，宿主机必须存在：
1) zookeeper-config/，目录为Zookeeper所有配置文件，包含集群的选举节点IP和选举端口，主要zoo.cfg文件中。
ll zookeeper-config/
total 16
-rw-r--r-- 1 root root 535 Jan 4 17:43 configuration.xsl
-rw-r--r-- 1 root root 2161 Jan 4 17:43 log4j.properties
-rw-r--r-- 1 root root 1012 Jan 4 17:43 zoo.cfg
-rw-r--r-- 1 root root 922 Jan 4 17:43 zoo_sample.cf
2) zookeeper-data01/，目录对应zookeeper集群中的datadir，有存放一个myid文件，Zookeeper集群启动后产生的数据也会持久化到此宿主机目录下。Zookeeper集群有3个znode节点，所以datadir有：
zookeeper-data02/
zookeeper-data03/
ll /data/docker/
drwxr-xr-x 3 root root 48 Jan 5 17:25 ms-zookeeper3.4.10
drwxr-xr-x 2 root root 92 Jan 5 16:54 zookeeper-config
drwxr-xr-x 2 root root 18 Jan 4 17:59 zookeeper-data01
drwxr-xr-x 2 root root 18 Jan 4 18:02 zookeeper-data02
drwxr-xr-x 2 root root 18 Jan 4 18:02 zookeeper-data03
2.镜像构建
2.1 下载zookeeper-3.4.10.tar.gz包
wget https://mirrors.cnnic.cn/apache/zookeeper/zookeeper-3.4.10/zookeeper-3.4.10.tar.gz
创建zookeeper-3.4.10构建build目录
mkdir -p /data/docker/ms-zookeeper3.4.10/
-rw-r--r-- 1 root root 207 Jan 4 18:58 dockerfile
drwxr-xr-x 10 root root 4096 Mar 23 2017 zookeeper-3.4.10
2.2 编写dockfile
vim /data/docker/ms-zookeeper3.4.10/dockerfile
FROM ms/jdk1.8:v1
MAINTAINER zookeeper3.4.10 "name@alaxiaoyou.com"
ADD zookeeper-3.4.10/ /usr/local/zookeeper/
WORKDIR /usr/local/zookeeper
ENTRYPOINT ./bin/zkServer.sh start && tail -f zookeeper.out
其中zookeeper-3.4.10目录添加至镜像中，然后交付。但只是一个Zookeeper运行的模板，具体配置可通过volume，用宿主机的配置覆盖镜像中的配置。
2.3 构建，镜像
cd /data/docker/ms-zookeeper3.4.10
docker build -t ms/zookeeper3.4.10:v1 .
docker images | grep zook
ms/zookeeper3.4.10 v1 cb1bea8cf3d5 23 hours ago 567MB
registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-zookeeper-ms v1 cb1bea8cf3d5 23 hours ago 567MB
镜像运行，本地docker本身命令行启动Zookeeper容器
[root@rancher-qa docker]# docker run --name zookeeper01 -it -v /data/docker/zookeeper-config/:/usr/local/zookeeper/conf/ -v /data/docker/zookeeper-data01/:/tmp/zookeeper/ ms/zookeeper3.4.10 /bin/bash
以上docker命令行启动卷映射目录正常，宿主机目录能映射到容器中。但rancher中用UI界面进行卷映射时，发现宿主机映射的目录在容器中并未映射到。待解决。
此问题是由于，rancher有两台主机，而容器都运行在未进行设置映射目录的宿主机中。此问题困扰近一周时间，<_>
2.4 登录阿里云容器镜像服务
创建镜像仓库名称tmp-zookeeper-ms
2.5 zookeeper镜像push到阿里云Docker Registry
切换到rancher/server
登录到阿里云Docker Registry
登录Docker Registry -> 打tag -> push到Docker Registry
[root@rancher-qa ms-zookeeper3.4.10]# docker login --username=name@alaxiaoyou.com registry.cn-hangzhou.aliyuncs.com
Password:
Login Succeeded
[root@rancher-qa ms-zookeeper3.4.10]#
[root@rancher-qa ms-zookeeper3.4.10]# docker tag cb1bea8cf3d5 registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-zookeeper-ms:v1
[root@rancher-qa ms-zookeeper3.4.10]#
[root@rancher-qa ms-zookeeper3.4.10]# docker push registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-zookeeper-ms:v1
The push refers to a repository [registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-zookeeper-ms]
ed1b06ecb437: Pushed
96f6833b8de8: Mounted from xmbaby-tmp/ms-jdk1.8
071d8bd76517: Mounted from xmbaby-tmp/ms-jdk1.8
v1: digest: sha256:c55b36fb410d7db9409e3ca4fb27e0d8d2d05e1970d99270ff9d5a6d8ee25e0b size: 954
[root@rancher-qa ms-zookeeper3.4.10]# docker images | grep zook
registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-zookeeper-ms latest cb1bea8cf3d5 8 days ago 567MB
registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-zookeeper-ms v1 cb1bea8cf3d5 8 days ago 567MB
ms/zookeeper3.4.10 latest cb1bea8cf3d5 8 days ago 567MB
ms/zookeeper3.4.10 v1 cb1bea8cf3d5 8 days ago 567MB
2.6查看
至此，tmp-zookeeper-ms镜像交付完成。
3.这里选择rancher来做docker集群的管理和编排，除了使用docker本身命令行界面启动Zookeeper容器外，推荐使用rancher UI界面进行容器管理和创建。
在rancher中，添加zk1、zk2、zk3容器服务：
创建zk1：
卷管理：
设置容器主机：
另两个znode节点，zk2、zk3同理操作，只是路径和名称做稍微改动。
进入Zookeeper容器中查看启动信息，查看Zookeeper机器znode2为集群leader：
二、创建config-service服务
集中配置服务config-service，作为公司微服务基础运行环境部分，需要优先单独创建。
为做好后期集中打包，使用maven工具，需先创建一maven镜像，该maven镜像集成了公司自己nexus服务，任何开发都可通过此镜像进行快速打包本地的开发环境的jar包。
Docker Rancher宿主机
1.下载apache-maven-3.3.9-bin.tar.gz包，自行下载。
创建maven构建build目录
mkdir -p /data/docker/maven3.3.9
ll
drwxr-xr-x 6 root root 99 Jan 13 15:36 apache-maven-3.3.9
-rw-r--r-- 1 root root 8491533 Jan 13 15:34 apache-maven-3.3.9-bin.tar.gz
-rw-r--r-- 1 root root 393 Jan 13 16:53 dockerfile
drwxr-xr-x 9 root root 268 Jan 13 15:43 jdk1.8.0_25
-rwxr-xr-x 1 root root 55 Jan 13 16:53 maven.sh
2.编写dockfile
cat dockerfile
FROM ms/jdk1.8:v1
MAINTAINER maven-3.3.9 "name@alaxiaoyou.com"
RUN mkdir /usr/local/maven-3.3.9/ #&& mkdir /usr/local/jdk1.8/ #因基于ms/jdk1.8:v1镜像，已有的jdk环境
ADD apache-maven-3.3.9/ /usr/local/maven-3.3.9/
#ADD jdk1.8.0_25/ /usr/local/jdk1.8/
ADD maven.sh /tmp/
ENV JAVA_HOME /usr/local/jdk1.8
ENV M2_HOME /usr/local/maven-3.3.9
ENV PATH $JAVA_HOME/bin:$M2_HOME/bin:$PATH
CMD /tmp/maven.sh
cat maven.sh
#!/bin/bash
cd /data/httpd/${msname}
mvn clean install
3.构建
[root@rancher-qa maven3.3.9]# docker build -t ms/maven-3.3.9 .
Sending build context to Docker daemon 327.2MB
Step 1/9 : FROM ms/jdk1.8:v1
---> 00d3c71ae0be
Step 2/9 : MAINTAINER maven-3.3.9 "yuhuanghui@alaxiaoyou.com"
---> Using cache
---> 80a6d05eae5a
Step 3/9 : RUN mkdir /usr/local/maven-3.3.9/ #&& mkdir /usr/local/jdk1.8/
---> Using cache
---> 92ac17c859a8
Step 4/9 : ADD apache-maven-3.3.9/ /usr/local/maven-3.3.9/
---> Using cache
---> fa81af79d732
Step 5/9 : ADD maven.sh /tmp/
---> Using cache
---> 034053775e26
Step 6/9 : ENV JAVA_HOME /usr/local/jdk1.8
---> Using cache
---> ad8e78b5a021
Step 7/9 : ENV M2_HOME /usr/local/maven-3.3.9
---> Running in cfae5d0a6e53
---> ccfcc8638e43
Removing intermediate container cfae5d0a6e53
Step 8/9 : ENV PATH $JAVA_HOME/bin:$M2_HOME/bin:$PATH
---> Running in 30b2f568c1a3
---> 27e68ef34a42
Removing intermediate container 30b2f568c1a3
Step 9/9 : CMD /tmp/maven.sh
---> Running in db48895f5502
---> 21c6f1a3b0cf
Removing intermediate container db48895f5502
Successfully built 21c6f1a3b0cf
Successfully tagged ms/maven-3.3.9:latest
[root@rancher-qa maven3.3.9]#
[root@rancher-qa maven3.3.9]# docker images | grep maven
ms/maven-3.3.9 latest 21c6f1a3b0cf 34 minutes ago 519MB
运行此maven镜像，打包命令示例：
[root@rancher-qa maven3.3.9]# docker run --rm -it -v /data/docker/ms-config/:/data/httpd/config-service/ -e msname=config-service ms/maven-3.3.9
说明：-v宿主机配置目录/data/docker/ms-config/映射到容器/data/httpd/config-service/，-e定义maven.sh脚本${msname}变量。
4.登录阿里云容器镜像服务
创建本地仓库名称ms-maven-3.3.9
5.镜像push到阿里云Docker Registry
切换到rancher/server
登录到阿里云Docker Registry
登录Docker Registry -> 打tag -> push到Docker Registry
[root@rancher-qa ms-jdk]# docker login --username=name@alaxiaoyou.com registry.cn-hangzhou.aliyuncs.com
Password: **********
Login Succeeded
[root@rancher-qa ms-jdk]#
[root@rancher-qa ms-jdk]# docker tag 21c6f1a3b0cf registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/ms-maven-3.3.9:latest
[root@rancher-qa ms-jdk]# docker push registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/ms-maven-3.3.9:latest
The push refers to a repository [registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/ms-maven-3.3.9]
607c588ba0d1: Pushed
2e4a77c00b58: Pushed
48c8f5464987: Pushed
96f6833b8de8: Mounted from xmbaby-tmp/tmp-zookeeper-ms
071d8bd76517: Mounted from xmbaby-tmp/tmp-zookeeper-ms
latest: digest: sha256:9ceac47cffbf0c35ed66212a042ad10f3905cae924033caf4cbca8cbf4dbf4dd size: 1367
查看：
至此，ms-maven-3.3.9镜像交付完成。此镜像交付完成后，后期基本无需改动，直接latest版本。
服务config-service镜像开始交付：
1.1准备集中配置项目alaxiaoyou-config-service-0.0.1-SNAPSHOT.jar包，gitlab仓库中。
创建config-service构建build目录
mkdir -p /data/httpd/ms-config-service-tmp
-rw-r--r-- 1 root root 276 Jan 14 17:34 dockerfile
drwxr-xr-x 2 root root 58 Jan 14 17:31 target
1.2 编写dockfile
cat /data/httpd/ms-config-service-tmp/dockerfile
FROM ms/jdk1.8:v1
MAINTAINER tmp-config-service "name@alaxiaoyou.com"
RUN mkdir -p /data/httpd/
ADD target/alaxiaoyou-config-service-0.0.1-SNAPSHOT.jar /data/httpd/
WORKDIR /data/httpd/
ENTRYPOINT java -Xmx128m -Xss512k -jar alaxiaoyou-config-service-0.0.1-SNAPSHOT.jar
说明：ENTRYPOINT进入容器中执行此jar包。
1.3 构建，镜像
docker build -t ms/config-service .
Sending build context to Docker daemon 21.2MB
Step 1/6 : FROM ms/jdk1.8:v1
---> 00d3c71ae0be
Step 2/6 : MAINTAINER tmp-config-service "yuhuanghui@alaxiaoyou.com"
---> Running in a3e0038610ff
---> 75d7642e16ec
Removing intermediate container a3e0038610ff
Step 3/6 : RUN mkdir -p /data/httpd/
---> Running in 4b1ff33f58df
---> f43b916f6835
Removing intermediate container 4b1ff33f58df
Step 4/6 : ADD target/alaxiaoyou-config-service-0.0.1-SNAPSHOT.jar /data/httpd/
---> 99608e52e219
Removing intermediate container 0bd4d9130dd0
Step 5/6 : WORKDIR /data/httpd/
---> 656a442c7ac2
Removing intermediate container d18fbdc1c6a6
Step 6/6 : ENTRYPOINT java -Xmx128m -Xss512k -jar alaxiaoyou-config-service-0.0.1-SNAPSHOT.jar
---> Running in 0371f9addb5d
---> c7375c40286e
Removing intermediate container 0371f9addb5d
Successfully built c7375c40286e
Successfully tagged ms/config-service:latest
[root@rancher-qa ms-config-service-tmp]# pwd
/data/httpd/ms-config-service-tmp
[root@rancher-qa ms-config-service-tmp]# docker images | grep config
ms/config-service latest c7375c40286e 2 minutes ago 530MB
registry.cn-hangzhou.aliyuncs.com/xmbaby-pre/ms-config latest 51a4521d7581 24 months ago 578MB
1.4 登录阿里云容器镜像服务
创建镜像本地仓库名称tmp-config-service-ms
1.5 镜像push到阿里云Docker Registry
切换到rancher/server
登录到阿里云Docker Registry
登录Docker Registry -> 打tag -> push到Docker Registry
[root@rancher-qa ms-config-service-tmp]# docker login --username=name@alaxiaoyou.com registry.cn-hangzhou.aliyuncs.com
Password: ******
Login Succeeded
[root@rancher-qa ms-config-service-tmp]# docker tag c7375c40286e registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-config-service-ms:latest
[root@rancher-qa ms-config-service-tmp]#
[root@rancher-qa ms-config-service-tmp]# docker push registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-config-service-ms:latest
The push refers to a repository [registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-config-service-ms]
76925e259a39: Pushed
d31d3604ba1d: Pushed
96f6833b8de8: Mounted from xmbaby-tmp/ms-maven-3.3.9
071d8bd76517: Mounted from xmbaby-tmp/ms-maven-3.3.9
latest: digest: sha256:78c0489e045a1a9a7220ea941ca8b7fd6db348e5423e478a45ac2bbc2117c180 size: 1161
至此，tmp-config-service-ms镜像交付完成。
tmp-config-service-ms镜像启动，统一用rancher编排UI工具来启动。
tmp-config-service-ms服务启动需依赖宿主机的目录，这个目录，是本地git仓库项目，gitlab中为：git@xxxx.git。provider配置修改，都通过gitlab进行修改，会进行更新到本地目录中，重启此provider即可生效。
2.1 启动tmp-config-service-ms服务，rancher中操作。
创建服务tmp-config-service-ms：
设置卷：
设置容器主机名：
2.2 启动tmp-config-service-ms容器服务。此provider只在启动初，会找一次config-service，但此config-service服务为单点服务。不过，容器可快速销毁和生成的特性，即使此config-service配置服务出现问题，也可立即自动重启或手工销毁有问题的容器，并重新生成新的config-service服务容器，此过程为秒级，是可接受配置服务为单点。
进入config-service服务容器，查看启动情况，日志查看：
三、创建gateway-service服务
网关gateway-service服务是整个微服务架构的入口，在构建provider前，必须建立先创建好网关服务。
git clone网关项目代码，git@xxxx.git
1.创建网关项目目录：
mkdir -p /data/httpd/ms-api-gateway-tmp/alaxiaoyou-api-gateway
[root@rancher-qa ms-api-gateway-tmp]# git clone git@xxxxx.git
Cloning into 'alaxiaoyou-api-gateway'...
remote: Counting objects: 1198, done.
remote: Compressing objects: 100% (552/552), done.
remote: Total 1198 (delta 423), reused 554 (delta 241)
Receiving objects: 100% (1198/1198), 108.00 KiB | 0 bytes/s, done.
Resolving deltas: 100% (423/423), done.
[root@rancher-qa ms-api-gateway-tmp]#
[root@rancher-qa ms-api-gateway-tmp]# ll
total 0
drwxr-xr-x 4 root root 44 Jan 14 19:10 alaxiaoyou-api-gateway
[root@rancher-qa ms-api-gateway-tmp]# pwd
/data/httpd/ms-api-gateway-tmp
[root@rancher-qa ms-api-gateway-tmp]# cd alaxiaoyou-api-gateway/
[root@rancher-qa alaxiaoyou-api-gateway]#
[root@rancher-qa alaxiaoyou-api-gateway]# ll
total 8
-rw-r--r-- 1 root root 4811 Jan 14 19:10 pom.xml
drwxr-xr-x 3 root root 18 Jan 14 19:10 src
[root@rancher-qa alaxiaoyou-api-gateway]#
[root@rancher-qa alaxiaoyou-api-gateway]# pwd
/data/httpd/ms-api-gateway-tmp/alaxiaoyou-api-gateway
在gateway-service项目目录下，运行网关代码打包命令：
docker run --rm -it -v /data/httpd/ms-api-gateway-tmp/alaxiaoyou-api-gateway:/data/httpd/gateway-service/ -e msname=gateway-service ms/maven-3.3.9
[root@rancher-qa alaxiaoyou-api-gateway]# docker run --rm -it -v /data/httpd/ms-api-gateway-tmp/alaxiaoyou-api-gateway:/data/httpd/gateway-service/ -e msname=gateway-service ms/maven-3.3.9
[root@rancher-qa alaxiaoyou-api-gateway]# ll
total 58436
-rw-r--r-- 1 root root 59823092 Jan 14 19:27 alaxiaoyou-api-gateway-0.0.1-SNAPSHOT.jar
-rw-r--r-- 1 root root 343 Jan 14 19:28 dockerfile
drwxr-xr-x 3 root root 20 Jan 14 19:28 gateway-service
-rw-r--r-- 1 root root 4811 Jan 14 19:10 pom.xml
drwxr-xr-x 3 root root 18 Jan 14 19:10 src
此打包命令，目前并未成功将包alaxiaoyou-api-gateway-0.0.1-SNAPSHOT.jar打出，该包从其他机器cp过来。待解决。
2.创建网关项目dockerfile
vim /data/httpd/ms-api-gateway-tmp/alaxiaoyou-api-gateway/dockerfile
FROM ms/jdk1.8:v1
MAINTAINER gateway-service "name@alaxiaoyou.com"
RUN mkdir /data/httpd/ -p
ADD gateway-service/target/alaxiaoyou-api-gateway-0.0.1-SNAPSHOT.jar /data/httpd/
EXPOSE 80 #此处虽然开启了80端口映射，但是并没有做link链接
WORKDIR /data/httpd/
ENTRYPOINT java -jar alaxiaoyou-api-gateway-0.0.1-SNAPSHOT.jar
说明：ENTRYPOINT进入容器中执行此jar包。
3.构建，镜像
[root@rancher-qa alaxiaoyou-api-gateway]# docker build -t ms/tmp-gateway-service .
Sending build context to Docker daemon 60.27MB
Step 1/7 : FROM ms/jdk1.8:v1
---> 00d3c71ae0be
Step 2/7 : MAINTAINER gateway-service "yuhuanghui@alaxiaoyou.com"
---> Using cache
---> bf3f97f0bda2
Step 3/7 : RUN mkdir -p /data/httpd/
---> Running in da244cb64552
---> 743c35c3c4d8
Removing intermediate container da244cb64552
Step 4/7 : ADD gateway-service/target/alaxiaoyou-api-gateway-0.0.1-SNAPSHOT.jar /data/httpd/
---> 9e45fe4b20a4
Removing intermediate container 8e3022556068
Step 5/7 : EXPOSE 80
---> Running in e4dbaaa58778
---> 299398d4af46
Removing intermediate container e4dbaaa58778
Step 6/7 : WORKDIR /data/httpd/
---> 2e6bc4bdf39d
Removing intermediate container 8428111522be
Step 7/7 : ENTRYPOINT java -jar alaxiaoyou-api-gateway-0.0.1-SNAPSHOT.jar
---> Running in 8ce9968b7bef
---> c2f59d36052d
Removing intermediate container 8ce9968b7bef
Successfully built c2f59d36052d
Successfully tagged ms/tmp-gateway-service:latest
[root@rancher-qa alaxiaoyou-api-gateway]#
[root@rancher-qa alaxiaoyou-api-gateway]# docker images|grep gate
ms/tmp-gateway-service latest c2f59d36052d 16 seconds ago 569MB
registry.cn-hangzhou.aliyuncs.com/xmbaby-test/test-gateway-ms latest d86bef9f01e9 14 months ago 617MB
4.登录阿里云容器镜像服务
创建本地仓库名称：tmp-gateway-service-ms
5.镜像push到阿里云Docker Registry
切换到rancher/server
登录到阿里云Docker Registry
登录Docker Registry -> 打tag -> push到Docker Registry
[root@rancher-qa alaxiaoyou-api-gateway]# docker login --username=name@alaxiaoyou.com registry.cn-hangzhou.aliyuncs.com
Password:
Login Succeeded
[root@rancher-qa alaxiaoyou-api-gateway]# docker tag c2f59d36052d registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-gateway-service-ms
[root@rancher-qa alaxiaoyou-api-gateway]#
[root@rancher-qa alaxiaoyou-api-gateway]# docker push registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-gateway-service-ms
The push refers to a repository [registry.cn-hangzhou.aliyuncs.com/xmbaby-tmp/tmp-gateway-service-ms]
29ffcfda7ded: Pushed
202759902df6: Pushed
96f6833b8de8: Mounted from xmbaby-tmp/tmp-config-service-ms
071d8bd76517: Mounted from xmbaby-tmp/tmp-config-service-ms
latest: digest: sha256:825a0ec026c1f7c6eea01c2e5236c42dba11209b17ccd2ffad2b314c99b58b2d size: 1161
6.镜像查看：
至此，gateway-service-ms镜像交付完成。
用rancher编排UI工具来启动gateway-service：
1.进入rancher应用栈添加服务。因为网关gateway服务需映射80端口至宿主机，因此，创建容器选择“总是在每台主机上运行一个此容器的实例”。映射80端口。添加关联的目标服务。
网关服务gateway-service启动会连接关联的目标服务config-service，config-service是通过git管理的config配置项目来获取配置信息给网关服务。关联Zookeeper集群注册服务。
2.自动重启选择“从不(仅启动一次)”：
3.对于网关服务，可使用docker本身来管理内存分配，可进行动态调整：
4.进入容器查看gateway-service服务启动。
自此，网关服务gateway-service添加完成
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