Docker微服務(wù)-鏡像構(gòu)建交付和使用rancher進(jìn)行容器創(chuàng)建管理

先來(lái)架構(gòu)，如圖：

1.前端出口服務(wù)為阿里SLB
2.Zookeeper集群為整個(gè)微服務(wù)環(huán)境提供注冊(cè)中心，Zookeeper集群每個(gè)znode的IP固定，也同樣由config-service服務(wù)配置。
3.集中配置服務(wù)config-service，由git集中管理配置文件，config-service配置映射宿主機(jī)某個(gè)目錄。配置如需修改直接Git中修改，觸發(fā)宿主機(jī)映射的目錄中進(jìn)行g(shù)it pull操作，然后重啟對(duì)應(yīng)的provider，配置即可生效。
4.facade作為分發(fā)器做分發(fā)服務(wù)。

微服務(wù)工作流程：
1)provider啟動(dòng)，讀取寫(xiě)死的config-service配置服務(wù)，從配置服務(wù)中獲取到Zookeeper地址，進(jìn)行注冊(cè)。
2)請(qǐng)求由阿里SLB分發(fā)至對(duì)應(yīng)微服務(wù)facade，網(wǎng)關(guān)前往Zookeeper集群注冊(cè)中心獲取可用服務(wù)。
3)獲取到可用provider后，facade進(jìn)行分發(fā)請(qǐng)求，策略為輪詢。
4)如后端provider掛了，無(wú)法提供服務(wù)，Zookeeper會(huì)自動(dòng)剔除該服務(wù)的注冊(cè)。

建立微服務(wù)基礎(chǔ)運(yùn)行環(huán)境，gateway網(wǎng)關(guān)、Zookeeper注冊(cè)中心、config-service配置基礎(chǔ)運(yùn)行環(huán)境。開(kāi)始構(gòu)建以上基礎(chǔ)運(yùn)行環(huán)境：

一、創(chuàng)建zookeeper3.4.10集群服務(wù)

需包含了jdk和配置好環(huán)境變量的鏡像，jdk1.8鏡像。
jdk1.8鏡像交付到阿里云Docker Registry倉(cāng)庫(kù)

Docker Rancher宿主機(jī)

1.下載jdk1.8.0_25.tar包，自行下載。
創(chuàng)建jdk構(gòu)建build目錄

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.編寫(xiě)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.構(gòu)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.登錄阿里云容器鏡像服務(wù)
創(chuàng)建鏡像倉(cāng)庫(kù)名稱ms-jdk1.8

5.鏡像push到阿里云Docker Registry
切換到rancher/server
登錄到阿里云Docker Registry
登錄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鏡像交付完成。

zookeeper3.4.10集群創(chuàng)建，并將Zookeeper3.4.10鏡像交付到阿里云Docker Registry倉(cāng)庫(kù)。

1.zookeeper3.4.10集群構(gòu)建前提準(zhǔn)備：

zookeeper3.4.10集群需其配置文件中指定各個(gè)選舉節(jié)點(diǎn)的ip和端口，并且zookeeper集群中的datadir（zoo.cfg配置中：dataDir=/tmp/zookeeper）中，需指定節(jié)點(diǎn)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，需要解決：
1).myid問(wèn)題。
2).Zookeeper集群節(jié)點(diǎn)（leader、follower）選舉配置。

可使用docker內(nèi)置的volume功能，將配置文件和Zookeeper的datadir映射至宿主機(jī)進(jìn)行管理。
如在rancher中：

所以，宿主機(jī)必須存在：
1) zookeeper-config/，目錄為Zookeeper所有配置文件，包含集群的選舉節(jié)點(diǎn)IP和選舉端口，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/，目錄對(duì)應(yīng)zookeeper集群中的datadir，有存放一個(gè)myid文件，Zookeeper集群?jiǎn)?dòng)后產(chǎn)生的數(shù)據(jù)也會(huì)持久化到此宿主機(jī)目錄下。Zookeeper集群有3個(gè)znode節(jié)點(diǎn)，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.鏡像構(gòu)建

2.1 下載zookeeper-3.4.10.tar.gz包
wget https://mirrors.cnnic.cn/apache/zookeeper/zookeeper-3.4.10/zookeeper-3.4.10.tar.gz
創(chuàng)建zookeeper-3.4.10構(gòu)建build目錄

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 編寫(xiě)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目錄添加至鏡像中，然后交付。但只是一個(gè)Zookeeper運(yùn)行的模板，具體配置可通過(guò)volume，用宿主機(jī)的配置覆蓋鏡像中的配置。

2.3 構(gòu)建，鏡像

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

鏡像運(yùn)行，本地docker本身命令行啟動(dòng)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命令行啟動(dòng)卷映射目錄正常，宿主機(jī)目錄能映射到容器中。但rancher中用UI界面進(jìn)行卷映射時(shí)，發(fā)現(xiàn)宿主機(jī)映射的目錄在容器中并未映射到。待解決。

此問(wèn)題是由于，rancher有兩臺(tái)主機(jī)，而容器都運(yùn)行在未進(jìn)行設(shè)置映射目錄的宿主機(jī)中。此問(wèn)題困擾近一周時(shí)間，<_>

2.4 登錄阿里云容器鏡像服務(wù)
創(chuàng)建鏡像倉(cāng)庫(kù)名稱tmp-zookeeper-ms

2.5 zookeeper鏡像push到阿里云Docker Registry
切換到rancher/server
登錄到阿里云Docker Registry
登錄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鏡像交付完成。

3.這里選擇rancher來(lái)做docker集群的管理和編排，除了使用docker本身命令行界面啟動(dòng)Zookeeper容器外，推薦使用rancher UI界面進(jìn)行容器管理和創(chuàng)建。
在rancher中，添加zk1、zk2、zk3容器服務(wù)：

創(chuàng)建zk1：

卷管理：

設(shè)置容器主機(jī)：

另兩個(gè)znode節(jié)點(diǎn)，zk2、zk3同理操作，只是路徑和名稱做稍微改動(dòng)。

進(jìn)入Zookeeper容器中查看啟動(dòng)信息，查看Zookeeper機(jī)器znode2為集群leader：

二、創(chuàng)建config-service服務(wù)

集中配置服務(wù)config-service，作為公司微服務(wù)基礎(chǔ)運(yùn)行環(huán)境部分，需要優(yōu)先單獨(dú)創(chuàng)建。
為做好后期集中打包，使用maven工具，需先創(chuàng)建一maven鏡像，該maven鏡像集成了公司自己nexus服務(wù)，任何開(kāi)發(fā)都可通過(guò)此鏡像進(jìn)行快速打包本地的開(kāi)發(fā)環(huán)境的jar包。
Docker Rancher宿主機(jī)

1.下載apache-maven-3.3.9-bin.tar.gz包，自行下載。
創(chuàng)建maven構(gòu)建build目錄

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.編寫(xiě)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鏡像，已有的jdk環(huán)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.構(gòu)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

運(yùn)行此maven鏡像，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

說(shuō)明：-v宿主機(jī)配置目錄/data/docker/ms-config/映射到容器/data/httpd/config-service/，-e定義maven.sh腳本${msname}變量。

4.登錄阿里云容器鏡像服務(wù)
創(chuàng)建本地倉(cāng)庫(kù)名稱ms-maven-3.3.9

5.鏡像push到阿里云Docker Registry
切換到rancher/server
登錄到阿里云Docker Registry
登錄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鏡像交付完成。此鏡像交付完成后，后期基本無(wú)需改動(dòng)，直接latest版本。

服務(wù)config-service鏡像開(kāi)始交付：

1.1準(zhǔn)備集中配置項(xiàng)目alaxiaoyou-config-service-0.0.1-SNAPSHOT.jar包，gitlab倉(cāng)庫(kù)中。
創(chuàng)建config-service構(gòu)建build目錄

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 編寫(xiě)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

說(shuō)明：ENTRYPOINT進(jìn)入容器中執(zhí)行此jar包。

1.3 構(gòu)建，鏡像

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 登錄阿里云容器鏡像服務(wù)
創(chuàng)建鏡像本地倉(cāng)庫(kù)名稱tmp-config-service-ms

1.5 鏡像push到阿里云Docker Registry
切換到rancher/server
登錄到阿里云Docker Registry
登錄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鏡像交付完成。

2. tmp-config-service-ms鏡像啟動(dòng)，統(tǒng)一用rancher編排UI工具來(lái)啟動(dòng)。
   tmp-config-service-ms服務(wù)啟動(dòng)需依賴宿主機(jī)的目錄，這個(gè)目錄，是本地git倉(cāng)庫(kù)項(xiàng)目，gitlab中為：git@xxxx.git。provider配置修改，都通過(guò)gitlab進(jìn)行修改，會(huì)進(jìn)行更新到本地目錄中，重啟此provider即可生效。

2.1 啟動(dòng)tmp-config-service-ms服務(wù)，rancher中操作。
創(chuàng)建服務(wù)tmp-config-service-ms：

設(shè)置卷：

設(shè)置容器主機(jī)名：

2.2 啟動(dòng)tmp-config-service-ms容器服務(wù)。此provider只在啟動(dòng)初，會(huì)找一次config-service，但此config-service服務(wù)為單點(diǎn)服務(wù)。不過(guò)，容器可快速銷毀和生成的特性，即使此config-service配置服務(wù)出現(xiàn)問(wèn)題，也可立即自動(dòng)重啟或手工銷毀有問(wèn)題的容器，并重新生成新的config-service服務(wù)容器，此過(guò)程為秒級(jí)，是可接受配置服務(wù)為單點(diǎn)。
進(jìn)入config-service服務(wù)容器，查看啟動(dòng)情況，日志查看：

三、創(chuàng)建gateway-service服務(wù)

網(wǎng)關(guān)gateway-service服務(wù)是整個(gè)微服務(wù)架構(gòu)的入口，在構(gòu)建provider前，必須建立先創(chuàng)建好網(wǎng)關(guān)服務(wù)。
git clone網(wǎng)關(guān)項(xiàng)目代碼，git@xxxx.git

1.創(chuàng)建網(wǎng)關(guān)項(xiàng)目目錄：
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項(xiàng)目目錄下，運(yùn)行網(wǎng)關(guān)代碼打包命令：

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，目前并未成功將包alaxiaoyou-api-gateway-0.0.1-SNAPSHOT.jar打出，該包從其他機(jī)器cp過(guò)來(lái)。待解決。

2.創(chuàng)建網(wǎng)關(guān)項(xiàng)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  #此處雖然開(kāi)啟了80端口映射，但是并沒(méi)有做link鏈接
WORKDIR /data/httpd/
ENTRYPOINT java -jar alaxiaoyou-api-gateway-0.0.1-SNAPSHOT.jar

說(shuō)明：ENTRYPOINT進(jìn)入容器中執(zhí)行此jar包。

3.構(gòu)建，鏡像

[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.登錄阿里云容器鏡像服務(wù)
創(chuàng)建本地倉(cāng)庫(kù)名稱：tmp-gateway-service-ms

5.鏡像push到阿里云Docker Registry
切換到rancher/server
登錄到阿里云Docker Registry
登錄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.鏡像查看：

至此，gateway-service-ms鏡像交付完成。

用rancher編排UI工具來(lái)啟動(dòng)gateway-service：

1.進(jìn)入rancher應(yīng)用棧添加服務(wù)。因?yàn)榫W(wǎng)關(guān)gateway服務(wù)需映射80端口至宿主機(jī)，因此，創(chuàng)建容器選擇“總是在每臺(tái)主機(jī)上運(yùn)行一個(gè)此容器的實(shí)例”。映射80端口。添加關(guān)聯(lián)的目標(biāo)服務(wù)。
網(wǎng)關(guān)服務(wù)gateway-service啟動(dòng)會(huì)連接關(guān)聯(lián)的目標(biāo)服務(wù)config-service，config-service是通過(guò)git管理的config配置項(xiàng)目來(lái)獲取配置信息給網(wǎng)關(guān)服務(wù)。關(guān)聯(lián)Zookeeper集群注冊(cè)服務(wù)。

2.自動(dòng)重啟選擇“從不(僅啟動(dòng)一次)”：

3.對(duì)于網(wǎng)關(guān)服務(wù)，可使用docker本身來(lái)管理內(nèi)存分配，可進(jìn)行動(dòng)態(tài)調(diào)整：

4.進(jìn)入容器查看gateway-service服務(wù)啟動(dòng)。

自此，網(wǎng)關(guān)服務(wù)gateway-service添加完成