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Docker in EC2
Jan 13, 2019
  • SpringBoot

AWS ec2에 Docker 설치부터 배포하기

  1. EC2 인스턴스 생성
  2. Xshell에 ssh port 22 로 연결
  3. user 생성하기 
    $ adduser root
  4. EC2에 Docker 설치하기 ```shell $ sudo yum update -y $ sudo yum install -y docker Loaded plugins: priorities, update-motd, upgrade-helper amzn-main | 2.1 kB 00:00:00
    amzn-updates | 2.5 kB 00:00:00
    Resolving Dependencies –> Running transaction check —> Package docker.x86_64 0:18.06.1ce-5.22.amzn1 will be installed –> Processing Dependency: xfsprogs for package: docker-18.06.1ce-5.22.amzn1.x86_64 –> Processing Dependency: pigz for package: docker-18.06.1ce-5.22.amzn1.x86_64 –> Processing Dependency: libseccomp.so.2()(64bit) for package: docker-18.06.1ce-5.22.amzn1.x86_64 –> Processing Dependency: libltdl.so.7()(64bit) for package: docker-18.06.1ce-5.22.amzn1.x86_64 –> Running transaction check —> Package libseccomp.x86_64 0:2.3.1-2.4.amzn1 will be installed —> Package libtool-ltdl.x86_64 0:2.4.2-20.4.8.5.32.amzn1 will be installed —> Package pigz.x86_64 0:2.3.3-1.6.amzn1 will be installed —> Package xfsprogs.x86_64 0:4.5.0-9.21.amzn1 will be installed –> Finished Dependency Resolution

Dependencies Resolved

====================================================================================================== Package Arch Version Repository Size ====================================================================================================== Installing: docker x86_64 18.06.1ce-5.22.amzn1 amzn-updates 45 M Installing for dependencies: libseccomp x86_64 2.3.1-2.4.amzn1 amzn-main 79 k libtool-ltdl x86_64 2.4.2-20.4.8.5.32.amzn1 amzn-main 51 k pigz x86_64 2.3.3-1.6.amzn1 amzn-main 71 k xfsprogs x86_64 4.5.0-9.21.amzn1 amzn-main 1.7 M

Transaction Summary

Install 1 Package (+4 Dependent packages)

Total download size: 47 M Installed size: 154 M Downloading packages: (1/5): libtool-ltdl-2.4.2-20.4.8.5.32.amzn1.x86_64.rpm | 51 kB 00:00:00
(2/5): libseccomp-2.3.1-2.4.amzn1.x86_64.rpm | 79 kB 00:00:00
(3/5): pigz-2.3.3-1.6.amzn1.x86_64.rpm | 71 kB 00:00:00
(4/5): xfsprogs-4.5.0-9.21.amzn1.x86_64.rpm | 1.7 MB 00:00:00
(5/5): docker-18.06.1ce-5.22.amzn1.x86_64.rpm | 45 MB 00:00:05
—————————————————————————————————— Total 8.0 MB/s | 47 MB 00:00:05
Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : libseccomp-2.3.1-2.4.amzn1.x86_64 1/5 Installing : libtool-ltdl-2.4.2-20.4.8.5.32.amzn1.x86_64 2/5 Installing : pigz-2.3.3-1.6.amzn1.x86_64 3/5 Installing : xfsprogs-4.5.0-9.21.amzn1.x86_64 4/5 Installing : docker-18.06.1ce-5.22.amzn1.x86_64 5/5 Verifying : xfsprogs-4.5.0-9.21.amzn1.x86_64 1/5 Verifying : pigz-2.3.3-1.6.amzn1.x86_64 2/5 Verifying : libtool-ltdl-2.4.2-20.4.8.5.32.amzn1.x86_64 3/5 Verifying : docker-18.06.1ce-5.22.amzn1.x86_64 4/5 Verifying : libseccomp-2.3.1-2.4.amzn1.x86_64 5/5

Installed: docker.x86_64 0:18.06.1ce-5.22.amzn1

Dependency Installed: libseccomp.x86_64 0:2.3.1-2.4.amzn1 libtool-ltdl.x86_64 0:2.4.2-20.4.8.5.32.amzn1
pigz.x86_64 0:2.3.3-1.6.amzn1 xfsprogs.x86_64 0:4.5.0-9.21.amzn1

Complete!


5. Docker 실행
```shell
$ sudo service docker start
Starting cgconfig service:                                 [  OK  ]
Starting docker:	.                                  [  OK  ]


$ sudo usermod -a -G docker $USER

$USER = root(혹은 ec2-user) sudo 없이 사용하기 위해 docker그룹에 sudo 를 추가

  1. Docker 에 Tomcat 설치 
    $ docker pull tomcat:8      #톰캣 설치
$ docker images             #이미지 확인
$ docker run -d -i -t -p 8080:8080 tomcat:8     #실행
$ docker ps                 #실행 확인
$ docker restart $ID
$ docker rmi $Image_ID      #이미지 삭제

    tomcat 실행시 -d : demon으로 실행한다 -p : 8081:8080 -> 이미지를 8080으로 실행하지만, 호스트에서 접근시 8081로 접근한다 -i : 표준 입력을 활성화하여 컨테이너와 연결되어있지 않더라도 표준 입력을 활성화한다.

Docker File

Each instruction creates one layer:

  • FROM creates a layer from the ubuntu:15.04 Docker image.
  • COPY adds files from your Docker client’s current directory.
  • RUN builds your application with make.
  • CMD specifies what command to run within the container.
$ vi DockerFile

FROM tomcat:8
MAINTAINER dy1dy2@gmail.com
COPY demo-0.0.1-SNAPSHOT.war /usr/local/tomcat/lib/
EXPOSE 8080
  1. Deploy War file
    • Dependency 추가
    • 컨테이너가 탑재된 단독형 앱을 확장 간으한 형태로 유지할 수 있다.
    • WEB-INF/lib-provided 에 톰캣 라이브러리가 들어간다.
    • 톰캣 라이브러리가 WEB-INF/lib 에 들어가면 JAR파일이 충돌하면서 컨테이너가 시동 실패한다. 
          <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-tomcat</artifactId>
      <scope>provided</scope>
  </dependency>

        - packaging 추가 ```xml
    war 
             - Main App 수정
   + WAR파일에서 SpringApplication을 실행하는 WebApplicationInitializer 인터페이스를 스프링 부터에 맞게 구현한 클래스, 애플리케이션 컨텍스트로부터 서블릿, 필터, ServletContextInitializer 빈을 서블릿 컨테이너에 바인딩한다. 
```java
@SpringBootApplication
public class DemoApplication extends SpringBootServletInitializer {

 @Override
 protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
     return builder.sources(DemoApplication.class);
 }

 public static void main(String[] args) {
     SpringApplication.run(DemoApplication.class, args);
 }
}

         - Packaging ```shell mvn clean package -DskipTests=true #    mvn clean install spring-boot:repackage -DskipTests=true ``` + install 을 하는 이유 오류 발생 ```shell :repackage failed: Source file must be provided -> [Help 1] ```  spring-boot-maven-plugin 을 .m2 folder로 다운로드 하는중 이슈가 있는듯. m2\repository 에 있는 것을 삭제하고 재설치하는 작업이 필요.
   - war 파일로 변경하고싶은 경우:  https://www.reimaginer.me/entry/Spring-Boot-jar-to-war
  2. FTP 사용 vsftpd를 설치한다(Very Secured FTPD) : 우분투에서 기본적으로 제공되는 ftp 서버 
    $ sudo yum install vsftpd
  • fileZila 다운로드 후 SFTP 로 연결. (22번포트 사용: SSH File Transfer Protocol 이기때문)
  • 해당 root 폴더에 war 파일 복사
  • 해당 root 폴더에 Dockerfile 같이 있어야함.
  1. docker build
[root@ip ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
tomcat              8                   1a51cb5e3006        2 weeks ago         462MB
[root@ip ~]# docker build -t tomcat_test .
Sending build context to Docker daemon  20.06MB
Step 1/4 : FROM tomcat:8
 ---> 1a51cb5e3006
Step 2/4 : MAINTAINER dy1dy2@gmail.com
 ---> Running in 86d231eec71d
Removing intermediate container 86d231eec71d
 ---> fb4c81959c6c
Step 3/4 : COPY demo-0.0.1-SNAPSHOT.war /usr/local/tomcat/lib/
 ---> 406e47b1ac22
Step 4/4 : EXPOSE 8080
 ---> Running in 49280248ae76
Removing intermediate container 49280248ae76
 ---> b372aa986c86
Successfully built b372aa986c86
Successfully tagged tomcat_test:latest
[root@ip ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
tomcat_test         latest              b372aa986c86        4 seconds ago       483MB
tomcat              8                   1a51cb5e3006        2 weeks ago         462MB

마지막 . 은 dockerfile이 있는 장소인듯?

  1. Docker Run 
    [root@ip ~]# docker run -d -i -t --name="tomcat_test_container" -p 8080:8080 -v demo-0.0.1-SNAPSHOT.war:/usr/local/tomcat/webapps/demo-0.0.1-SNAPSHOT.war tomcat_test
c716f7e9fdf11a1c00c21ba1dea568f5fdb1b021372f048cc8746f1807b7bab4

    -v ~파일을 /usr/local/tomcat/webaps/~ 로 copy하겠다. -p : 8081:8080 -> 이미지를 8080으로 실행하지만, 호스트에서 접근시 8081로 접근한다 ```shell [root@ip ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES c716f7e9fdf1 tomcat_test “catalina.sh run” 55 seconds ago Up 53 seconds 0.0.0.0:8080->8080/tcp tomcat_test_container d55adc6a242c tomcat:8 “catalina.sh run” 2 hours ago Up 2 hours 0.0.0.0:8081->8080/tcp tomcat8-board

[root@ip ~]# docker exec -i -t tomcat_test_container /bin/bash root@c716f7e9fdf1:/usr/local/tomcat# ls -al webapps/ total 36 drwxr-xr-x 1 root root 4096 Jan 13 14:30 . drwxr-sr-x 1 root staff 4096 Dec 29 11:48 .. drwxr-xr-x 3 root root 4096 Dec 29 11:48 ROOT drwxr-xr-x 2 root root 4096 Jan 13 14:29 demo-0.0.1-SNAPSHOT.war drwxr-xr-x 14 root root 4096 Dec 29 11:48 docs drwxr-xr-x 6 root root 4096 Dec 29 11:48 examples drwxr-xr-x 5 root root 4096 Dec 29 11:48 host-manager drwxr-xr-x 5 root root 4096 Dec 29 11:48 manager root@c716f7e9fdf1:/usr/local/tomcat# exit exit

webapps에 파일이 들어가있는지 확인 가능. 

```shell
docker stop tomcat_test_container
docker rm tomcat_test_container

[1] Docker : http://tech.cloudz-labs.io/posts/docker/docker-start/ [2] 도커파일 참고해볼 사이트 : https://jistol.github.io/docker/2017/09/19/docker-compose-tomcat-clustering/