Docker의 모든 것
Docker 처음과 끝.
docker run
| 값 | 설명 |
|---|---|
-i |
키보드 입력을 컨테이너의 표준 입력에 연결하여 키보드 입력을 컨테이너의 셀 등에 보낸다. |
-t |
터미널을 통해 대화형 조작이 가능하게 한다. |
-d |
백그라운드로 컨테이너를 돌려 터미널과 연결하지 않는다. |
--name |
컨테이너에 이름을 설정한다. 시스템에서 유일한 이름이어야 하며, 옵션을 생략하면 자동으로 만들어진 이름이 부여된다. |
--rm |
컨테이너가 종료하면 종료 상태의 컨테이너를 자동으로 삭제한다. |
docker stop
정상적인 종료를 실행한다.
docker kill
kill은 정상적인 종료가 원활하지 못한 경우 종료하기 위해 사용된다. (stop를 권장)
[ 1번 터미널 ]
// stop에서 사용 (6d4fd22c3865)
snoopy_kr@Leeui-iMac ~ % docker run -it ubuntu bash
root@6d4fd22c3865:/# exit
[ 2번 터미널 ]
// kill에서 사용 (3e98a3014884)
snoopy_kr@Leeui-iMac ~ % docker run -it ubuntu bash
root@3e98a3014884:/#
[ 3번 터미널 ]
snoopy_kr@Leeui-iMac ~ % docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3e98a3014884 ubuntu "bash" 9 seconds ago Up 11 seconds priceless_dijkstra
6d4fd22c3865 ubuntu "bash" 2 minutes ago Up 7 seconds focused_bardeen
snoopy_kr@Leeui-iMac ~ % docker stop 6d4fd22c3865
6d4fd22c3865
snoopy_kr@Leeui-iMac ~ % docker kill 3e98a3014884
3e98a3014884
snoopy_kr@Leeui-iMac ~ % docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3e98a3014884 ubuntu "bash" 24 seconds ago Exited (137) 3 seconds ago priceless_dijkstra
6d4fd22c3865 ubuntu "bash" 2 minutes ago Exited (0) 49 seconds ago focused_bardeen
STATUS 부분을 보면 Exited (137), Exited (0)로 정상 종료와 비정상 종료 상태가 다른 것을 확인할 수 있다.
docker start
정지 상태인 컨테이너를 재기동 한다.
snoopy_kr@Leeui-iMac ~ % docker start -i 3e98a3014884
root@3e98a3014884:/#
// 다음을 위한 준비
root@3e98a3014884:/# apt update
// <생략>
root@3e98a3014884:/# apt install git
// <생략>
-i로 표준출력, 표준에러를 터메널에 표시하도록 한다.
docker commit
새로운 도커 이미지 생성한다.
snoopy_kr@Leeui-iMac ~ % docker diff 3e98a3014884
// 중간 생략...
C /var/cache
C /var/cache/debconf
C /var/cache/debconf/config.dat
A /var/cache/debconf/config.dat-old
C /var/cache/debconf/templates.dat
A /var/cache/debconf/templates.dat-old
C /var/cache/ldconfig
C /var/cache/ldconfig/aux-cache
snoopy_kr@Leeui-iMac ~ % docker commit 3e98a3014884 ubuntu:git
sha256:99edbc97d61da96ec2c6c4a5d30fe5dac0450eacabad0b6e8c33b27a3023d74d
snoopy_kr@Leeui-iMac ~ % docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu git 99edbc97d61d 29 seconds ago 207MB
ubuntu latest ba6acccedd29 7 weeks ago 72.8MB
diff를 사용해 변경된 내용을 확인할 수 있고, 이미지를 보면 사이즈가 변경된 것을 확인할 수 있다.
docker push
이미지를 원격 리포지토리에 보관
snoopy_kr@Leeui-iMac ~ % docker login
Authenticating with existing credentials...
Login Succeeded
Logging in with your password grants your terminal complete access to your account.
For better security, log in with a limited-privilege personal access token. Learn more at https://docs.docker.com/go/access-tokens/
snoopy_kr@Leeui-iMac ~ % docker tag ubuntu:git welovefish/ubuntu:git
snoopy_kr@Leeui-iMac ~ % docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu git 99edbc97d61d 6 minutes ago 207MB
welovefish/ubuntu git 99edbc97d61d 6 minutes ago 207MB
ubuntu latest ba6acccedd29 7 weeks ago 72.8MB
snoopy_kr@Leeui-iMac ~ % docker push welovefish/ubuntu:git
The push refers to repository [docker.io/welovefish/ubuntu]
1b4231260725: Pushed
9f54eef41275: Mounted from library/ubuntu
git: digest: sha256:4c66d644effa1531f17dd0d5eb17d9f39306655fdc4f78c99fcf7100142de9c5 size: 741
welovefish는 github 계정이다. docker-desktop를 사용하면서 로그인이 되어 있다면 id, password는 입력하지 않아도 된다.
https://hub.docker.com/repositories 에서 보관된 도커 이미지를 확인할 수 있다.
docker rm
종료된 컨테이너 제거
snoopy_kr@Leeui-iMac ~ % docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3e98a3014884 ubuntu "bash" 40 minutes ago Up 24 minutes priceless_dijkstra
6d4fd22c3865 ubuntu "bash" 42 minutes ago Exited (0) 40 minutes ago focused_bardeen
snoopy_kr@Leeui-iMac ~ % docker rm 3e98a3014884
Error response from daemon: You cannot remove a running container 3e98a3014884c84509444285cf6791b907f75c771c35eb3d403850b57c805167. Stop the container before attempting removal or force remove
snoopy_kr@Leeui-iMac ~ % docker rm 6d4fd22c3865
6d4fd22c3865
종료가 되지 않은 컨테이너는 제거할 수 없다.
docker rmi
이미지를 로컬 리포지터리에서 삭제
snoopy_kr@Leeui-iMac ~ % docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu git 99edbc97d61d 21 minutes ago 207MB
welovefish/ubuntu git 99edbc97d61d 21 minutes ago 207MB
ubuntu latest ba6acccedd29 7 weeks ago 72.8MB
snoopy_kr@Leeui-iMac ~ % docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3e98a3014884 ubuntu "bash" 49 minutes ago Exited (0) About a minute ago priceless_dijkstra
snoopy_kr@Leeui-iMac ~ % docker rm 3e98a3014884
3e98a3014884
snoopy_kr@Leeui-iMac ~ % docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
snoopy_kr@Leeui-iMac ~ % docker rmi 99edbc97d61d
Error response from daemon: conflict: unable to delete 99edbc97d61d (must be forced) - image is referenced in multiple repositories
snoopy_kr@Leeui-iMac ~ % docker rmi ba6acccedd29
Error response from daemon: conflict: unable to delete ba6acccedd29 (cannot be forced) - image has dependent child images
snoopy_kr@Leeui-iMac ~ % docker rmi -f 99edbc97d61d
Untagged: ubuntu:git
Untagged: welovefish/ubuntu:git
Untagged: welovefish/ubuntu@sha256:4c66d644effa1531f17dd0d5eb17d9f39306655fdc4f78c99fcf7100142de9c5
Deleted: sha256:99edbc97d61da96ec2c6c4a5d30fe5dac0450eacabad0b6e8c33b27a3023d74d
Deleted: sha256:723e2fb2728119f027b9386c4e4c506e35d28ae73487e24580032b8b8c4ec4cc
snoopy_kr@Leeui-iMac ~ % docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu latest ba6acccedd29 7 weeks ago 72.8MB
이미지가 삭제되지 않은 이유는 리포지토리에서 참조되거나 의존적인 경우에는 삭제를 하지 못한다. 이 경우 -f를 사용해서 삭제가 가능하다.
docker inspect
도커 Object의 로우레벨 정보를 확인한다.
[ 1번 터미널 ]
snoopy_kr@Leeui-iMac ~ % docker run -it ubuntu bash
root@2aea93886f2c:/# apt update
// <생략>
root@2aea93886f2c:/# apt install -y iputils-ping net-tools
// <생략>
root@2aea93886f2c:/# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.17.0.2 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:ac:11:00:02 txqueuelen 0 (Ethernet)
RX packets 14319 bytes 21132406 (21.1 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 7699 bytes 422558 (422.5 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
loop txqueuelen 1000 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[ 2번 터미널 ]
snoopy_kr@Leeui-iMac ~ % docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2aea93886f2c ubuntu "bash" 4 minutes ago Up 4 minutes optimistic_dubinsky
snoopy_kr@Leeui-iMac ~ % docker inspect --format="" 2aea93886f2c
172.17.0.2
snoopy_kr@Leeui-iMac ~ % docker inspect --format="" 2aea93886f2c
02:42:ac:11:00:02
snoopy_kr@Leeui-iMac ~ % docker inspect --format="" 2aea93886f2c
/var/lib/docker/containers/2aea93886f2ce1be0b4e3b46e7fd0fe6a160314161745b17af11ac72d53df271/2aea93886f2ce1be0b4e3b46e7fd0fe6a160314161745b17af11ac72d53df271-json.log
snoopy_kr@Leeui-iMac ~ % docker inspect --format="" 2aea93886f2c
ubuntu
snoopy_kr@Leeui-iMac ~ % docker inspect --format=" -> " 2aea93886f2c
snoopy_kr@Leeui-iMac ~ % docker inspect --format="" 2aea93886f2c
snoopy_kr@Leeui-iMac ~ % docker inspect --format="" 2aea93886f2c
{"Hostname":"2aea93886f2c","Domainname":"","User":"","AttachStdin":true,"AttachStdout":true,"AttachStderr":true,"Tty":true,"OpenStdin":true,"StdinOnce":true,"Env":["PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":["bash"],"Image":"ubuntu","Volumes":null,"WorkingDir":"","Entrypoint":null,"OnBuild":null,"Labels":{}}
docker exec
실행 중인 컨테이너에 접속하기
[ 1번 터미널 ]
snoopy_kr@Leeui-iMac ~ % docker run -it ubuntu bash
root@2aea93886f2c:/# w
01:13:40 up 34 min, 0 users, load average: 0.00, 0.03, 0.06
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root@2aea93886f2c:/# ps
PID TTY TIME CMD
1 pts/0 00:00:00 bash
334 pts/0 00:00:00 ps
root@2aea93886f2c:/# tty
/dev/pts/0
root@2aea93886f2c:/# ps aw
PID TTY STAT TIME COMMAND
1 pts/0 Ss 0:00 bash
320 pts/1 Ss+ 0:00 bash
336 pts/0 R+ 0:00 ps aw
[ 2번 터미널 ]
snoopy_kr@Leeui-iMac ~ % docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2aea93886f2c ubuntu "bash" 19 minutes ago Up 19 minutes optimistic_dubinsky
snoopy_kr@Leeui-iMac ~ % docker exec -it 2aea93886f2c bash
root@2aea93886f2c:/# w
01:12:33 up 33 min, 0 users, load average: 0.00, 0.04, 0.07
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root@2aea93886f2c:/# ps
PID TTY TIME CMD
320 pts/1 00:00:00 bash
330 pts/1 00:00:00 ps
root@2aea93886f2c:/# tty
/dev/pts/1
root@2aea93886f2c:/# ps aw
PID TTY STAT TIME COMMAND
1 pts/0 Ss+ 0:00 bash
320 pts/1 Ss 0:00 bash
332 pts/1 R+ 0:00 ps aw
Dockerfile
| 커멘드 | 설명 |
|---|---|
| FROM <이미지>[:태그] | 컨테이너의 베이스 이미지를 지정 |
| RUN <커맨드> RUN ["커맨드", "파라미터1", "파라미터2"] |
FROM의 베이스 이미지에서 커맨드를 실행 |
| ADD <소스><컨테이너 내부="" 경로=""> ADD ["소스", ... "<컨테이너 내부="" 경로="">"] |
소스(파일, 디렉토리, tar 파일, URL)를 컨테이너 내부 경로에 복사 |
| COPY <소스><컨테이너 내부="" 경로=""> COPY ["소스", ... "<컨테이너 내부="" 경로="">"] |
소스(파일, 디렉토리)를 컨테이너 내부 경로에 복사 |
| ENTRYPOINT [“실행가능한 것”, “파라미터1”, “파라미터2”] ENTRYPOINT 커맨드 파라미터1 파라미터2(셀 형식) |
컨테이너가 실행하는 파일을 설정 |
| CMD [“실행 바이너리”, “파라미터1”, “파라미터2”] CMD <커맨드>(셀 형식) CMD [파라미터1", "파라미터2"](ENTRYPOINT의 파라미터) |
컨테이너 기동 시 실행될 커맨드를 지정 |
| ENV <키> <밸류> ENV <키>=<밸류> ... |
환경 변수 설정 |
| EXPOSE <포트> [<포트>...] | 공개 포트 설정 |
| USER <유저명> 또는 <유아이디> | RUN, CMD, ENTRYPOINT 실행 유저 지정 |
| VOLUME [“/path”] | 공유 가능한 불륨을 마운트 |
| WORKDIR /path | RUN, CMD, ENTRYPOINT, COPY, ADD의 작업 디렉토리 지정 |
| ARG <이름>[=<디폴트 값="">] | 빌드할 때 넘길 인자를 정의 –build-arg <변수명>=<값> |
| LABEL <키>=<밸류> <키>=<밸류> | 이미지의 메타데이터에 라벨을 추가 |
| MAINTAINER <이름> | 이미지의 메타데이터에 저작권을 추가 |
docker 내부 네트워크
[ 1번 터미널 ]
snoopy_kr@Leeui-iMac ~ % docker network ls
NETWORK ID NAME DRIVER SCOPE
9a5ddadbec91 bridge bridge local
6630cfb37ac9 host host local
e0f78c2f1ab0 none null local
snoopy_kr@Leeui-iMac ~ % docker network create my-network
1b1266d16d16406596c44c6b4d3fe0fe347d7d6b7bfa5b032bf11c945a63291d
snoopy_kr@Leeui-iMac ~ % docker network ls
NETWORK ID NAME DRIVER SCOPE
9a5ddadbec91 bridge bridge local
6630cfb37ac9 host host local
1b1266d16d16 my-network bridge local
e0f78c2f1ab0 none null local
snoopy_kr@Leeui-iMac ~ % docker run -d --name webserver1 --network my-network nginx:latest
7cdaee6a285a6a66e68f508d4d14e9e9fc342149a5c43b87b42c1cfdd4ab49e8
snoopy_kr@Leeui-iMac ~ % docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
7cdaee6a285a nginx:latest "/docker-entrypoint.…" About a minute ago Up About a minute 80/tcp webserver1
snoopy_kr@Leeui-iMac ~ % docker run -it --rm --name net-tool --network my-network ubuntu bash
root@d86aac5008d6:/# apt-get update
// <생략>
root@d86aac5008d6:/# apt-get install dnsutils
// <생략>
root@d86aac5008d6:/# nslookup webserver1
Server: 127.0.0.11
Address: 127.0.0.11#53
Non-authoritative answer:
Name: webserver1
Address: 172.18.0.2
root@d86aac5008d6:/# apt-get install -y curl
// <생략>
root@d86aac5008d6:/# curl http://webserver1
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
[ 2번 터미널 ]
snoopy_kr@Leeui-iMac ~ % docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
d86aac5008d6 ubuntu "bash" 8 minutes ago Up 8 minutes net-tool
7cdaee6a285a nginx:latest "/docker-entrypoint.…" 20 minutes ago Up 20 minutes 80/tcp webserver1
snoopy_kr@Leeui-iMac ~ % docker commit d86aac5008d6 ubuntu:network
sha256:0e9903d314af9165138ea4c8fb26264b3b97ee44827bc052083f7be59ec465c3
snoopy_kr@Leeui-iMac ~ % docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu network 0e9903d314af 7 seconds ago 164MB
nginx latest f652ca386ed1 4 days ago 141MB
ubuntu latest ba6acccedd29 7 weeks ago 72.8MB
[ 1번 터미널 ]
root@d86aac5008d6:/# exit
exit
snoopy_kr@Leeui-iMac ~ % docker run -it --rm --name net-tool --network bridge ubuntu:network bash
root@9ba6033c78b8:/# nslookup webserver1
;; connection timed out; no servers could be reached
root@9ba6033c78b8:/# nslookup 172.18.0.2
** server can't find 2.0.18.172.in-addr.arpa: NXDOMAIN
root@9ba6033c78b8:/# curl http://172.18.0.2
curl: (28) Failed to connect to 172.18.0.2 port 80: Connection timed out
docker 포트 외부 노출
snoopy_kr@Leeui-iMac ~ % docker run -d --name webserver1 -p 8080:80 nginx:latest
9fe2c3187e932c1de08dfc2a31c553f846b52c110bfc1c1372a98d7b9e09ce09
snoopy_kr@Leeui-iMac ~ % curl http://localhost:8080
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
snoopy_kr@Leeui-iMac ~ % curl http://192.168.60.18:8080
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
| 커멘드 | 설명 |
|---|---|
| docker network ls | 컨테이너 네트워크를 리스트로 표시 |
| docker network inspect | 네트워크명을 지정해서 자세한 내용을 표시 |
| docker network create | 컨테이너 네트워크를 생성 |
| docker network rm | 컨테이너 네트워크를 삭제 |
| docker network connect | 컨테이너를 컨테이너 네트워크에 접속 |
| docker network disconnect | 컨테이너를 컨테이너 네트워크에서 분리 |
컨테이너 네트워크를 연결 및 외부 포트 노출
[ php/index.php ]
<html>
<head><title>PHP CONNECTION TEST</title></head>
<body>
<?php
$servername = "mysql";
$database = "mysql";
$username = getenv('MYSQL_USER');
$password = getenv('MYSQL_PASSWORD');
try {
$dsn = "mysql:host=$servername;dbname=$database";
$conn = new PDO($dsn, $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
print("<p>접속에 성공했습니다.</p>");
} catch(PDOException $e) {
print("<p>접속에 실패했습니다.</p>");
echo $e->getMessage();
}
$conn = null;
print('<p>종료합니다.</p>');
?>
</body>
</html>
[ Dockerfile ]
FROM php:7.0-apache
RUN apt-get update && apt-get install -y \
&& apt-get install -y libmcrypt-dev mysql-client \
&& apt-get install -y zip unzip git vim
RUN docker-php-ext-install pdo_mysql session json mbstring
COPY php/ /var/www/html/
snoopy_kr@Leeui-iMac ~ % docker network create api-net
11a23b84869a971a4a18ff95aa2327e1de5e889270effafda5850f075a8191f1
snoopy_kr@Leeui-iMac ~ % docker run -d --name mysql --network api-net -e MYSQL_ROOT_PASSWORD=qwerty mysql:5.7
08f26dc3354a4e4df6d5eded9d29f184ae9a1fb1c1b75a47ab436084ea97db85
snoopy_kr@Leeui-iMac ~ % docker build -t php-api:0.1 .
// <생략>
snoopy_kr@Leeui-iMac ~ % docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
php-api 0.1 9c06dcde6bcd 56 seconds ago 574MB
mysql 5.7 738e7101490b 4 days ago 448MB
snoopy_kr@Leeui-iMac ~ % docker run -d --name php --network api-net -p 8080:80 -e MYSQL_USER=root -e MYSQL_PASSWORD=qwerty php-api:0.1
ee64e71baf41a3681b484c23bb457742e15202489e9e50466d7122f38bf227c3
snoopy_kr@Leeui-iMac ~ % curl http://localhost:8080/
<html>
<head><title>PHP CONNECTION TEST</title></head>
<body>
<p>접속에 성공했습니다.</p><p>종료합니다.</p></body>
</html>
snoopy_kr@Leeui-iMac ~ % docker logs php
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.19.0.3. Set the 'ServerName' directive globally to suppress this message
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.19.0.3. Set the 'ServerName' directive globally to suppress this message
[Tue Dec 07 08:02:46.091982 2021] [mpm_prefork:notice] [pid 1] AH00163: Apache/2.4.25 (Debian) PHP/7.0.33 configured -- resuming normal operations
[Tue Dec 07 08:02:46.092035 2021] [core:notice] [pid 1] AH00094: Command line: 'apache2 -D FOREGROUND'
172.19.0.1 - - [07/Dec/2021:08:03:09 +0000] "GET / HTTP/1.1" 200 412 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36"
172.19.0.1 - - [07/Dec/2021:08:04:01 +0000] "-" 408 0 "-" "-"
172.19.0.1 - - [07/Dec/2021:08:04:26 +0000] "-" 408 0 "-" "-"
환경 변수 API #1
[ Dockerfile ]
FROM alpine:latest
RUN apk update && apk add bash
ADD ./my_daemon /my_daemon
CMD ["/bin/bash", "/my_daemon"]
[ my_daemon ]
# 카운터 초기화
COUNT=0
# 환경변수가 없으면 설정
if [ -z "$INTERVAL" ]; then
INTERVAL=3
fi
# 메인 루프
while [ ture ];
do
TM=`date|awk '{print $4}'`
printf "%s : %s \n" $TM $COUNT
let COUNT=COUNT+1
sleep $INTERVAL
done
snoopy_kr@Leeui-iMac ~ % docker build --tag my_daemon:0.1 .
// <생략>
snoopy_kr@Leeui-iMac ~ % docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
my_daemon 0.1 70291626f678 20 seconds ago 10MB
snoopy_kr@Leeui-iMac ~ % docker run --name myd my_daemon:0.1
08:46:42 : 0
08:46:45 : 1
08:46:48 : 2
08:46:51 : 3 # <- docker stop myd
08:46:54 : 4
08:46:57 : 5
08:47:00 : 6
snoopy_kr@Leeui-iMac ~ % docker start -i myd
08:49:42 : 0
08:49:45 : 1
08:49:48 : 2
08:49:51 : 3 # <- docker stop myd
08:49:54 : 4
08:49:57 : 5
08:50:00 : 6
환경 변수 API #2
[ my_daemon2 ] 개선 버전
# 카운터 초기화
COUNT=0
# 환경변수가 없으면 설정
if [ -z "$INTERVAL" ]; then
INTERVAL=3
fi
# 기동시 상태 취득
if [ -f save.dat ]; then
COUNT=`cat save.dat`
rm -f save.dat
fi
# SIGTERM 시그널 처리
save() {
echo $COUNT > save.dat
exit
}
trap save TERM
# 메인 루프
while [ ture ];
do
TM=`date|awk '{print $4}'`
printf "%s : %s \n" $TM $COUNT
let COUNT=COUNT+1
sleep $INTERVAL
done
[ Dockerfile2 ]
FROM alpine:latest
RUN apk update && apk add bash
ADD ./my_daemon2 /my_daemon
CMD ["/bin/bash", "/my_daemon"]
snoopy_kr@Leeui-iMac ~ % docker build --tag my_daemon:0.2 -f Dockerfile2 .
// <생략>
snoopy_kr@Leeui-iMac ~ % docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
my_daemon 0.1 70291626f678 20 seconds ago 10MB
my_daemon 0.2 c8143e9795e1 11 seconds ago 10MB
snoopy_kr@Leeui-iMac ~ % docker run --name myd my_daemon:0.2
09:00:32 : 0
09:00:35 : 1
09:00:38 : 2 # <- docker stop myd
snoopy_kr@Leeui-iMac ~ % docker start -i myd
09:01:11 : 3
09:01:14 : 4
09:01:17 : 5 # <- docker stop myd
환경 변수 API #3
[ my_daemon3 ] 개선 버전
# 카운터 초기화
COUNT=0
# 퍼시스턴트 볼륨
PV=/pv/save.dat
# 환경변수가 없으면 설정
if [ -z "$INTERVAL" ]; then
INTERVAL=3
fi
# 기동 시 상태 취득
if [ -f $PV ]; then
COUNT=`cat $PV`
rm -f $PV
fi
# SIGTERM 시그널 처리
save() {
echo $COUNT > $PV
exit
}
trap save TERM
# 메인 루프
while [ ture ];
do
TM=`date|awk '{print $4}'`
printf "%s : %s \n" $TM $COUNT
let COUNT=COUNT+1
sleep $INTERVAL
done
[ Dockerfile3 ]
FROM alpine:latest
RUN apk update && apk add bash
ADD ./my_daemon3 /my_daemon
CMD ["/bin/bash", "/my_daemon"]
snoopy_kr@Leeui-iMac ~ % docker build --tag my_daemon:0.3 -f Dockerfile3 .
// <생략>
snoopy_kr@Leeui-iMac ~ % docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
my_daemon 0.1 70291626f678 20 seconds ago 10MB
my_daemon 0.2 c8143e9795e1 11 seconds ago 10MB
my_daemon 0.3 03f7acaebf77 1 second ago 10MB
snoopy_kr@Leeui-iMac ~ % docker run --name myd -v `pwd`/data:/pv my_daemon:0.3
09:00:32 : 0
09:00:35 : 1
09:00:38 : 2 # <- docker stop myd
snoopy_kr@Leeui-iMac ~ % docker start -i myd
09:01:11 : 3
09:01:14 : 4
09:01:17 : 5 # <- docker stop myd
snoopy_kr@Leeui-iMac ~ % docker rm myd
snoopy_kr@Leeui-iMac ~ % docker run --name myd -v `pwd`/data:/pv my_daemon:0.3
09:01:53 : 6
09:01:56 : 7
09:01:59 : 8 # <- docker stop myd
snoopy_kr@Leeui-iMac ~ % docker run -d --name myd -v `pwd`/data:/pv my_daemon:0.3
9ab72b5dc5f1433f39d654c0cc5af736c7c87ee0b14dd9ac6b9d5c04530ed614
snoopy_kr@Leeui-iMac ~ % docker logs myd
09:31:51 : 14
09:31:54 : 15
09:31:57 : 16
09:32:00 : 17
09:32:03 : 18
snoopy_kr@Leeui-iMac ~ % docker attach --sig-proxy=false myd
09:32:33 : 28
09:32:36 : 29
09:32:39 : 30
09:32:42 : 31
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