Dockerfile からの Docker イメージ作成

想定

Apache HTTP Server をインストール

Dockerfile 作成

code:Dockerfile

FROM centos

RUN yum -y update

RUN yum -y install httpd

RUN コマンド 1 つにつき 1 つのファイルシステム層が作られる

build

code:shell

$ docker build -t centos-apache-httpd .

check images

code:shell

$ docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

centos-apache-httpd latest 71232abd0711 5 seconds ago 434MB

(snip)

動作確認

code:shell

$ docker run centos-apache-httpd httpd -V

AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message

Server version: Apache/2.4.6 (CentOS)

Server built: Jun 27 2018 13:48:59

Server's Module Magic Number: 20120211:24

Server loaded: APR 1.4.8, APR-UTIL 1.5.2

Compiled using: APR 1.4.8, APR-UTIL 1.5.2

Architecture: 64-bit

Server MPM: prefork

threaded: no

forked: yes (variable process count)

Server compiled with....

-D APR_HAS_SENDFILE

-D APR_HAS_MMAP

-D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)

-D APR_USE_SYSVSEM_SERIALIZE

-D APR_USE_PTHREAD_SERIALIZE

-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT

-D APR_HAS_OTHER_CHILD

-D AP_HAVE_RELIABLE_PIPED_LOGS

-D DYNAMIC_MODULE_LIMIT=256

-D HTTPD_ROOT="/etc/httpd"

-D SUEXEC_BIN="/usr/sbin/suexec"

-D DEFAULT_PIDLOG="/run/httpd/httpd.pid"

-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"

-D DEFAULT_ERRORLOG="logs/error_log"

-D AP_TYPES_CONFIG_FILE="conf/mime.types"

-D SERVER_CONFIG_FILE="conf/httpd.conf"