はじめに
KubernetesのオンプレミスPod公開で使用している、DockerImageを作成する手順の記録します。
該当の記事は以下
https://qiita.com/sugimount/items/d7f884ad08d761714556
DockerHubで公開されている Official の Nginx イメージ (alpine base) を、改変します。
Nginxアプリケーション自体が80ポートを公開しているので、何でも良いのですが29499ポートで公開するように変更します。
DockerHubでRepository作成
以下作業を実施
- アカウント作成
- Repository作成 (name : node-healthcheck)
Imageを作成
作業ディレクトリ作成
mkdir ~/myimages
cd ~/myimages
nginx:1.15.2 をBaseImageにして、公開Portを変更する、DockerFileを作成します
cat <<'EOF' > ~/myimages/Dockerfile
FROM nginx:1.15.2
MAINTAINER sugimount <https://twitter.com/sugimount>
COPY default.conf /etc/nginx/conf.d/default.conf
EXPOSE 29499
EOF
nginx のdefault port を変更するためのファイルを作成します
cat <<'EOF' > ~/myimages/default.conf
server {
#listen 80;
listen 29499;
server_name localhost;
#charset koi8-r;
#access_log /var/log/nginx/host.access.log main;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
EOF
DockerFileから作成する
cd /root/myimages
docker build --tag=sugimount/node-healthcheck:0.0.1 .
実行例
[root@calico-k8s-master01 myimages(demo1 kubernetes-admin)]# docker build --tag=sugimount/node-healthcheck:0.0.1 .
Sending build context to Docker daemon 4.096 kB
Step 1/4 : FROM nginx:1.15.2
---> c82521676580
Step 2/4 : MAINTAINER sugimount <https://twitter.com/sugimount>
---> Running in dda66ff3ba3c
---> a7d06c6496cf
Removing intermediate container dda66ff3ba3c
Step 3/4 : COPY default.conf /etc/nginx/conf.d/default.conf
---> 2b87925388e7
Removing intermediate container 1bac74b639d6
Step 4/4 : EXPOSE 29499
---> Running in 26df4bee5eb7
---> 6fa95df8a395
Removing intermediate container 26df4bee5eb7
Successfully built 6fa95df8a395
確認
[root@calico-k8s-master01 myimages(demo1 kubernetes-admin)]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
sugimount/node-healthcheck 0.0.1 6fa95df8a395 14 seconds ago 109 MB
docker.io/nginx 1.15.2 c82521676580 4 days ago 109 MB
DockerRunでコンテナ起動
以下コマンドで、ローカルのイメージから起動します
docker run -p 29499:29499 --rm -it sugimount/node-healthcheck:0.0.1 /bin/bash
ファイルを確認します
root@a27fb176d34f:/etc/nginx/conf.d# cat /etc/nginx/conf.d/default.conf
server {
#listen 80;
listen 29499;
server_name localhost;
#charset koi8-r;
#access_log /var/log/nginx/host.access.log main;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
コンテナ内部でNginxを起動します
nginx
Host側からCurlでアクセスします
[root@calico-k8s-master01 ~(demo1 kubernetes-admin)]# curl http://localhost:29499
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
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>
コンテナ内部から抜けます
exit
DockerHub へ Push
DockerHub へ Login
# docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: sugimount
Password:
Login Succeeded
作成したImageをPushします
docker push sugimount/node-healthcheck:0.0.1
参考URL
Nginx Image
DockerFile
DockerHub Push