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開発環境でのメール確認用にMailHogを利用する(Docker利用)

Last updated at Posted at 2020-10-13

開発環境でメールの確認方法が面倒だったり、配信先に気を使う場合がありますが、MailHogというツールを使うとローカル内に閉じたメールの確認ができる環境を簡単に立ち上げることができます。

MailHogはGo言語でできているらしいです。

以前はMailCatcherという別の類似ツールを利用していましたが、MailHogの方が構築が容易だったので乗り換えました。

docker-composeで以下の構成で立ち上げます。

ファイル構成
.
├── docker-compose.yml
└── php
    ├── docker
    │   ├── Dockerfile
    │   └── php.ini
    └── mail_test.php
docker-compose.yml

8025番ポートでwebインターフェースを利用するのでポートを設定します

version: '3'
services:
 php:
  build:
   context: ./
   dockerfile: php/docker/Dockerfile
  volumes:
   - ./php/:/var/www/html/
 mailhog:
  image: mailhog/mailhog
  ports:
   - "8025:8025" #webインターフェース用ポート
Dockerfile

phpからのメール送信にmhsendmailが必要なので、Dockerfileでインストールします。


FROM php:5.6-apache
WORKDIR /var/www/html
RUN curl -sSL https://github.com/mailhog/mhsendmail/releases/download/v0.2.0/mhsendmail_linux_amd64 -o mhsendmail \
    && chmod +x mhsendmail \
    && mv mhsendmail /usr/local/bin/mhsendmail
COPY ./php/docker/php.ini /usr/local/etc/php/
php.ini

[mail function]を書き換えておきます。

[mail function]
; For Unix only.  You may supply arguments as well (default: "sendmail -t -i").
; http://php.net/sendmail-path
; sendmail_path = /usr/sbin/sendmail -t -i
; 以下に書き換え
sendmail_path = "/usr/local/bin/mhsendmail --smtp-addr=mailhog:1025"
mail_test.php
<?php

$to      = "hoge@localhost.local";
$subject = "TEST";
$message = "メールテスト";
$headers = "From: from@example.com";

mb_send_mail($to, $subject, $message, $headers);
docker-compose で up
$ docker-compose up -d
Building php
Step 1/4 : FROM php:5.6-apache
 ---> 24c791995c1e
Step 2/4 : WORKDIR /var/www/html
 ---> Using cache
 ---> 1294d05c5c03
Step 3/4 : RUN curl -sSL https://github.com/mailhog/mhsendmail/releases/download/v0.2.0/mhsendmail_linux_amd64 -o mhsendmail     && chmod +x mhsendmail     && mv mhsendmail /usr/local/bin/mhsendmail
 ---> Using cache
 ---> db0719944c4e
Step 4/4 : COPY ./php/docker/php.ini /usr/local/etc/php/
 ---> 264eb166413a
Successfully built 264eb166413a
Successfully tagged mailhog_php:latest
WARNING: Image for service php was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
Pulling mailhog (mailhog/mailhog:)...
latest: Pulling from mailhog/mailhog
df20fa9351a1: Already exists
ed8968b2872e: Pull complete
a92cc7c5fd73: Pull complete
f17c8f1adafb: Pull complete
03954754c53a: Pull complete
60493946972a: Pull complete
368ee3bc1dbb: Pull complete
Digest: sha256:8d76a3d4ffa32a3661311944007a415332c4bb855657f4f6c57996405c009bea
Status: Downloaded newer image for mailhog/mailhog:latest
Creating mailhog_php_1     ... done
Creating mailhog_mailhog_1 ... done
mailhogのWEBインターフェース

localhost:8025で表示
image.png

phpのコンテナ内からメール送信スクリプトを実行
$ docker exec -it mailhog_php_1 /bin/bash
root@9c4b6a5df613:/var/www/html# php mail_test.php

windows上にメールの到着を通知が表示され
image.png
メールが到着していることが確認できます
image.png
image.png

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