我曾尝试在 dockerfile 中实现 postfix，但当我尝试发送邮件时失败，提示“地址解析失败”。我需要重新配置 docker 网络还是仅重新配置 postfix 主配置？
发送电子邮件：
sendmail [email protected]
From: [email protected]
Subject: theSubject
This is the message
.
输出错误：
postfix/error[573]: 322CC760259: to=<NEXTRCPT NOT UPDATED>, orig_to=<[email protected]>, relay=none, delay=15, delays=15/0/0/0.1, dsn=4.3.0, status=deferred (address resolver failure)
postfix 主配置（main.cf）
# See /usr/share/postfix/main.cf.dist for a commented, more complete version
# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no
# appending .domain is the MUA's job.
append_dot_mydomain = no
# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h
readme_directory = no
# See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on
# fresh installs.
compatibility_level = 2
# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = meron
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination = $myhostname, meron, localhost.localdomain, , localhost
relayhost = [smtp.gmail.com]:587
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
# Enable SASL authentication
smtp_sasl_auth_enable = yes
# Disallow methods that allow anonymous authentication
smtp_sasl_security_options = noanonymous
# Location of sasl_passwd
smtp_sasl_password_maps = hash:/etc/postfix/sasl/sasl_passd
# Enable STARTTLS encryption
smtp_tls_security_level = encrypt
# Location of CA certificates
smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
Dockerfile：
FROM ubuntu:16.04
RUN apt-get update && apt-get install -y libsasl2-modules postfix && apt-get -y install rsyslog; \
rm -rf /var/lib/apt/lists/*;
CMD touch /dev/xconsole && chgrp syslog /dev/xconsole && chmod 664 /dev/xconsole
# RUN service rsyslog restart
RUN echo "[smtp.gmail.com]:587 [email protected]:password" > /etc/postfix/sasl_passwd
RUN postmap /etc/postfix/sasl_passwd
RUN sed -i '/relayhost*/c\relayhost = [smtp.gmail.com]:587' /etc/postfix/main.cf
RUN sed -i '/smtp_sasl_auth_enable*/c\smtp_sasl_auth_enable = yes' /etc/postfix/main.cf
RUN sed -i '/smtp_sasl_security_options*/c\smtp_sasl_security_options = noanonymous' /etc/postfix/main.cf
RUN sed -i '/smtp_sasl_password_maps*/c\smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd' /etc/postfix/main.cf
RUN sed -i '/smtp_tls_security_level*/c\smtp_tls_security_level = encrypt' /etc/postfix/main.cf
RUN sed -i '/smtp_tls_CAfile*/c\smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt' /etc/postfix/main.cf
# CMD /etc/init.d/postfix restart && tail -f /var/log/syslog
EXPOSE 25
# CMD service rsyslog start && service postfix start && tail -f /var/log/mail.log
CMD touch /dev/xconsole && chgrp syslog /dev/xconsole && chmod 664 /dev/xconsole && service rsyslog start && service postfix start && tail -f /var/log/mail.log
任何帮助将不胜感激。
答案1
您可以将容器从 docker bridge 网络中移除，而是通过添加--network="host"选项来使用主机的网络，docker run .....而不是使用参数映射端口-p。
对于 docker-compose，您可以添加&network_mode: "host"来代替该特定服务。ports:networks:
例如，当我在本地/开发环境中运行 PHP 容器时。
Docker 命令行
docker run --rm --network="host" -v $(pwd):/app MyVendor/phpfpm71 my_command
Docker 组成：
phpfpm71:
image: MyVendor/phpfpm71
volumes:
- ./app:/app
network_mode: "host"
答案2
我已将网关 IP 地址添加到 main.cf 中的 mydestination 配置中。
工作得很好。;)