我正在尝试为后缀3.3建立一个容器。容器可以正常构建和运行，但是我无法连接到它。
Dockerfile：
#Postfix 3.3 container
#This container uses a version of postfix considered not yet ready for production
#by the package provider. Use at your own risk.
FROM centos:7
LABEL maintainer="Chad Cordero (ccordero@csusb.edu)"
#Add Ghettoforge repo
RUN curl -o /tmp/gf-release-latest.gf.el7.noarch.rpm http://mirror.ghettoforge.org/distributions/gf/gf-release-latest.gf.el7.noarch.rpm
RUN rpm -i /tmp/gf-release-latest.gf.el7.noarch.rpm
#Remove postfix2
RUN yum remove -y postfix
# Install postfix opendkim saslauthd
RUN yum install -y --enablerepo=gf-testing postfix3
# Latest updates
RUN yum update -y
# Clean up
RUN yum clean all
#Required by postfix start-fg
RUN postconf inet_protocols="ipv4"
# Expose smtp and submission
EXPOSE 25
CMD ["postfix","start-fg"]
构建容器不会出错。
$ docker build . -t chadcordero/postfix3
Sending build context to Docker daemon 241.2kB Step 1/11 : FROM centos:7 ---> 5182e96772bf Step 2/11 : LABEL maintainer="Chad Cordero (ccordero@csusb.edu)" ---> Running in 4abce1f5e3b5 Removing intermediate container 4abce1f5e3b5 ---> eea11df8266e Step 3/11 : RUN curl -o /tmp/gf-release-latest.gf.el7.noarch.rpm http://mirror.ghettoforge.org/distributions/gf/gf-release-latest.gf.el7.noarch.rpm
---> Running in 1a502135c839 % Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed 100 8036 100 8036 0 0 78999 0 --:--:-- --:--:--
--:--:-- 79564 Removing intermediate container 1a502135c839 ---> c6515d1f6e7d Step 4/11 : RUN rpm -i /tmp/gf-release-latest.gf.el7.noarch.rpm ---> Running in d3daa3f25493 warning: /tmp/gf-release-latest.gf.el7.noarch.rpm: Header V4 RSA/SHA1 Signature, key ID da8b7718: NOKEY Removing intermediate container d3daa3f25493 ---> c20b7895b85b Step 5/11 : RUN yum remove -y postfix
---> Running in 36188dd28049 Loaded plugins: fastestmirror, ovl No Match for argument: postfix No Packages marked for removal Removing intermediate container 36188dd28049 ---> ba0d8c6eb5e4 Step 6/11 : RUN yum install -y --enablerepo=gf-testing postfix3 ---> Running in 7adddaac9d74 Loaded plugins: fastestmirror, ovl Determining fastest mirrors * base: mirror.scalabledns.com * extras: mirror.scalabledns.com * updates: mirror.scalabledns.com Resolving Dependencies
--> Running transaction check
---> Package postfix3.x86_64 2:3.3.1-1.gf.el7 will be installed
--> Processing Dependency: /sbin/service for package: 2:postfix3-3.3.1-1.gf.el7.x86_64
--> Processing Dependency: libicuuc.so.50()(64bit) for package: 2:postfix3-3.3.1-1.gf.el7.x86_64
--> Processing Dependency: libicui18n.so.50()(64bit) for package: 2:postfix3-3.3.1-1.gf.el7.x86_64
--> Processing Dependency: libicudata.so.50()(64bit) for package: 2:postfix3-3.3.1-1.gf.el7.x86_64
--> Running transaction check
---> Package initscripts.x86_64 0:9.49.41-1.el7_5.2 will be installed
--> Processing Dependency: sysvinit-tools >= 2.87-5 for package: initscripts-9.49.41-1.el7_5.2.x86_64
--> Processing Dependency: iproute for package: initscripts-9.49.41-1.el7_5.2.x86_64
---> Package libicu.x86_64 0:50.1.2-15.el7 will be installed
--> Running transaction check
---> Package iproute.x86_64 0:4.11.0-14.el7 will be installed
--> Processing Dependency: libmnl.so.0(LIBMNL_1.0)(64bit) for package: iproute-4.11.0-14.el7.x86_64
--> Processing Dependency: libxtables.so.10()(64bit) for package: iproute-4.11.0-14.el7.x86_64
--> Processing Dependency: libmnl.so.0()(64bit) for package: iproute-4.11.0-14.el7.x86_64
---> Package sysvinit-tools.x86_64 0:2.88-14.dsf.el7 will be installed
--> Running transaction check
---> Package iptables.x86_64 0:1.4.21-24.1.el7_5 will be installed
--> Processing Dependency: libnfnetlink.so.0()(64bit) for package: iptables-1.4.21-24.1.el7_5.x86_64
--> Processing Dependency: libnetfilter_conntrack.so.3()(64bit) for package: iptables-1.4.21-24.1.el7_5.x86_64
---> Package libmnl.x86_64 0:1.0.3-7.el7 will be installed
--> Running transaction check
---> Package libnetfilter_conntrack.x86_64 0:1.0.6-1.el7_3 will be installed
---> Package libnfnetlink.x86_64 0:1.0.1-4.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================ Package Arch Version Repository Size
================================================================================ Installing: postfix3 x86_64 2:3.3.1-1.gf.el7 gf-testing 3.0 M Installing for dependencies: initscripts x86_64 9.49.41-1.el7_5.2 updates 437 k iproute x86_64 4.11.0-14.el7 base 763 k iptables x86_64 1.4.21-24.1.el7_5 updates 432 k libicu x86_64 50.1.2-15.el7 base 6.9 M libmnl x86_64 1.0.3-7.el7 base 23 k libnetfilter_conntrack x86_64 1.0.6-1.el7_3 base 55 k libnfnetlink x86_64 1.0.1-4.el7 base 26 k sysvinit-tools x86_64 2.88-14.dsf.el7 base 63 k
Transaction Summary
================================================================================ Install 1 Package (+8 Dependent packages)
Total download size: 12 M Installed size: 39 M Downloading packages: warning: /var/cache/yum/x86_64/7/updates/packages/initscripts-9.49.41-1.el7_5.2.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY Public key for initscripts-9.49.41-1.el7_5.2.x86_64.rpm is not installed Public key for libmnl-1.0.3-7.el7.x86_64.rpm is not installed warning: /var/cache/yum/x86_64/7/gf-testing/packages/postfix3-3.3.1-1.gf.el7.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID da8b7718: NOKEY Public key for postfix3-3.3.1-1.gf.el7.x86_64.rpm is not installed
-------------------------------------------------------------------------------- Total 13 MB/s | 12 MB 00:00 Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 Importing GPG key 0xF4A80EB5: Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>" Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5 Package : centos-release-7-5.1804.1.el7.centos.x86_64 (@Updates) From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-gf.el7 Importing GPG key 0xDA8B7718: Userid : "Ghettoforge (el7) <gf@ghettoforge.org>" Fingerprint: b43e a892 86f4 b6fd ff83 fed1 d005 ae31 da8b 7718 Package : gf-release-7-10.gf.el7.noarch (installed) From : /etc/pki/rpm-gpg/RPM-GPG-KEY-gf.el7 Running transaction check Running transaction test Transaction test succeeded Running transaction Warning: RPMDB altered outside of yum. Installing : libmnl-1.0.3-7.el7.x86_64 1/9 Installing : libnfnetlink-1.0.1-4.el7.x86_64 2/9 Installing : libnetfilter_conntrack-1.0.6-1.el7_3.x86_64 3/9 Installing : iptables-1.4.21-24.1.el7_5.x86_64 4/9 Installing : iproute-4.11.0-14.el7.x86_64 5/9 Installing : sysvinit-tools-2.88-14.dsf.el7.x86_64 6/9 Installing : initscripts-9.49.41-1.el7_5.2.x86_64 7/9 Installing : libicu-50.1.2-15.el7.x86_64 8/9 Installing : 2:postfix3-3.3.1-1.gf.el7.x86_64 9/9 Verifying : libnfnetlink-1.0.1-4.el7.x86_64 1/9 Verifying : libmnl-1.0.3-7.el7.x86_64 2/9 Verifying : initscripts-9.49.41-1.el7_5.2.x86_64 3/9 Verifying : libicu-50.1.2-15.el7.x86_64 4/9 Verifying : iptables-1.4.21-24.1.el7_5.x86_64 5/9 Verifying : 2:postfix3-3.3.1-1.gf.el7.x86_64 6/9 Verifying : sysvinit-tools-2.88-14.dsf.el7.x86_64 7/9 Verifying : iproute-4.11.0-14.el7.x86_64 8/9 Verifying : libnetfilter_conntrack-1.0.6-1.el7_3.x86_64 9/9
Installed: postfix3.x86_64 2:3.3.1-1.gf.el7
Dependency Installed: initscripts.x86_64 0:9.49.41-1.el7_5.2 iproute.x86_64 0:4.11.0-14.el7 iptables.x86_64 0:1.4.21-24.1.el7_5 libicu.x86_64 0:50.1.2-15.el7 libmnl.x86_64 0:1.0.3-7.el7 libnetfilter_conntrack.x86_64 0:1.0.6-1.el7_3 libnfnetlink.x86_64 0:1.0.1-4.el7 sysvinit-tools.x86_64 0:2.88-14.dsf.el7
Complete! Removing intermediate container 7adddaac9d74 ---> 51f250cd5ba2 Step 7/11 : RUN yum update -y ---> Running in 1741f6cdec56 Loaded plugins: fastestmirror, ovl Loading mirror speeds from cached hostfile * base: mirror.scalabledns.com * extras: mirror.scalabledns.com * updates: mirror.scalabledns.com Resolving Dependencies
--> Running transaction check
---> Package audit-libs.x86_64 0:2.8.1-3.el7 will be updated
---> Package audit-libs.x86_64 0:2.8.1-3.el7_5.1 will be an update
---> Package bind-license.noarch 32:9.9.4-61.el7 will be updated
---> Package bind-license.noarch 32:9.9.4-61.el7_5.1 will be an update
---> Package centos-release.x86_64 0:7-5.1804.1.el7.centos will be updated
---> Package centos-release.x86_64 0:7-5.1804.4.el7.centos will be an update
---> Package dracut.x86_64 0:033-535.el7 will be updated
---> Package dracut.x86_64 0:033-535.el7_5.1 will be an update
---> Package kpartx.x86_64 0:0.4.9-119.el7 will be updated
---> Package kpartx.x86_64 0:0.4.9-119.el7_5.1 will be an update
---> Package libblkid.x86_64 0:2.23.2-52.el7 will be updated
---> Package libblkid.x86_64 0:2.23.2-52.el7_5.1 will be an update
---> Package libmount.x86_64 0:2.23.2-52.el7 will be updated
---> Package libmount.x86_64 0:2.23.2-52.el7_5.1 will be an update
---> Package libuuid.x86_64 0:2.23.2-52.el7 will be updated
---> Package libuuid.x86_64 0:2.23.2-52.el7_5.1 will be an update
---> Package nss.x86_64 0:3.36.0-5.el7_5 will be updated
---> Package nss.x86_64 0:3.36.0-7.el7_5 will be an update
---> Package nss-sysinit.x86_64 0:3.36.0-5.el7_5 will be updated
---> Package nss-sysinit.x86_64 0:3.36.0-7.el7_5 will be an update
---> Package nss-tools.x86_64 0:3.36.0-5.el7_5 will be updated
---> Package nss-tools.x86_64 0:3.36.0-7.el7_5 will be an update
---> Package systemd.x86_64 0:219-57.el7 will be updated
---> Package systemd.x86_64 0:219-57.el7_5.3 will be an update
---> Package systemd-libs.x86_64 0:219-57.el7 will be updated
---> Package systemd-libs.x86_64 0:219-57.el7_5.3 will be an update
---> Package util-linux.x86_64 0:2.23.2-52.el7 will be updated
---> Package util-linux.x86_64 0:2.23.2-52.el7_5.1 will be an update
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================ Package Arch Version Repository Size
================================================================================ Updating: audit-libs x86_64 2.8.1-3.el7_5.1 updates 99 k bind-license noarch 32:9.9.4-61.el7_5.1 updates 85 k centos-release x86_64 7-5.1804.4.el7.centos updates 25 k dracut x86_64 033-535.el7_5.1 updates 325 k kpartx x86_64 0.4.9-119.el7_5.1 updates 76 k libblkid x86_64 2.23.2-52.el7_5.1 updates 178 k libmount x86_64 2.23.2-52.el7_5.1 updates 180 k libuuid x86_64 2.23.2-52.el7_5.1 updates 81 k nss x86_64 3.36.0-7.el7_5 updates 835 k nss-sysinit x86_64 3.36.0-7.el7_5 updates 62 k nss-tools x86_64 3.36.0-7.el7_5 updates 515 k systemd x86_64 219-57.el7_5.3 updates 5.0 M systemd-libs x86_64 219-57.el7_5.3 updates 402 k util-linux x86_64 2.23.2-52.el7_5.1 updates 2.0 M
Transaction Summary
================================================================================ Upgrade 14 Packages
Total download size: 9.8 M Downloading packages: Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
-------------------------------------------------------------------------------- Total 19 MB/s | 9.8 MB 00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Updating : libuuid-2.23.2-52.el7_5.1.x86_64 1/28 Updating : libblkid-2.23.2-52.el7_5.1.x86_64 2/28 Updating : libmount-2.23.2-52.el7_5.1.x86_64 3/28 Updating : nss-sysinit-3.36.0-7.el7_5.x86_64 4/28 Updating : nss-3.36.0-7.el7_5.x86_64 5/28 Updating : systemd-libs-219-57.el7_5.3.x86_64 6/28 Updating : audit-libs-2.8.1-3.el7_5.1.x86_64 7/28 Updating : util-linux-2.23.2-52.el7_5.1.x86_64 8/28 Updating : centos-release-7-5.1804.4.el7.centos.x86_64 9/28 Updating : systemd-219-57.el7_5.3.x86_64 10/28 Failed to get D-Bus connection: Operation not permitted Updating : kpartx-0.4.9-119.el7_5.1.x86_64 11/28 Updating : dracut-033-535.el7_5.1.x86_64 12/28 Updating : nss-tools-3.36.0-7.el7_5.x86_64 13/28 Updating : 32:bind-license-9.9.4-61.el7_5.1.noarch 14/28 Cleanup : 32:bind-license-9.9.4-61.el7.noarch 15/28 Cleanup : dracut-033-535.el7.x86_64 16/28 Cleanup : systemd-219-57.el7.x86_64 17/28 Cleanup : util-linux-2.23.2-52.el7.x86_64 18/28 Cleanup : libmount-2.23.2-52.el7.x86_64 19/28 Cleanup : libblkid-2.23.2-52.el7.x86_64 20/28 Cleanup : nss-tools-3.36.0-5.el7_5.x86_64 21/28 Cleanup : centos-release-7-5.1804.1.el7.centos.x86_64 22/28 Cleanup : nss-sysinit-3.36.0-5.el7_5.x86_64 23/28 Cleanup : nss-3.36.0-5.el7_5.x86_64 24/28 Cleanup : libuuid-2.23.2-52.el7.x86_64 25/28 Cleanup : audit-libs-2.8.1-3.el7.x86_64 26/28 Cleanup : systemd-libs-219-57.el7.x86_64 27/28 Cleanup : kpartx-0.4.9-119.el7.x86_64 28/28 Verifying : nss-3.36.0-7.el7_5.x86_64 1/28 Verifying : kpartx-0.4.9-119.el7_5.1.x86_64 2/28 Verifying : libmount-2.23.2-52.el7_5.1.x86_64 3/28 Verifying : centos-release-7-5.1804.4.el7.centos.x86_64 4/28 Verifying : 32:bind-license-9.9.4-61.el7_5.1.noarch 5/28 Verifying : libuuid-2.23.2-52.el7_5.1.x86_64 6/28 Verifying : audit-libs-2.8.1-3.el7_5.1.x86_64 7/28 Verifying : systemd-219-57.el7_5.3.x86_64 8/28 Verifying : systemd-libs-219-57.el7_5.3.x86_64 9/28 Verifying : dracut-033-535.el7_5.1.x86_64 10/28 Verifying : nss-sysinit-3.36.0-7.el7_5.x86_64 11/28 Verifying : libblkid-2.23.2-52.el7_5.1.x86_64 12/28 Verifying : nss-tools-3.36.0-7.el7_5.x86_64 13/28 Verifying : util-linux-2.23.2-52.el7_5.1.x86_64 14/28 Verifying : libmount-2.23.2-52.el7.x86_64 15/28 Verifying : nss-tools-3.36.0-5.el7_5.x86_64 16/28 Verifying : audit-libs-2.8.1-3.el7.x86_64 17/28 Verifying : libblkid-2.23.2-52.el7.x86_64 18/28 Verifying : kpartx-0.4.9-119.el7.x86_64 19/28 Verifying : nss-sysinit-3.36.0-5.el7_5.x86_64 20/28 Verifying : systemd-libs-219-57.el7.x86_64 21/28 Verifying : dracut-033-535.el7.x86_64 22/28 Verifying : util-linux-2.23.2-52.el7.x86_64 23/28 Verifying : systemd-219-57.el7.x86_64 24/28 Verifying : 32:bind-license-9.9.4-61.el7.noarch 25/28 Verifying : centos-release-7-5.1804.1.el7.centos.x86_64 26/28 Verifying : nss-3.36.0-5.el7_5.x86_64 27/28 Verifying : libuuid-2.23.2-52.el7.x86_64 28/28
Updated: audit-libs.x86_64 0:2.8.1-3.el7_5.1 bind-license.noarch 32:9.9.4-61.el7_5.1 centos-release.x86_64 0:7-5.1804.4.el7.centos dracut.x86_64 0:033-535.el7_5.1 kpartx.x86_64 0:0.4.9-119.el7_5.1 libblkid.x86_64 0:2.23.2-52.el7_5.1 libmount.x86_64 0:2.23.2-52.el7_5.1 libuuid.x86_64 0:2.23.2-52.el7_5.1 nss.x86_64 0:3.36.0-7.el7_5 nss-sysinit.x86_64 0:3.36.0-7.el7_5 nss-tools.x86_64 0:3.36.0-7.el7_5 systemd.x86_64 0:219-57.el7_5.3 systemd-libs.x86_64 0:219-57.el7_5.3 util-linux.x86_64 0:2.23.2-52.el7_5.1
Complete! Removing intermediate container 1741f6cdec56 ---> 79474d207116 Step 8/11 : RUN yum clean all ---> Running in d36149efe71c Loaded plugins: fastestmirror, ovl Cleaning repos: base extras gf updates Cleaning up everything Maybe you want: rm -rf /var/cache/yum, to also free up space taken by orphaned data from disabled or removed repos Cleaning up list of fastest mirrors Removing intermediate container d36149efe71c ---> 0f5c253306f3 Step 9/11 : RUN postconf inet_protocols="ipv4" ---> Running in 4a8e76907a2f Removing intermediate container 4a8e76907a2f ---> deb434e4fdf6 Step 10/11 : EXPOSE 25 ---> Running in ecb40ae67267 Removing intermediate container ecb40ae67267 ---> 8ea7ac3c4d56 Step 11/11 : CMD ["postfix","start-fg"] ---> Running in af621bcb1493 Removing intermediate container af621bcb1493 ---> cd40901a02fe Successfully built cd40901a02fe Successfully tagged chadcordero/postfix3:latest
容器似乎正常运行。
$ docker run --rm -it -p 2525:25 chadcordero/postfix3
postfix/postfix-script: starting the Postfix mail system
但是，我无法连接到端口。
$ telnet 192.168.99.100 2525
Trying 192.168.99.100...
telnet: connect to address 192.168.99.100: Connection refused
telnet: Unable to connect to remote host
我正在MacOS 10.13.6上测试运行Docker 18.06.1-ce-mac73（26764）的容器。