如何在 Docker 中的 CentOS 上运行 PostgreSQL?

如何在 Docker 中的 CentOS 上运行 PostgreSQL?

我运行了centos:7.1.1503然后yum install postgresql。不幸的是,由于 systemd 问题,service postgresql start即使安装后我也无法运行initscripts

Redirecting to /bin/systemctl start  postgresql.service
/usr/sbin/service: line 79: /bin/systemctl: No such file or directory
[root@8109c497195b ~]# yum provides systemctl  
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos2.hti.pl
 * extras: centos.komster.pl
 * updates: centos2.hti.pl
systemd-208-20.el7.x86_64 : A System and Service Manager
Repo        : base
Matched from:
Filename    : /bin/systemctl



systemd-208-20.el7_1.2.x86_64 : A System and Service Manager
Repo        : updates
Matched from:
Filename    : /bin/systemctl



systemd-208-20.el7_1.3.x86_64 : A System and Service Manager
Repo        : updates
Matched from:
Filename    : /bin/systemctl



systemd-208-20.el7_1.5.x86_64 : A System and Service Manager
Repo        : updates
Matched from:
Filename    : /bin/systemctl



systemd-208-20.el7.x86_64 : A System and Service Manager
Repo        : base
Matched from:
Filename    : /usr/bin/systemctl



systemd-208-20.el7_1.2.x86_64 : A System and Service Manager
Repo        : updates
Matched from:
Filename    : /usr/bin/systemctl



systemd-208-20.el7_1.3.x86_64 : A System and Service Manager
Repo        : updates
Matched from:
Filename    : /usr/bin/systemctl



systemd-208-20.el7_1.5.x86_64 : A System and Service Manager
Repo        : updates
Matched from:
Filename    : /usr/bin/systemctl



[root@8109c497195b ~]# yum install systemd     
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos2.hti.pl
 * extras: centos.komster.pl
 * updates: centos2.hti.pl
Resolving Dependencies
--> Running transaction check
---> Package systemd.x86_64 0:208-20.el7_1.5 will be installed
--> Processing Dependency: libcryptsetup.so.4(CRYPTSETUP_1.0)(64bit) for package: systemd-208-20.el7_1.5.x86_64
--> Processing Dependency: dbus for package: systemd-208-20.el7_1.5.x86_64
--> Processing Dependency: acl for package: systemd-208-20.el7_1.5.x86_64
--> Processing Dependency: libwrap.so.0()(64bit) for package: systemd-208-20.el7_1.5.x86_64
--> Processing Dependency: libqrencode.so.3()(64bit) for package: systemd-208-20.el7_1.5.x86_64
--> Processing Dependency: libcryptsetup.so.4()(64bit) for package: systemd-208-20.el7_1.5.x86_64
--> Running transaction check
---> Package acl.x86_64 0:2.2.51-12.el7 will be installed
---> Package cryptsetup-libs.x86_64 0:1.6.6-3.el7 will be installed
--> Processing Dependency: fipscheck-lib(x86-64) >= 1.3.0 for package: cryptsetup-libs-1.6.6-3.el7.x86_64
--> Processing Dependency: libfipscheck.so.1()(64bit) for package: cryptsetup-libs-1.6.6-3.el7.x86_64
---> Package dbus.x86_64 1:1.6.12-11.el7 will be installed
---> Package qrencode-libs.x86_64 0:3.4.1-3.el7 will be installed
---> Package tcp_wrappers-libs.x86_64 0:7.6-77.el7 will be installed
--> Running transaction check
---> Package fipscheck-lib.x86_64 0:1.4.1-5.el7 will be installed
--> Processing Dependency: /usr/bin/fipscheck for package: fipscheck-lib-1.4.1-5.el7.x86_64
--> Running transaction check
---> Package fipscheck.x86_64 0:1.4.1-5.el7 will be installed
--> Processing Conflict: fakesystemd-1-17.el7.centos.noarch conflicts systemd
--> Finished Dependency Resolution
Error: fakesystemd conflicts with systemd-208-20.el7_1.5.x86_64
 You could try using --skip-broken to work around the problem
** Found 1 pre-existing rpmdb problem(s), 'yum check' output follows:
fakesystemd-1-17.el7.centos.noarch has installed conflicts systemd: fakesystemd-1-17.el7.centos.noarch

我现在能做什么?我正在考虑从头开始构建它并以这种方式工作。

答案1

不用管 systemd,直接运行 Postgres 就行。下面展示了如何在基础 Centos7 容器内运行 Postgres:

$ docker run -it centos:centos7 /bin/bash
bash-4.2$ yum install postgresql-server sudo
[..snip..]
bash-4.2$ sudo -u postgres /usr/bin/initdb /var/lib/pgsql/data/
bash-4.2$ sudo -u postgres /usr/bin/pg_ctl start \
   -D /var/lib/pgsql/data -s -o "-p 5432" -w -t 300
bash-4.2$ ps -eo pid,args
  PID COMMAND
    1 /bin/bash
  118 /usr/bin/postgres -D /var/lib/pgsql/data -p 5432
  119 postgres: logger process   
  121 postgres: checkpointer process   
  122 postgres: writer process   
  123 postgres: wal writer process   
  124 postgres: autovacuum launcher process   
  125 postgres: stats collector process  

您可以将其放入 Dockerfile 以使其可重复使用。

答案2

https://hub.docker.com/r/centos/postgresql-10-centos7

我在这里使用命令......

--restart="总是"

选项意味着在docker启动时始终启动。

docker run -d --name postgresql --restart="always" \
        -e POSTGRESQL_USER=<你的 ID> \
        -e POSTGRESQL_PASSWORD=<你的密码> \
        -e POSTGRESQL_DATABASE=<你的数据库名称> \
        -e POSTGRESQL_ADMIN_PASSWORD=<postgres 的密码> \
        -p 5432:5432 centos/postgresql-10-centos7

试试看吧~

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