我正在按照https://github.com/2ndQuadrant/pglogical的说明在Centos 8上的postgres 12上安装 pglogical 。安装似乎成功：
yum -y install postgresql12-pglogical
Last metadata expiration check: 0:21:30 ago on Wed 30 Sep 2020 09:32:13 PM CDT.
Dependencies resolved.
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Package Architecture Version Repository Size
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Installing:
postgresql12-pglogical x86_64 2.3.2-1.el8 2ndquadrant-dl-default-release-pg12 145 k
Installing dependencies:
postgresql12 x86_64 12.4-1PGDG.rhel8 pgdg12 1.6 M
postgresql12-server x86_64 12.4-1PGDG.rhel8 pgdg12 5.2 M
Transaction Summary
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Install 3 Packages
Total download size: 7.0 M
Installed size: 29 M
Downloading Packages:
(1/3): postgresql12-12.4-1PGDG.rhel8.x86_64.rpm 1.5 MB/s | 1.6 MB 00:01
(2/3): postgresql12-pglogical-2.3.2-1.el8.x86_64.rpm 117 kB/s | 145 kB 00:01
(3/3): postgresql12-server-12.4-1PGDG.rhel8.x86_64.rpm 4.0 MB/s | 5.2 MB 00:01
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Total 5.3 MB/s | 7.0 MB 00:01
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : postgresql12-12.4-1PGDG.rhel8.x86_64 1/3
Running scriptlet: postgresql12-12.4-1PGDG.rhel8.x86_64 1/3
failed to link /usr/bin/psql -> /etc/alternatives/pgsql-psql: /usr/bin/psql exists and it is not a symlink
failed to link /usr/bin/clusterdb -> /etc/alternatives/pgsql-clusterdb: /usr/bin/clusterdb exists and it is not a symlink
failed to link /usr/bin/createdb -> /etc/alternatives/pgsql-createdb: /usr/bin/createdb exists and it is not a symlink
failed to link /usr/bin/createuser -> /etc/alternatives/pgsql-createuser: /usr/bin/createuser exists and it is not a symlink
failed to link /usr/bin/dropdb -> /etc/alternatives/pgsql-dropdb: /usr/bin/dropdb exists and it is not a symlink
failed to link /usr/bin/dropuser -> /etc/alternatives/pgsql-dropuser: /usr/bin/dropuser exists and it is not a symlink
failed to link /usr/bin/pg_basebackup -> /etc/alternatives/pgsql-pg_basebackup: /usr/bin/pg_basebackup exists and it is not a symlink
failed to link /usr/bin/pg_dump -> /etc/alternatives/pgsql-pg_dump: /usr/bin/pg_dump exists and it is not a symlink
failed to link /usr/bin/pg_dumpall -> /etc/alternatives/pgsql-pg_dumpall: /usr/bin/pg_dumpall exists and it is not a symlink
failed to link /usr/bin/pg_restore -> /etc/alternatives/pgsql-pg_restore: /usr/bin/pg_restore exists and it is not a symlink
failed to link /usr/bin/reindexdb -> /etc/alternatives/pgsql-reindexdb: /usr/bin/reindexdb exists and it is not a symlink
failed to link /usr/bin/vacuumdb -> /etc/alternatives/pgsql-vacuumdb: /usr/bin/vacuumdb exists and it is not a symlink
Running scriptlet: postgresql12-server-12.4-1PGDG.rhel8.x86_64 2/3
Installing : postgresql12-server-12.4-1PGDG.rhel8.x86_64 2/3
Running scriptlet: postgresql12-server-12.4-1PGDG.rhel8.x86_64 2/3
Installing : postgresql12-pglogical-2.3.2-1.el8.x86_64 3/3
Running scriptlet: postgresql12-pglogical-2.3.2-1.el8.x86_64 3/3
Verifying : postgresql12-pglogical-2.3.2-1.el8.x86_64 1/3
Verifying : postgresql12-12.4-1PGDG.rhel8.x86_64 2/3
Verifying : postgresql12-server-12.4-1PGDG.rhel8.x86_64 3/3
Installed:
postgresql12-12.4-1PGDG.rhel8.x86_64 postgresql12-pglogical-2.3.2-1.el8.x86_64 postgresql12-server-12.4-1PGDG.rhel8.x86_64
Complete!
但是当我尝试重新启动 postgres 时，我收到了这个错误
systemctl restart postgresql
Job for postgresql.service failed because the control process exited with error code.
See "systemctl status postgresql.service" and "journalctl -xe" for details.
journalctl -xe的相关部分
-- Unit postgresql.service has begun starting up.
Sep 30 21:54:59 aba postmaster[305963]: 2020-10-01 02:54:59.825 UTC [305963] FATAL: could not access file "pglogical": No such file or directory
Sep 30 21:54:59 aba postmaster[305963]: 2020-10-01 02:54:59.825 UTC [305963] LOG: database system is shut down
Sep 30 21:54:59 aba systemd[1]: postgresql.service: Main process exited, code=exited, status=1/FAILURE
Sep 30 21:54:59 aba systemd[1]: postgresql.service: Failed with result 'exit-code'.
Sep 30 21:54:59 aba systemd[1]: Failed to start PostgreSQL database server.
-- Subject: Unit postgresql.service has failed
-- Defined-By: systemd
-- Support: https://access.redhat.com/support
--
-- Unit postgresql.service has failed.
--
-- The result is failed.
我搞不清楚了！