标签：关于 notify files ring get framework iter snapshot 打开
国庆之后，云栖大会杭州分会上相关专家做了一个关于Postgresql的专题分享，其中提到了Postgresql 10的一些新特性，个人感觉倍受鼓舞，接下来希望分别针对Ubuntu 16.04LTS和Fedora27上如何安装并配置Postgresql 10做一个简要介绍。这篇博客主要针对Fedora 27做简要介绍。大家进入Postgresql官网下载页面，选择
数据版本postgreql10，Linux 发行套件Fedora 27，然后选择64位，即x86_64，这个时候就会出现相关的安装脚本。
lwk@fedora1 ~ $ sudo dnf install https://download.postgresql.org/pub/repos/yum/10/fedora/fedora-27-x86_64/pgdg-fedora10-10-3.noarch.rpm
Last metadata expiration check: 7:30:40 ago on Tue 02 Jan 2018 10:32:40 AM CST.
pgdg-fedora10-10-3.noarch.rpm 6.9 kB/s | 8.8 kB 00:01
Dependencies resolved.
==============================================================================================================================================================================================================================================
Package Arch Version Repository Size
==============================================================================================================================================================================================================================================
Installing:
pgdg-fedora10 noarch 10-3 @commandline 8.8 k
Transaction Summary
==============================================================================================================================================================================================================================================
Install 1 Package
Total size: 8.8 k
Installed size: 3.2 k
Is this ok [y/N]: y
Downloading Packages:
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : pgdg-fedora10-10-3.noarch 1/1
Verifying : pgdg-fedora10-10-3.noarch 1/1
Installed:
pgdg-fedora10.noarch 10-3
Complete!
lwk@fedora1 ~ $ sudo dnf install postgresql10-server postgresql10
PostgreSQL 10 27 - x86_64 76 kB/s | 164 kB 00:02
Last metadata expiration check: 0:00:00 ago on Tue 02 Jan 2018 06:03:33 PM CST.
Dependencies resolved.
==============================================================================================================================================================================================================================================
Package Arch Version Repository Size
==============================================================================================================================================================================================================================================
Installing:
postgresql10 x86_64 10.1-1PGDG.f27 pgdg10 1.5 M
postgresql10-server x86_64 10.1-1PGDG.f27 pgdg10 4.4 M
Installing dependencies:
libicu x86_64 57.1-9.fc27 updates 8.4 M
postgresql10-libs x86_64 10.1-1PGDG.f27 pgdg10 354 k
Transaction Summary
==============================================================================================================================================================================================================================================
Install 4 Packages
Total download size: 15 M
Installed size: 54 M
Is this ok [y/N]: y
Downloading Packages:
(1/4): postgresql10-10.1-1PGDG.f27.x86_64.rpm 203 kB/s | 1.5 MB 00:07
(2/4): libicu-57.1-9.fc27.x86_64.rpm 3.8 MB/s | 8.4 MB 00:02
(3/4): postgresql10-libs-10.1-1PGDG.f27.x86_64.rpm 36 kB/s | 354 kB 00:09
(4/4): postgresql10-server-10.1-1PGDG.f27.x86_64.rpm 138 kB/s | 4.4 MB 00:32
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 460 kB/s | 15 MB 00:32
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : libicu-57.1-9.fc27.x86_64 1/4
Running scriptlet: libicu-57.1-9.fc27.x86_64 1/4
Installing : postgresql10-libs-10.1-1PGDG.f27.x86_64 2/4
Running scriptlet: postgresql10-libs-10.1-1PGDG.f27.x86_64 2/4
Installing : postgresql10-10.1-1PGDG.f27.x86_64 3/4
Running scriptlet: postgresql10-10.1-1PGDG.f27.x86_64 3/4
Running scriptlet: postgresql10-server-10.1-1PGDG.f27.x86_64 4/4
Installing : postgresql10-server-10.1-1PGDG.f27.x86_64 4/4
Running scriptlet: postgresql10-server-10.1-1PGDG.f27.x86_64 4/4
Verifying : postgresql10-server-10.1-1PGDG.f27.x86_64 1/4
Verifying : postgresql10-10.1-1PGDG.f27.x86_64 2/4
Verifying : postgresql10-libs-10.1-1PGDG.f27.x86_64 3/4
Verifying : libicu-57.1-9.fc27.x86_64 4/4
Installed:
postgresql10.x86_64 10.1-1PGDG.f27 postgresql10-server.x86_64 10.1-1PGDG.f27 libicu.x86_64 57.1-9.fc27 postgresql10-libs.x86_64 10.1-1PGDG.f27
Complete!这里要说的是dnf和yum是类似的，在性能上比yum更高效，这也是接下来
redhat旗下相发行套件的主流包管理工具。
lwk@fedora1 ~ $ sudo /usr/pgsql-10/bin/postgresql-10-setup initdb
Initializing database ... OK
lwk@fedora1 ~ $ sudo systemctl enable postgresql-10.service
Created symlink /etc/systemd/system/multi-user.target.wants/postgresql-10.service → /usr/lib/systemd/system/postgresql-10.service.
lwk@fedora1 ~ $ sudo systemctl start postgresql-10.service
lwk@fedora1 ~ $ sudo systemctl status postgresql-10.service
● postgresql-10.service - PostgreSQL 10 database server
Loaded: loaded (/usr/lib/systemd/system/postgresql-10.service; enabled; vendor preset: disabled)
Active: active (running) since Tue 2018-01-02 18:07:03 CST; 12s ago
Docs: https://www.postgresql.org/docs/10/static/
Process: 4654 ExecStartPre=/usr/pgsql-10/bin/postgresql-10-check-db-dir ${PGDATA} (code=exited, status=0/SUCCESS)
Main PID: 4659 (postmaster)
Tasks: 8 (limit: 4915)
CGroup: /system.slice/postgresql-10.service
├─4659 /usr/pgsql-10/bin/postmaster -D /var/lib/pgsql/10/data/
├─4660 postgres: logger process
├─4662 postgres: checkpointer process
├─4663 postgres: writer process
├─4664 postgres: wal writer process
├─4665 postgres: autovacuum launcher process
├─4666 postgres: stats collector process
└─4667 postgres: bgworker: logical replication launcher
Jan 02 18:07:03 fedora1 systemd[1]: Starting PostgreSQL 10 database server...
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.166 CST [4659] LOG: listening on IPv6 address "::1", port 5432
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.166 CST [4659] LOG: listening on IPv4 address "127.0.0.1", port 5432
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.168 CST [4659] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.170 CST [4659] LOG: listening on Unix socket "/tmp/.s.PGSQL.5432"
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.176 CST [4659] LOG: redirecting log output to logging collector process
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.176 CST [4659] HINT: Future log output will appear in directory "log".
Jan 02 18:07:03 fedora1 systemd[1]: Started PostgreSQL 10 database server.
postgres@fedora1 ~ $ psql
psql (10.1)
Type "help" for help.
postgres=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+----------+----------+-------------+-------------+-----------------------
postgres | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
template0 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
(3 rows)
postgres=#
我们知道通常情况下，需要在主机以外的主机上访问postgresql服务，但是默认情况下，postgresql仅仅只提供本地访问，要让其他主机也可以访问，需要做如下配置。
fedora旗下发行套件中的postgresql配置文件主要在数据目录，即/var/lib/pgsql/10/data/下
postgres@fedora1 ~ $ psql
psql (10.1)
Type "help" for help.
postgres=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+----------+----------+-------------+-------------+-----------------------
postgres | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
template0 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
(3 rows)
postgres=# \q
postgres@fedora1 ~ $ ll /var/lib/pgsql/10/data/
total 136
drwx------. 20 postgres postgres 4096 Jan 2 18:07 .
drwx------. 4 postgres postgres 4096 Jan 2 18:06 ..
drwx------. 5 postgres postgres 4096 Jan 2 18:06 base
-rw-------. 1 postgres postgres 30 Jan 2 18:07 current_logfiles
drwx------. 2 postgres postgres 4096 Jan 2 18:08 global
drwx------. 2 postgres postgres 4096 Jan 2 18:07 log
drwx------. 2 postgres postgres 4096 Jan 2 18:06 pg_commit_ts
drwx------. 2 postgres postgres 4096 Jan 2 18:06 pg_dynshmem
-rw-------. 1 postgres postgres 4269 Jan 2 18:06 pg_hba.conf
-rw-------. 1 postgres postgres 1636 Jan 2 18:06 pg_ident.conf
drwx------. 4 postgres postgres 4096 Jan 2 18:12 pg_logical
drwx------. 4 postgres postgres 4096 Jan 2 18:06 pg_multixact
drwx------. 2 postgres postgres 4096 Jan 2 18:07 pg_notify
drwx------. 2 postgres postgres 4096 Jan 2 18:06 pg_replslot
drwx------. 2 postgres postgres 4096 Jan 2 18:06 pg_serial
drwx------. 2 postgres postgres 4096 Jan 2 18:06 pg_snapshots
drwx------. 2 postgres postgres 4096 Jan 2 18:06 pg_stat
drwx------. 2 postgres postgres 4096 Jan 2 18:21 pg_stat_tmp
drwx------. 2 postgres postgres 4096 Jan 2 18:06 pg_subtrans
drwx------. 2 postgres postgres 4096 Jan 2 18:06 pg_tblspc
drwx------. 2 postgres postgres 4096 Jan 2 18:06 pg_twophase
-rw-------. 1 postgres postgres 3 Jan 2 18:06 PG_VERSION
drwx------. 3 postgres postgres 4096 Jan 2 18:06 pg_wal
drwx------. 2 postgres postgres 4096 Jan 2 18:06 pg_xact
-rw-------. 1 postgres postgres 88 Jan 2 18:06 postgresql.auto.conf
-rw-------. 1 postgres postgres 22761 Jan 2 18:06 postgresql.conf
-rw-------. 1 postgres postgres 58 Jan 2 18:07 postmaster.opts
-rw-------. 1 postgres postgres 103 Jan 2 18:07 postmaster.pid
postgres@fedora1 ~ $
我们先修改配置postgresql.conf，打开对非主机访问的限制，用vim打开该文件，
59 #listen_addresses = ‘localhost‘ # what IP address(es) to listen on;修改为
59 #listen_addresses = ‘*‘ # what IP address(es) to listen on;
再用vim打开文件pg_hba.conf，找到82行
82 host all all 127.0.0.1/32 ident后面追加
83 host all all 192.168.1.0/24 trust这时，重新启动postgresql数据库。
postgres@fedora1 ~ $ vim /var/lib/pgsql/10/data/postgresql.conf
postgres@fedora1 ~ $ vim /var/lib/pgsql/10/data/pg_hba.conf
postgres@fedora1 ~ $ exit
logout
lwk@fedora1 ~ $ sudo systemctl start postgresql-10.service
[sudo] password for lwk:
lwk@fedora1 ~ $ sudo systemctl status postgresql-10.service
● postgresql-10.service - PostgreSQL 10 database server
Loaded: loaded (/usr/lib/systemd/system/postgresql-10.service; enabled; vendor preset: disabled)
Active: active (running) since Tue 2018-01-02 18:07:03 CST; 29min ago
Docs: https://www.postgresql.org/docs/10/static/
Process: 4654 ExecStartPre=/usr/pgsql-10/bin/postgresql-10-check-db-dir ${PGDATA} (code=exited, status=0/SUCCESS)
Main PID: 4659 (postmaster)
Tasks: 8 (limit: 4915)
CGroup: /system.slice/postgresql-10.service
├─4659 /usr/pgsql-10/bin/postmaster -D /var/lib/pgsql/10/data/
├─4660 postgres: logger process
├─4662 postgres: checkpointer process
├─4663 postgres: writer process
├─4664 postgres: wal writer process
├─4665 postgres: autovacuum launcher process
├─4666 postgres: stats collector process
└─4667 postgres: bgworker: logical replication launcher
Jan 02 18:07:03 fedora1 systemd[1]: Starting PostgreSQL 10 database server...
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.166 CST [4659] LOG: listening on IPv6 address "::1", port 5432
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.166 CST [4659] LOG: listening on IPv4 address "127.0.0.1", port 5432
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.168 CST [4659] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.170 CST [4659] LOG: listening on Unix socket "/tmp/.s.PGSQL.5432"
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.176 CST [4659] LOG: redirecting log output to logging collector process
Jan 02 18:07:03 fedora1 postmaster[4659]: 2018-01-02 18:07:03.176 CST [4659] HINT: Future log output will appear in directory "log".
Jan 02 18:07:03 fedora1 systemd[1]: Started PostgreSQL 10 database server.
lwk@fedora1 ~ $ 修改防火墙配置将将端口号5432添加到防火墙白名单中去。方法很多，这里采用ufw
lwk@fedora1 ~ $ dnf list ufw
Last metadata expiration check: 0:00:36 ago on Tue 02 Jan 2018 06:41:47 PM CST.
Available Packages
ufw.noarch 0.35-9.fc27 fedora
lwk@fedora1 ~ $ sudo dnf install ufw
Last metadata expiration check: 0:39:13 ago on Tue 02 Jan 2018 06:03:33 PM CST.
Dependencies resolved.
==============================================================================================================================================================================================================================================
Package Arch Version Repository Size
==============================================================================================================================================================================================================================================
Installing:
ufw noarch 0.35-9.fc27 fedora 222 k
Transaction Summary
==============================================================================================================================================================================================================================================
Install 1 Package
Total download size: 222 k
Installed size: 978 k
Is this ok [y/N]: y
Downloading Packages:
ufw-0.35-9.fc27.noarch.rpm 99 kB/s | 222 kB 00:02
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 98 kB/s | 222 kB 00:02
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : ufw-0.35-9.fc27.noarch 1/1
Running scriptlet: ufw-0.35-9.fc27.noarch 1/1
Running as unit: run-rcf2b3a65bf7d43b78a6d1e515b174178.service
Verifying : ufw-0.35-9.fc27.noarch 1/1
Installed:
ufw.noarch 0.35-9.fc27
Complete!
lwk@fedora1 ~ $
lwk@fedora1 ~ $ sudo ufw status
Status: inactive
lwk@fedora1 ~ $ sudo ufw enable
Command may disrupt existing ssh connections. Proceed with operation (y|n)? y
Firewall is active and enabled on system startup
lwk@fedora1 ~ $ sudo ufw status
Status: active
To Action From
-- ------ ----
SSH ALLOW Anywhere
224.0.0.251 mDNS ALLOW Anywhere
SSH (v6) ALLOW Anywhere (v6)
ff02::fb mDNS ALLOW Anywhere (v6)
lwk@fedora1 ~ $ sudo ufw allow 5432
Rule added
Rule added (v6)
lwk@fedora1 ~ $ sudo ufw default deny
Default incoming policy changed to ‘deny‘
(be sure to update your rules accordingly)
lwk@fedora1 ~ $ sudo systemctl enable ufw.service
Created symlink /etc/systemd/system/basic.target.wants/ufw.service → /usr/lib/systemd/system/ufw.service.
lwk@fedora1 ~ $ sudo systemctl restart ufw.service
lwk@fedora1 ~ $ sudo systemctl status ufw.service
● ufw.service - Uncomplicated firewall
Loaded: loaded (/usr/lib/systemd/system/ufw.service; enabled; vendor preset: disabled)
Active: active (exited) since Tue 2018-01-02 18:47:35 CST; 13s ago
Docs: man:ufw(8)
man:ufw-framework(8)
file://usr/share/doc/ufw/README
Process: 6171 ExecStart=/usr/libexec/ufw/ufw-init start (code=exited, status=0/SUCCESS)
Main PID: 6171 (code=exited, status=0/SUCCESS)
Jan 02 18:47:34 fedora1 systemd[1]: Starting Uncomplicated firewall...
Jan 02 18:47:35 fedora1 systemd[1]: Started Uncomplicated firewall.
lwk@fedora1 ~ $ sudo ufw status
Status: active
To Action From
-- ------ ----
SSH ALLOW Anywhere
224.0.0.251 mDNS ALLOW Anywhere
5432 ALLOW Anywhere
SSH (v6) ALLOW Anywhere (v6)
ff02::fb mDNS ALLOW Anywhere (v6)
5432 (v6) ALLOW Anywhere (v6)
lwk@fedora1 ~ $ Install PostgreSql in Fedora 27
标签：关于 notify files ring get framework iter snapshot 打开
原文地址：http://blog.51cto.com/qwfys200/2071412
