CentOS deploy PostgreSQL 13

pg Database download address

Create groups and users ,pg The database cannot be used for security root Start and stop .

grouadd postgres
useradd -g postgres postgres

passwd postgres # Set the password 

Upload Download the installation package from the official website and extract

tar -zxvf postgresql-13.3.tar.gz
yum -y install gcc  readline-devel zlib zlib-devel # Installation dependency 

cd postgresql-13.3/ # Go to unzip directory 

./configure --prefix=/opt/postgres  # Conduct ./configure,make,make install
make && make install   # adopt  echo $?  To check whether the execution is successful 

 

 

Setup after installation  postgres  User variables

su - postgres # Switch to  postgres  user 

vim .bash_profile 

# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs

export PGHOME=/opt/postgres  # add to   Set up pg  Database installation directory 
export PGDATA=/opt/postgres/data  # add to   Set up pg  Database data  Catalog 
PATH=$PATH:$HOME/bin:$PGHOME/bin  # take PATH  Variable 
PATH=$PATH:$HOME/.local/bin:$HOME/bin

export PATH

exit # Return to root  user  
 stay  pg Under the installation directory of  data Catalog 
mkdir /opt/postgres/data
 to  pg  Installation directory settings postgres  jurisdiction 
chown -R postgres：postgres /opt/postgres/

su - postgres # Switch to postgres  user 
initdb # Perform database initialization 

cd /opt/postgres/data  # After successful initialization , Get into data Directory modification configuration file 

postgresql.conf #pg Profile of the database  
pg_hba.conf   # Access policy Profile 

vim pg_hba.conf  # Edit the access policy configuration file ,G  Go to the end of the text .

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     trust
# IPv4 local connections:
host    all             all             127.0.0.1/32            trust
# IPv6 local connections:
host    all             all             ::1/128                 trust
# Allow replication connections from localhost, by a user with the
# replication privilege.
local   replication     all                                     trust
host    replication     all             127.0.0.1/32            trust
host    replication     all             ::1/128                 trust
host    all             all             0.0.0.0/0               md5

TYPE Indicates the host type

The value is `local` Said is unix-domain Of socket Connect ,

The value is `host` yes TCP/IP socket

The value is `hostssl` yes SSL Encrypted TCP/IP socket

DATABASE Represents the database name

The value is ： `all` ,`sameuser`,`samerole`,`replication`,` Database name ` , Or more Database name is ` comma `, Be careful ALL Mismatch replication

USER Represents the user name

`all（ All ）`,` A user name `,` A set of user names ` , When there are multiple users , It can be used `,` commas , Or in the user name prefix `+` ;

ADDRESS Parameters

Accessible address , Source address , Local 127.0.0.1/32, Multiple IP Use English comma to separate , Use IP Change the number of mask bits when segment , for example ：10.10.10.0/0.

METHOD authentication

trust: Allow connections... Unconditionally , No password is required for login , unsafe .

reject: The connection rejects unconditionally , Often used from a group " Filter " Some hosts .

md5: Ask the client to provide a MD5 Encrypted password for authentication .

password: and "md5" equally , But the password is passed on the network in clear text , We should not use this method on insecure networks .

vim postgresql.conf # Set up pg The configuration file 

listen_addresses = '*' 
port = 5432
max_connections = 500
shared_buffers = 512MB
logging_collector = on
log_directory = 'pg_log'
log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'
log_rotation_size = 1GB
log_statement = 'mod'
timezone = 'Asia/Shanghai'

listen_addresses ：  You can connect to the server to use IP, The general initial value is localhost perhaps local, This means that only the local computer can connect to the database .  It is generally set to " * " , Allow all IP Connect to database .

port ：  Listening port , The default is 5432.

max_connections ：  Maximum number of concurrent connections allowed .

share_buffers：  Shared cache size , It mainly stores the recently accessed data pages . It is recommended to set the server 25% system memory .

logging_collector = on： log enable .

log_directory = 'pg_log'： Specify where to store the logs , stay data Under the table of contents .

log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'：log_filename: The naming format of the log , The default is postgresql-%Y-%m-%d_%H%M%S.log. Support strftime Format .%Y-%m Wait for the year representing time - month - Day, etc. .

log_rotation_size = 1GB： Maximum disk space of log file .

log_statement = 'mod'： Record various operations of users after logging into the database ,

mod( Record ddl+insert,delete,update and truncate)

ddl( Record create,drop and alter)

timezone = 'Asia/Shanghai'： pg Time zone setting of database .

[[email protected] ~]$ pg_ctl -D /opt/postgres/data start  # start-up pg database  
waiting for server to start......2022-06-07 11:46:19.757 CST [6625] LOG:  redirecting log output to logging collector process
2022-06-09 11:46:19.757 CST [6625] HINT:  Future log output will appear in directory "pg_log".
 done
server started  # Successful launch    Log in pg_log  Next 

start  start-up  stop  stop it  restart  restart （ It's best to restart after some configuration changes ）

[[email protected] ~]$ psql -U postgres 
postgres=# ALTER USER postgres WITH PASSWORD '123456'; # change postgres  User's password .
ALTER ROLE
postgres=#

That's the end for the time being , We will continue to update about PG Some operation and maintenance of data , Collect some likes ！