18 Install/configure multiple postgreSQL instances on Centos 7 with systemctl

In this post, I am going to create three postgreSQL instance on the same host. I can not seem to find right twiki for how to do it therefore I create this article  in case if other people may want to do the same.

Install Centos 7

use ip addr to check the networking

Post configuration for Centos 7

# install some package I like to have

yum install perl gcc gpm screen kernel-devel net-tools patch wget

init 6

# install vmware-tools 

mkdir cdrom

mount /dev/cdtom /media/cdrom

tar xvzf /media/cdrom/VMwareTools-9.2.2-893683.tar.gz

vmware-install.pl

I encounter the issue for install the vmware-tools. It seems to be the issue on the VMWare-tools that can not work in the Centos7 but I can not find the solutions. 

Add user : postsqldba and create .screenrc

useradd postsqldba

passwd postsqldba

Login as postsqldba. Here is my .screenrc

# Start message

startup_message off

escape ^Xx

# Set hardstatus always on

caption always "%{=u .d} %-w%<%{=ub .B}%n %t%{=u .d}%+w "

hardstatus alwaysignore

hardstatus alwayslastline "%{= .K} [%l]%<%=%{= .W}@%H %=%{= .y} %Y %M %d(%D) %{= .m} %C %A"

# Set default encoding using utf8

defutf8 on

# Refresh the display when exiting programs

altscreen on

# Dynamic title

shelltitle '$ |bash'

# Disable vbell

vbell off

# Keboard binding

# bind F11 to move to previous window

bindkey -k F1 prev

# bind F12 to move to next window

bindkey -k F2 next

# bind Alt`~= to screen0~12

bindkey "^[`" select 0

bindkey "^[1" select 1

bindkey "^[2" select 2

bindkey "^[3" select 3

bindkey "^[4" select 4

bindkey "^[5" select 5

bindkey "^[6" select 6

bindkey "^[7" select 7

bindkey "^[8" select 8

bindkey "^[9" select 9

bindkey "^[0" select 10

bindkey "^[-" select 11

bindkey "^[=" select 12

# bind F7 to detach screen session (to background)

bindkey -k k7 detach

# bind F8 to kill current screen window

bindkey -k k8 kill

# bind F9 to create a new screen

bindkey -k k9 screen

# bind F10 to rename current screen window

bindkey -k k; title

Install PostgreSQL 9.3

The yum repository does not have the latest postgre 9.3. Therefore we have to manually install from postgresql.org.

yum install http://yum.postgresql.org/9.3/redhat/rhel-6-x86_64/pgdg-redhat93-9.3-1.noarch.rpm

yum install postgresql93-server postgresql93-contrib

Post install : initdb

/usr/pgsql-9.3/bin/initdb -D /home/postsqldba/inst1 -U  postsqldba

/usr/pgsql-9.3/bin/initdb -D /home/postsqldba/inst2 -U  postsqldba

Create service file

create /etc/systemd/system/postgresql-*.service for each instance.

.include /lib/systemd/system/postgresql-9.3.service

[Service]

Environment=PGDATA=/home/postsqldba/inst1

Environment=PGPORT=7001

User=postsqldba

Group=postsqldba

Register new instance with systemctl

systemctl enable postgresql-inst1

systemctl start postgresql-inst1

systemctl status postgresql-inst1

systemctl enable postgresql-inst2

systemctl start postgresql-inst2

systemctl status postgresql-inst2

Test connectivity

Trouble shooting with systemctl

journalctl -xn