Install postgresql on centos 7

Installing postgresql

Fedora, RHEL, CentOS, or similar OS

# yum install postgresql
# yum install postgresql-server

Initialize postgresql Files

# postgresql-setup initdb

Setup postgresql

  1. Set method of the address and ::1 to trust at the pg_hba.conf file. The directory might not be visible to non-sudoers. Run sudo su first.

    Varnish and nginx on Centos 7

    yum install varnish
    yum install nginx

    Config nginx listen on port 8081

    server {
            listen 8081;
            server_name www.example.com;
            rewrite ^(.*) http://example.com$1 permanent;
    server {
            listen 8081 default_server;
            server_name example.com;


    • Config varnish: vi /etc/varnish/default.vcl (for wordpress)
    # This is an example VCL file for Varnish.
    # It does not do anything by default, delegating control to the

    Configure rsyslogd on centos 7 as remote syslog server


    echo "\$ModLoad imudp" > /etc/rsyslog.d/server.conf
    echo "\$UDPServerRun 514" >> /etc/rsyslog.d/server.conf
    echo "\$ModLoad imtcp" >> /etc/rsyslog.d/server.conf
    echo "\$InputTCPServerRun 514" >> /etc/rsyslog.d/server.conf
    echo "\$PreserveFQDN on" >> /etc/rsyslog.d/server.conf
    yum -y install rsyslog-gnutls rsyslog-mysql rsyslog-crypto

    MySQL/MariaDB database configuration

    Assuming MariaDB is already installed and running.

    rsyslog centos7

    Maxscale and pacemaker on centos 7

    Install packages on both nodes

    sudo yum install corosync pcs pacemaker maxscale

    Set the password for the hacluster user [both nodes]

    sudo passwd hacluster

    Start the pcs daemon service [both nodes]

    sudo systemctl start pcsd

    Authenticate the cluster

    sudo pcs cluster auth node01.domain.local node02.domain.local

    Create cluster

    Install RabbitMQ on centos 7

    Install RabbitMQ on CentOS 7

    sudo yum -y install epel-release
    sudo yum -y update

    Install Erlang

    Download repository

    wget http://packages.erlang-solutions.com/erlang-solutions-1.0-1.noarch.rpm

    Add repository

    sudo rpm -Uvh erlang-solutions-1.0-1.noarch.rpm

    Install erlang and dependencies

    sudo yum -y install erlang socat logrotate

    Install RabbitMQ

    Download RabbitMQ package

    rabbitmq centos7

    Kerberos setup on centos 7

    Installing Kerberos on Redhat 7

    This installation is going to require 2 servers one acts as kerberos KDC server and the other machine is going to be client. Lets assume the FQDN's are (here cw.com is the domain name, make a note of the domain name here): * Kerberos KDC Server: kdc.cw.com * Kerberos Client: kclient.cw.com

    kerberos centos7

    Adagios and naemon install on centos 7

    Adagios and Naemon on CentOS 7 or Red Hat Enterprise Linux 7 x86_64.

    If you don't know how to configure SElinux, put it in permissive mode:

    sed -i "s/SELINUX=enforcing/SELINUX=permissive/" /etc/selinux/config
    setenforce 0

    First install the opensource.is and consol labs repositories

    rpm -ihv http://opensource.is/repo/ok-release.rpm
    rpm -Uvh https://labs.consol.de/repo/stable/rhel7/x86_64/labs-consol-stable.rhel7.noarch.rpm
    yum update -y ok-release

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