# Add Citus repository for package manager

curl https://install.citusdata.com/community/rpm.sh | sudo bash

# install PostgreSQL with Citus extension

sudo yum install -y citus72_10

# initialize system database (using RHEL  vs  method as necessary)

sudo service postgresql- initdb || sudo /usr/pgsql-/bin/postgresql--setup initdb

# preload citus extension

echo "shared_preload_libraries = 'citus'" | sudo tee -a /var/lib/pgsql//data/postgresql.conf

sudo vi /var/lib/pgsql//data/postgresql.conf

# Uncomment listen_addresses for the changes to take effect

listen_addresses = '*'

sudo vi /var/lib/pgsql//data/pg_hba.conf

local   all             all                                          peer      
local   replication     all                                          peer
host    all             all             192.168.99.1/              trust
host    all             all             0.0.0.0/0                    md5

firewall-cmd --zone=public --query-port=/tcp

firewall-cmd --zone=public --add-port=/tcp --permanent

firewall-cmd --reload

# start the db server

sudo service postgresql- restart

# and make it start automatically when computer does

sudo chkconfig postgresql- on

sudo -i -u postgres psql -c "CREATE EXTENSION citus;"

postgres=# \password postgres          #给postgres用户设置密码

Enter new password:

Enter it again: 

sudo -i -u postgres psql -c "SELECT * from master_add_node('192.168.99.101', 5432);"

sudo -i -u postgres psql -c "SELECT * from master_add_node('192.168.99.102', 5432);"

sudo -i -u postgres psql -c "SELECT * FROM master_get_active_worker_nodes();"

sudo -i -u postgres psql