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1、在所有节点执行以下步骤
Step 01 添加 Citus Repostory
# Add Citus repository for package manager
curl https://install.citusdata.com/community/rpm.sh | sudo bash
Step 02 安装 Citus 并且初始化 DB
# install PostgreSQL with Citus extension
sudo yum install -y citus72_10
# initialize system database (using RHEL 6 vs 7 method as necessary)
sudo service postgresql-10 initdb || sudo /usr/pgsql-10/bin/postgresql-10-setup initdb
# preload citus extension
echo “shared_preload_libraries = ‘citus'” | sudo tee -a /var/lib/pgsql/10/data/postgresql.conf
Step 03 配置 postgresql.conf
sudo vi /var/lib/pgsql/10/data/postgresql.conf
# Uncomment listen_addresses for the changes to take effect
listen_addresses = ‘*’
Step 04 配置 pg_hba.conf
sudo vi /var/lib/pgsql/10/data/pg_hba.conf
local all all peer
local replication all peer
host all all 192.168.99.1/24 trust
host all all 0.0.0.0/0 md5
Step 05 配置防火墙
查看
firewall-cmd –zone=public –query-port=5432/tcp
添加 5432 端口（–permanent 永久生效，没有此参数重启后失效）
firewall-cmd –zone=public –add-port=5432/tcp –permanent
重新载入
firewall-cmd –reload
Step 06 启动服务
# start the db server
sudo service postgresql-10 restart
# and make it start automatically when computer does
sudo chkconfig postgresql-10 on
Step 07 给需要的数据库安装 Citus 扩展
sudo -i -u postgres psql -c “CREATE EXTENSION citus;”
Step 08 设置密码
postgres=# \password postgres #给 postgres 用户设置密码
Enter new password:
Enter it again:
2、在 coordinator 节点额外执行以下步骤
Step 01 添加 worker 节点信息
添加 worker 节点的 IP 地址（或者 DNS 名称）和端口号到 pg_dist_node 表。
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);”
Step 02 验证安装是否成功
sudo -i -u postgres psql -c “SELECT * FROM master_get_active_worker_nodes();”
Step 03 开始使用
sudo -i -u postgres psql
参考资料：https://docs.citusdata.com/en/v7.2/installation/production_rhel.html
