Red Hat Training
A Red Hat training course is available for Red Hat Virtualization
Appendix E. Preparing a Local Manually-Configured PostgreSQL Database
You have the option of configuring a local PostgreSQL database on the Manager machine to use as the Manager database. By default, the Red Hat Virtualization Manager’s configuration script, engine-setup
, creates and configures the Manager database locally on the Manager machine. For automatic database configuration, see Section 2.3, “Configuring the Red Hat Virtualization Manager”.
To configure the Manager database on a machine that is separate from the machine where the Manager is installed, see Appendix D, Preparing a Remote PostgreSQL Database.
Use this procedure to set up the Manager database with custom values. Set up this database before you configure the Manager; you must supply the database credentials during engine-setup
. To set up the database, you must first install the rhvm
package on the Manager machine. The postgresql-server
package is installed as a dependency.
The engine-setup
and engine-backup --mode=restore
commands only support system error messages in the en_US.UTF8
locale, even if the system locale is different.
The locale settings in the postgresql.conf
file must be set to en_US.UTF8
.
The database name must contain only numbers, underscores, and lowercase letters.
Enabling the Red Hat Virtualization Manager Repositories
Register the system with Red Hat Subscription Manager, attach the Red Hat Enterprise Linux Server
and Red Hat Virtualization
subscriptions, and enable the Manager repositories.
Procedure
Register your system with the Content Delivery Network, entering your Customer Portal user name and password when prompted:
# subscription-manager register
Find the
Red Hat Enterprise Linux Server
andRed Hat Virtualization
subscription pools and record the pool IDs:# subscription-manager list --available
Use the pool IDs to attach the subscriptions to the system:
# subscription-manager attach --pool=pool_id
NoteTo view currently attached subscriptions:
# subscription-manager list --consumed
To list all enabled repositories:
# yum repolist
Configure the repositories:
# subscription-manager repos \ --disable='*' \ --enable=rhel-7-server-rpms \ --enable=rhel-7-server-supplementary-rpms \ --enable=rhel-7-server-rhv-4.2-manager-rpms \ --enable=rhel-7-server-rhv-4-manager-tools-rpms \ --enable=rhel-7-server-ansible-2.9-rpms \ --enable=jb-eap-7-for-rhel-7-server-rpms
Initializing the PostgreSQL Database
Install the PostgreSQL server package:
# yum install rh-postgresql95 rh-postgresql95-postgresql-contrib
Initialize the PostgreSQL database, start the
postgresql
service, and ensure that this service starts on boot:# scl enable rh-postgresql95 -- postgresql-setup --initdb # systemctl enable rh-postgresql95-postgresql # systemctl start rh-postgresql95-postgresql
Connect to the
psql
command line interface as thepostgres
user:su - postgres -c 'scl enable rh-postgresql95 -- psql'
Create a user for the Manager to use when it writes to and reads from the database. The default user name on the Manager is
engine
:postgres=# create role user_name with login encrypted password 'password';
Create a database in which to store data about the Red Hat Virtualization environment. The default database name on the Manager is
engine
:postgres=# create database database_name owner user_name template template0 encoding 'UTF8' lc_collate 'en_US.UTF-8' lc_ctype 'en_US.UTF-8';
Connect to the new database:
postgres=# \c database_name
Add the
uuid-ossp
extension:database_name=# CREATE EXTENSION "uuid-ossp";
Add the
plpgsql
language if it does not exist:database_name=# CREATE LANGUAGE plpgsql;
Ensure the database can be accessed remotely by enabling md5 client authentication. Edit the /var/opt/rh/rh-postgresql95/lib/pgsql/data/pg_hba.conf file, and add the following line immediately underneath the line starting with
local
at the bottom of the file, replacing ::0/32 or ::0/128 with the IP address of the Manager:host [database name] [user name] 0.0.0.0/0 md5 host [database name] [user name] ::/32 md5 host [database name] [user name] ::/128 md5
Update the PostgreSQL server’s configuration. Edit the /var/opt/rh/rh-postgresql95/lib/pgsql/data/postgresql.conf file and add the following lines:
autovacuum_vacuum_scale_factor='0.01' autovacuum_analyze_scale_factor='0.075' autovacuum_max_workers='6' maintenance_work_mem='65536' max_connections='150' work_mem='8192'
Restart the
postgresql
service:# systemctl rh-postgresql95-postgresql restart
Optionally, set up SSL to secure database connections using the instructions at http://www.postgresql.org/docs/9.5/static/ssl-tcp.html#SSL-FILE-USAGE.