forksand-it-manual/source/resources/apps/powa

PoWA for PostgreSQL

https://powa.readthedocs.io

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Install on PostgreSQL Servers

Using upstream postresql's repos, not Debian's repos.

apt install postgresql-10-powa postgresql-10-pg-qualstats postgresql-10-pg-stat-kcache postgresql-10-hypopg

Add permissions for PoWA node

Configure postgres:

vim /etc/postgresql/10/main/postgresql.conf

Change:

shared_preload_libraries to (keeping citus):

shared_preload_libraries='citus,pg_stat_statements,powa,pg_stat_kcache,pg_qualstats'

Enable:

track_io_timing = on

Create databases, run on each pg1 pg2 pg3 pg4 server:

psql CREATE DATABASE powa ; \c powa CREATE EXTENSION pg_stat_statements; CREATE EXTENSION btree_gist; CREATE EXTENSION powa; CREATE EXTENSION pg_qualstats; CREATE EXTENSION pg_stat_kcache; CREATE EXTENSION hypopg; CREATE ROLE powa SUPERUSER LOGIN PASSWORD 'password' ;

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Install on Web Node

Set up Debian Stretch node

Install postgres repos:

echo 'deb http://apt.postgresql.org/pub/repos/apt/ stretch-pgdg main' > /etc/apt/sources.list.d/pgdg.list wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add - apt update apt dist-upgrade apt install postgresql-client-10

There isn't a package of powa-web for Debian.

Install dependencies:

apt install python python-psycopg2 python-sqlalchemy python-tornado

wget -O powa-web-3.1.4.tar.gz https://github.com/powa-team/powa-web/archive/3.1.4.tar.gz tar -zxvf powa-web-3.1.4.tar.gz cd powa-web-3.1.4

cp ./powa-web.conf-dist ./powa-web.conf

cat > powa-web.conf <<EOF servers={ 'pg1': { 'host': '10.52.1.91', 'port': '5432', 'database': 'powa', 'query': {'client_encoding': 'utf8'} }, 'pg2': { 'host': '10.52.1.92', 'port': '5432', 'database': 'powa', 'query': {'client_encoding': 'utf8'} }, 'pg3': { 'host': '10.52.1.93', 'port': '5432', 'database': 'powa', 'query': {'client_encoding': 'utf8'} }, 'pg4': { 'host': '10.52.1.94', 'port': '5432', 'database': 'powa', 'query': {'client_encoding': 'utf8'} } } cookie_secret="password" EOF

./powa-web

XXX setup user, startup scripts, etc.

From git version: XXX fail:

Unable to connect: powa-archivist version 3.1.X does not match powa-web version 3.2.X

git clone https://github.com/powa-team/powa-web

Last version from git to work with 3.1.X:

cd powa-web git checkout a14a85b3b29ae1d68c20e7394e4214d318a948f3 ./powa-web

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Admin Web Client

On workstation create tunnel:

ssh -N -C -L 58888:localhost:8888 powa

On workstation, in browser, login user 'powa' with powa's postgres password.

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