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Set up benchmark_app on Linux server

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piotr-iohk edited this page Feb 10, 2023 · 6 revisions

This guide describes how to set up benchmark up on Linux server from scratch.

Install ruby

Install Postgres

sudo apt update
sudo apt install postgresql postgresql-contrib libpq-dev
sudo systemctl start postgresql.service

Set up database

  • Create user
$ sudo -i -u postgres
postgres@ip-xxx-xx-xx-xxx:~$ createuser --interactive
Enter name of role to add: benchmark
Shall the new role be a superuser? (y/n) y
postgres@ip-xxx-xx-xx-xxx:~$ exit

$ sudo adduser benchmark
  • Set DB user password
$ sudo -i -u postgres
$ psql
postgres=# ALTER USER benchmark PASSWORD 'yourverysecurepassword';
ALTER ROLE
postgres=# \q
  • Create database

ℹ️ User benchmark will automatically connect to the database named benchmark.

sudo -u postgres createdb benchmark

Set up env variables

You can put this in your ~/.bashrc.

export BUILDKITE_API_TOKEN=<get it from buildkite>
export APP_ENV=production
export BENCH_DB_PATH=postgres://benchmark:yourverysecurepassword@localhost/benchmark

Start benchmark_app

  • Checkout
mkdir apps
cd apps
git clone https:/piotr-iohk/benchmark_app.git
  • Configure ruby version and dependencies
cd benchmark_app
rbenv local 2.7.1
bundle install
  • Migrate database (a.k.a. create tables)
rake db:migrate
  • Get latest Buildkite results
rake bk:latest
  • Start benchmark app in a screen session
$ screen -dmS benchmark_app ./start
$ screen -ls
There is a screen on:
	49267.benchmark_app	(02/09/23 15:48:34)	(Detached)

ℹ️ To attach to the session:

$ screen -r benchmark_app

To detach: Ctrl + a and then d.

⚠️ Note! The application by default will start on port 5555. Therefore it is required to open this port on the server such that one can access it as http://<host>:5555. Alternatively it can be probably configured with some webserver as nginx.

Et voilà! http://ec2-18-156-193-207.eu-central-1.compute.amazonaws.com:5555/

Set up cron job

We want Buildkite results to be migrated repeatedly. For that we will set up a cron job.

  • Edit crontab 
crontab -e
  • Add job
SHELL=/bin/bash
BASH_ENV=~/.bashrc
BENCH_DB_PATH=postgres://benchmark:yourverysecurepassword@localhost/benchmark 
BUILDKITE_API_TOKEN=<get it from buildkite>

*/10 * * * * cd ~/apps/benchmark_app && ~/.rbenv/versions/2.7.1/bin/rake bk:latest
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