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ex1-sentry.md

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Why Sentry ?

Sentry is a nice way to look at logs, be notified of errors and to prioritize solving issues.

Setting up a local sentry instance

We will use a docker compose template that will setup a basic sentry instance that Galaxy can connect to.

We first have to install docker-compose:

sudo apt-get install docker-compose

We clone the template repository as the ubuntu user:

git clone https://github.com/getsentry/onpremise
cd onpremise/

We need to generate a secret key:

sudo docker-compose run web config generate-secret-key

We need to add the output of this command to docker-compose.yml, so that the environment section looks like this:

...
    environment:
      # Run `docker-compose run web config generate-secret-key`
      # to get the SENTRY_SECRET_KEY value.
      SENTRY_SECRET_KEY: '<secret key we generated in the last command>'
      SENTRY_MEMCACHED_HOST: memcached
...

We have to create the persistent directories:

mkdir -p data/{sentry,postgres}

We have to do some database migrations:

sudo docker-compose run --rm web upgrade

Now we can start the sentry instance, which should be available at http://localhost:9000/

sudo docker-compose up -d

To connect to the instance we have to tunnel port 9000. On your laptop do:

ssh -L 9000:127.0.0.1:9000 ubuntu@<your_ip_addresses>

If you are using putty you need to forward port 9000 there.

Go with your browser to http://localhost:9000/ you will have to enter a few details. The root URL is http://localhost:9000/.

Connecting sentry with Galaxy

We need to create a new project in sentry. Click on "New Project" and enter "Galaxy" as Project name.

Then click on "Get your DSN" and copy the long string.

We need to add this to the galaxy config (sudo -u galaxy -e /srv/galaxy/config/galaxy.ini), as sentry_dsn = <our_dsn>.

Using sentry requires a conditional python dependency, which we can install with

sudo -Hsu galaxy
cd /srv/galaxy/server
GALAXY_VIRTUAL_ENV=/srv/galaxy/venv GALAXY_CONFIG_FILE=/srv/galaxy/config/galaxy.ini source scripts/common_startup.sh

Now restart Galaxy (sudo supervisorctl restart galaxy:) and observe the incoming logs in your Sentry Project!