76 lines
3.9 KiB
Markdown
76 lines
3.9 KiB
Markdown
# Slack Notifications Service
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The Slack Notifications Service allows your GitLab project to send events (e.g. issue created) to your existing Slack team as notifications. This requires configurations in both Slack and GitLab.
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> Note: You can also use Slack slash commands to control GitLab inside Slack. This is the separately configured [Slack slash commands](slack_slash_commands.md).
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## Slack Configuration
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1. Sign in to your Slack team and [start a new Incoming WebHooks configuration](https://my.slack.com/services/new/incoming-webhook).
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1. Select the Slack channel where notifications will be sent to by default. Click the **Add Incoming WebHooks integration** button to add the configuration.
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1. Copy the **Webhook URL**, which we'll use later in the GitLab configuration.
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## GitLab Configuration
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1. Navigate to the [Integrations page](project_services.md#accessing-the-project-services) in your project's settings, i.e. **Project > Settings > Integrations**.
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1. Select the **Slack notifications** project service to configure it.
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1. Check the **Active** checkbox to turn on the service.
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1. Check the checkboxes corresponding to the GitLab events you want to send to Slack as a notification.
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1. For each event, optionally enter the Slack channel where you want to send the event. (Do _not_ include the `#` symbol.) If left empty, the event will be sent to the default channel that you configured in the Slack Configuration step.
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1. Paste the **Webhook URL** that you copied from the Slack Configuration step.
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1. Optionally customize the Slack bot username that will be sending the notifications.
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1. Configure the remaining options and click `Save changes`.
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Your Slack team will now start receiving GitLab event notifications as configured.
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## Troubleshooting
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If you're having trouble with the Slack integration not working, then start by
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searching through the [Sidekiq logs](../../../administration/logs.md#sidekiqlog)
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for errors relating to your Slack service.
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### Something went wrong on our end
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This is a generic error shown in the GitLab UI and doesn't mean much by itself.
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You'll need to look in [the logs](../../../administration/logs.md#productionlog) to find
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an error message and keep troubleshooting from there.
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### `certificate verify failed`
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You may see an entry similar to the following in your Sidekiq log:
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```text
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2019-01-10_13:22:08.42572 2019-01-10T13:22:08.425Z 6877 TID-abcdefg ProjectServiceWorker JID-3bade5fb3dd47a85db6d78c5 ERROR: {:class=>"ProjectServiceWorker", :service_class=>"SlackService", :message=>"SSL_connect returned=1 errno=0 state=error: certificate verify failed"}
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```
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This is probably a problem either with GitLab communicating with Slack, or GitLab
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communicating with itself. The former is less likely since Slack's security certificates
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should _hopefully_ always be trusted. We can establish which we're dealing with by using
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the below rails console script.
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```sh
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# start a rails console:
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sudo gitlab-rails console production
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# or for source installs:
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bundle exec rails console production
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```
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```ruby
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# run this in the Rails console
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# replace <SLACK URL> with your actual Slack URL
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result = Net::HTTP.get(URI('https://<SLACK URL>'));0
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# replace <GITLAB URL> with your actual GitLab URL
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result = Net::HTTP.get(URI('https://<GITLAB URL>'));0
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```
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If it's an issue with GitLab not trusting HTTPS connections to itself, then you may simply
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need to [add your certificate to GitLab's trusted certificates](https://docs.gitlab.com/omnibus/settings/ssl.html#install-custom-public-certificates).
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If it's an issue with GitLab not trusting connections to Slack, then the GitLab
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OpenSSL trust store probably got messed up somehow. Typically this is from overriding
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the trust store with `gitlab_rails['env'] = {"SSL_CERT_FILE" => "/path/to/file.pem"}`
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or by accidentally modifying the default CA bundle `/opt/gitlab/embedded/ssl/certs/cacert.pem`.
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