Awesome

Uptime Checker

Check if your sites are online for $7/mo.

Configuration

1. Fork this repository. Make sure you hit the "Watch" button on this Github repository, so you can see when you have to update your own fork.
2. Create a branch from master.
3. Create the checkers.yml file with all your checkers and commit your changes.
4. To keep up with master, switch to master and run git pull. Then switch to your branch and run git rebase master. This assumes you didn't touch any of the files, so you won't have any merging issues.

Environment variables

You can configure some options; just define the following environment variables.

• LOCALE: the locale. Defaults to en. Check available languages at https://github.com/fnando/uptime_checker/tree/master/lib/uptime_checker/locales
• TIMEZONE: the timezone. Defaults to Etc/UTC.
• INTERVAL: the number of seconds between each verification. Defaults to 30.
• UPTIME_CHECKER_STORE: the store type you're going to use. Can be database or redis. Defaults to redis. If you choose database, make sure DATABASE_URL is defined.

Defining your checkers

You only have to create a checkers.yml file containing all your checkers. Here's an example:

# these are the default notifications
notify: &notify
  - stdout: ~
  - email: john@example.com
  - slack: "#core"
  - telegram: 12345678
  - hipchat: 456789
  - twitter: johndoe

checkers:
  - name: My Site
    url: http://example.com
    notify: *notify
    status: 200

  - name: Other site
    url: http://sub.example.com
    notify: *notify
    status: 200
    body: My Other Site

You can configure the file location by setting the CONFIG_FILE environment variable.

Notice that you can have multiple notifications for the same notifier. Say you also want to send e-mail notification to jane@example.com.

# these are the default notifications
notify: &notify
  - email: john@example.com
  - email: jane@example.com

# ...

For more information about the notifiers, keep reading this README.

Failures threshold

You can set the minimum number of failures before triggering the notification. By default you'll be notified every time a check fails.

The following example will send notifications only when check fails three times.

checkers:
  - name: My Site
    url: http://example.com
    notify: *notify
    min_failures: 3

Deployment

Deploying to a VPS

You can deploy uptime_checker to a VPS. If you know how to deploy a Rails application, you won't have any issues deploying uptime_checker.

If you don't, instructions to come. Use Heroku in the meantime.

Deploying to Heroku

First, clone this repository.

git clone https://github.com/fnando/uptime_checker.git

Create a new branch. This is required so that you can create your configuration file.

git checkout -b mybranch

Copy the configuration file and commit it.

cp checkers.yml.sample checkers.yml

Change the configuration file and commit it.

git add .
git commit -a -m "Adding configuration."

Now, configure Heroku. Create a new app for this.

heroku create

Now you have to choose your state store type. You may use Redis or PostgreSQL.

For Redis, use the following command:

heroku addons:create heroku-redis

For PostgreSQL, use the following command:

heroku addons:create heroku-postgresql

If you're going to send e-mail notification, you'll need Sendgrid as well.

heroku addons:create sendgrid:starter

Time to deploy:

git push heroku mybranch:master

If you're using PostgreSQL, also run heroku run 'bundle exec sequel -m migrations $DATABASE_URL'.

Scale up the uptime checker worker:

heroku ps:scale worker=1

To make your worker run 24/7 (will cost you $7/month):

heroku dyno:type worker=hobby

To upgrade your branch to the latest version you have to fetch master's changes and rebase onto mybranch.

git checkout master
git pull
git checkout mybranch
git rebase master

After doing the upgrade, deploy it with git push heroku mybranch:master -f.

Notifiers

Telegram

1. Create a bot. The returned API token must be defined as TELEGRAM_API_TOKEN environment variable.
2. Create a new group.
3. Add bot to the group you just created.
4. Go to @BotFather and /setprivacy to enabled. You also have to /setjoingroups to disabled.
5. Go to the group you created and send a message to the bot; use something like @YouBotName hello.
6. Run ruby setup/telegram.rb locally to get the channel id. You may need to install the dependencies with bundle install before doing it so.
7. Set the notification as telegram: <chat id>. Sometimes id can be a negative number and this is important.

Example:

# these are the default notifications
notify: &notify
  - telegram: 12345

checkers:
  - name: My Site
    url: http://example.com
    notify: *notify
    status: 200

E-mail

Note: Currently only SendGrid is supported.

1. Set your username as SENDGRID_USERNAME environment variable.
2. Set your password as SENDGRID_PASSWORD environment variable.
3. Set the notification as email: <email address>.

Example:

# these are the default notifications
notify: &notify
  - email: john@example.com

checkers:
  - name: My Site
    url: http://example.com
    notify: *notify
    status: 200

Twitter

1. Create an user for your bot.
2. Follow your bot, and make your bot follow you.
3. Create a new Twitter application under your bot's account at https://apps.twitter.com/app/new
4. Go to "Keys and Access Tokens" and create a new access token.
5. Set TWITTER_CONSUMER_KEY, TWITTER_CONSUMER_SECRET, TWITTER_ACCESS_TOKEN and TWITTER_ACCESS_SECRET environment variables, all available under "Keys and Access Token".
6. Set the notification as twitter: <username>.

Example:

# these are the default notifications
notify: &notify
  - twitter: johndoe

checkers:
  - name: My Site
    url: http://example.com
    notify: *notify
    status: 200

Slack

1. Create a new bot user at https://my.slack.com/services/new/bot
2. Set the API token as the SLACK_API_TOKEN environment variable.
3. Set the channel name as slack: "#channel".

# these are the default notifications
notify: &notify
  - slack: "#core"

checkers:
  - name: My Site
    url: http://example.com
    notify: *notify
    status: 200

Campfire

1. Create a new bot user.
2. Logged in as the bot user, go to https://<your subdomain>.campfirenow.com/member/edit to get the API token, that must be set as CAMPFIRE_API_TOKEN, together with the CAMPFIRE_SUBDOMAIN.
3. Set the notification as campfire: <room id>.

# these are the default notifications
notify: &notify
  - campfire: 123456

checkers:
  - name: My Site
    url: http://example.com
    notify: *notify
    status: 200

Pushover

To be notified through iOS/Android push notifications, you can use Pushover ($5 for a lifetime license). You can also buy a lifetime license for desktop notifications.

1. Create a new application at https://pushover.net/apps/build
2. Set the API token as the PUSHOVER_APPLICATION_TOKEN environment variable.
3. Set the notification as pushover: <user token>.

To avoid committing your user token, you can set it as an environment variable (e.g. PUSHOVER_JOHN), and then use eRb code like the following:

# these are the default notifications
notify: &notify
  - pushover: <%= ENV["PUSHOVER_JOHN"] %>

checkers:
  - name: My Site
    url: http://example.com
    notify: *notify
    status: 200