Server Configuration

Healthchecks prepares its configuration in hc/settings.py. It reads configuration from environment variables. Below is a list of variables it reads and uses.

ADMINS

Default: "" (empty string)

A comma-sepparated list of email addresses to send code error notifications to. When DEBUG=False, Healthchecks will send the details of exceptions raised in the request/response cycle to the listed addresses. Example:

ADMINS=alice@example.org,bob@example.org

Note: for error notifications to work, make sure you have also specified working SMTP credentials in the EMAIL_... environment variables.

ALLOWED_HOSTS

Default: *

The host/domain names that this site can serve. You can specify multiple domain names by separating them with commas:

ALLOWED_HOSTS=my-hc.example.org,alternative-name.example.org

Apart from the comma-separated syntax, this is a standard Django setting. Read more about it in the Django documentation.

APPRISE_ENABLED

Default: False

A boolean that turns on/off the Apprise integration.

Before enabling the Apprise integration, make sure the apprise package is installed:

pip install apprise

DB

Default: sqlite

The database engine to use. Possible values: sqlite, postgres, mysql.

DB_CONN_MAX_AGE

Default: 0

This is a standard Django setting, read more in Django documentation.

DB_HOST

Default: "" (empty string)

This is a standard Django setting, read more in Django documentation.

DB_NAME

Default: hc (PostgreSQL, MySQL) or /path/to/projectdir/hc.sqlite (SQLite)

This is a standard Django setting, read more in Django documentation.

DB_PASSWORD

Default: "" (empty string)

This is a standard Django setting, read more in Django documentation.

DB_PORT

Default: "" (empty string)

This is a standard Django setting, read more in Django documentation.

DB_SSLMODE

Default: prefer

PostgreSQL-specific, details

DB_TARGET_SESSION_ATTRS

Default: read-write

PostgreSQL-specific, details

DB_USER

Default: postgres (PostgreSQL) or root (MySQL)

This is a standard Django setting, read more in Django documentation.

DEBUG

Default: True

A boolean that turns on/off debug mode.

Never run a Healthchecks instance in production with the debug mode turned on!

This is a standard Django setting, read more in Django documentation.

DEFAULT_FROM_EMAIL

Default: healthchecks@example.org

This is a standard Django setting, read more in Django documentation.

DISCORD_CLIENT_ID

Default: None

The Discord Client ID, required by the Discord integration.

To set up the Discord integration:

  • Register a new application at https://discordapp.com/developers/applications/me
  • Add a Redirect URI to your Discord application. The URI format is SITE_ROOT/integrations/add_discord/. For example, if your SITE_ROOT is https://my-hc.example.org then the Redirect URI would be https://my-hc.example.org/integrations/add_discord/
  • Look up your Discord app's Client ID and Client Secret. Put them in the DISCORD_CLIENT_ID and DISCORD_CLIENT_SECRET environment variables.

DISCORD_CLIENT_SECRET

Default: None

The Discord Client Secret, required by the Discord integration. Look it up at https://discordapp.com/developers/applications/me.

EMAIL_HOST

Default: "" (empty string)

This is a standard Django setting, read more in Django documentation.

EMAIL_HOST_PASSWORD

Default: "" (empty string)

This is a standard Django setting, read more in Django documentation.

EMAIL_HOST_USER

Default: "" (empty string)

This is a standard Django setting, read more in Django documentation.

EMAIL_PORT

Default: 587

This is a standard Django setting, read more in Django documentation.

EMAIL_USE_TLS

Default: True

This is a standard Django setting, read more in Django documentation.

EMAIL_USE_SSL

Default: False

This is a standard Django setting, read more in Django documentation.

EMAIL_USE_VERIFICATION

Default: True

A boolean that turns on/off a verification step when adding an email integration.

If enabled, whenever a user adds an email integration, Healthchecks emails a verification link to the new address. The new integration becomes active only after the user clicks the verification link.

If you are setting up a private healthchecks instance where you trust your users, you can opt to disable the verification step. In that case, set EMAIL_USE_VERIFICATION to False.

http_proxy and https_proxy

Default: "" (empty string)

Specifies the proxy server to use for outgoing HTTP and HTTPS requests. Supports different proxy server types. Examples:

https_proxy=http://example.org:1234
https_proxy=https://example.org:1234
https_proxy=socks4://example.org:1234
https_proxy=socks5://example.org:1234

Healthchecks uses libcurl as the HTTP client library for making HTTP(S) requests. For more information about the proxy functionality, please see libcurl documentation.

Note: If your proxy server has a private IP address, you will also need to set the INTEGRATIONS_ALLOW_PRIVATE_IPS setting to True to use it.

INTEGRATIONS_ALLOW_PRIVATE_IPS

Default: False

A boolean that controls whether the integrations are allowed to make HTTP(S) requests to private IP addresses (127.0.0.1, 192.168.x.x, ...). This setting is set to False by default, because allowing users to define webhooks that probe internal addresses is a security risk.

Only enable this setting if you run your Healthchecks instance in a trusted environment, and need to integrate with services running in your internal network.

This setting affects all integration types, not just webhooks. For example, if you run a Gotify instance on localhost, you will need to enable INTEGRATIONS_ALLOW_PRIVATE_IPS to be able to use it via the Gotify integration.

This setting affects all outbound HTTP requests, including those made while setting up new integrations (e.g. during the OAuth2 authorization flow).

This setting also affects connections to the proxy server when the http_proxy or https_proxy environment variables are set. If your proxy server has a private IP address, you will need to enable INTEGRATIONS_ALLOW_PRIVATE_IPS to use it.

LINENOTIFY_CLIENT_ID

Default: None

LINENOTIFY_CLIENT_SECRET

Default: None

MASTER_BADGE_LABEL

Default: same as SITE_NAME

The label for the "Overall Status" status badge.

MATRIX_ACCESS_TOKEN

Default: None

The Matrix bot user's access token, required by the Matrix integration.

To set up the Matrix integration:

  • Register a bot user (for posting notifications) in your preferred Matrix homeserver.
  • Use the Login API call to retrieve bot user's access token. You can run it as shown in the documentation, using curl in the command shell.
  • Set the MATRIX_ environment variables. Example:
MATRIX_ACCESS_TOKEN=[a long string of characters returned by the login call]
MATRIX_HOMESERVER=https://matrix.org
MATRIX_USER_ID=@mychecks:matrix.org

MATRIX_HOMESERVER

Default: None

The Matrix bot's homeserver address, required by the Matrix integration.

MATRIX_USER_ID

Default: None

The Matrix bot's user identifier, required by the Matrix integration.

MATTERMOST_ENABLED

Default: True

A boolean that turns on/off the Mattermost integration. Enabled by default.

MSTEAMS_ENABLED

Default: True

A boolean that turns on/off the MS Teams integration. Enabled by default.

OPSGENIE_ENABLED

Default: True

A boolean that turns on/off the Opsgenie integration. Enabled by default.

PAGERTREE_ENABLED

Default: True

A boolean that turns on/off the PagerTree integration. Enabled by default.

PD_APP_ID

Default: None

PagerDuty application ID. If set, enables the PagerDuty Simple Install Flow. If None, Healthchecks will fall back to the even simpler flow where users manually copy integration keys from PagerDuty and paste them in Healthchecks.

To set up:

  • Register a PagerDuty app at PagerDuty › Developer Mode › My Apps
  • In the newly created app, add the "Events Integration" functionality
  • Specify a Redirect URL: https://your-domain.com/integrations/add_pagerduty/
  • Copy the displayed app_id value (PXXXXX) and put it in the PD_APP_ID environment variable

PD_ENABLED

Default: True

A boolean that turns on/off the PagerDuty integration. Enabled by default.

PING_BODY_LIMIT

Default: 10000

The upper size limit in bytes for logged ping request bodies. The default value is 10000 (10 kilobytes). You can adjust the limit or you can remove it altogether by setting this value to None.

PING_EMAIL_DOMAIN

Default: localhost

The domain to use for generating ping email addresses. Example:

PING_EMAIL_DOMAIN=ping.my-hc.example.org

In this example, Healthchecks would generate ping email addresses similar to 3f1a7317-8e96-437c-a17d-b0d550b51e86@ping.my-hc.example.org.

PING_ENDPOINT

Default: SITE_ROOT + /ping/

The base URL to use for constructing ping URLs for display. Healthchecks constructs ping URLs by appending either an UUID value or <ping-key>/<slug> value to PING_ENDPOINT.

Notes:

  • Make sure the PING_ENDPOINT value ends with a trailing slash. If a trailing slash is missing, Healthchecks will not add it implicitly.
  • Healthchecks uses PING_ENDPOINT for formatting ping URLs for display. The PING_ENDPOINT value does not influence the routing of incoming HTTP requests. If you change the PING_ENDPOINT value, you will likely also need to add matching URL rewriting rules in your reverse proxy configuration.

Example:

PING_ENDPOINT=https://ping.my-hc.example.org/

With this setting, Healthchecks will generate ping URLs similar to:

https://ping.my-hc.example.org/3f1a7317-8e96-437c-a17d-b0d550b51e86
https://ping.my-hc.example.org/1fj9XWM6Ns8vLGTmnPGk9g/dummy-slug

PROMETHEUS_ENABLED

Default: True

A boolean that turns on/off the Prometheus integration. Enabled by default.

PUSHBULLET_CLIENT_ID

Default: None

The Pushbullet Client ID, required by the Pushbullet integration.

To set up the Pushbullet integration:

  • Add a new OAuth client at https://www.pushbullet.com/#settings/clients
  • Add a redirect_uri to your OAuth client. The URI format is SITE_ROOT/integrations/add_pushbullet/. For example, if your SITE_ROOT is https://my-hc.example.org then the redirect_uri would be https://my-hc.example.org/integrations/add_pushbullet/
  • Look up your OAuth client's client_id and client_secret values. Put them in the PUSHBULLET_CLIENT_ID and PUSHBULLET_CLIENT_SECRET environment variables.

Read more about setting up a Pushbullet OAuth client in the Pushbullet OAuth2 guide.

PUSHBULLET_CLIENT_SECRET

Default: None

The Pushbullet Client Secret, required by the Pushbullet integration. Look it up at https://www.pushbullet.com/#settings/clients.

PUSHOVER_API_TOKEN

Default: None

The Pushover API token, required by the Pushover integration.

To enable the Pushover integration:

  • Register a new Pushover application at https://pushover.net/apps/build.
  • Within the Pushover application configuration, enable subscriptions. Make sure the subscription type is set to "URL". Also make sure the redirect URL is configured to point back to the root of the Healthchecks instance (e.g., https://my-hc.example.org/).
  • Put the Pushover application's API Token and the Subscription URL in PUSHOVER_API_TOKEN and PUSHOVER_SUBSCRIPTION_URL environment variables. The Pushover subscription URL should look similar to https://pushover.net/subscribe/yourAppName-randomAlphaNumericData.

PUSHOVER_EMERGENCY_EXPIRATION

Default: 86400 (24 hours)

Specifies how many seconds an emergency Pushover notification will continue to be retried for.

More information in Pushover API documentation.

PUSHOVER_EMERGENCY_RETRY_DELAY

Default: 300 (5 minutes)

Specifies how often (in seconds) the Pushover servers will send the same notification to the user.

More information in Pushover API documentation.

PUSHOVER_SUBSCRIPTION_URL

Default: None

The Pushover Subscription URL, required by the Pushover integration.

REGISTRATION_OPEN

Default: True

A boolean that controls whether site visitors can create new accounts. Set it to False if you are setting up a private Healthchecks instance, but it needs to be publicly accessible (so, for example, your cloud services can send pings to it).

If you close new user registration, you can still selectively invite users to your team account.

REMOTE_USER_HEADER

Default: None

Specifies the request header to use for external authentication. If you use a reverse proxy that handles user authentication, and the reverse proxy can pass the authenticated user's email address in an HTTP request header, you can use this setting to integrate Healthchecks with it.

When REMOTE_USER_HEADER is set, Healthchecks will:

  • in views that require authentication, look up the request header specified in REMOTE_USER_HEADER
  • assume the header contains the user's email address
  • automatically log in the user with a matching email address
  • automatically create a user account if it does not exist
  • disable the default authentication methods (login link to email, password)

The header name in REMOTE_USER_HEADER must be specified in upper-case, with any dashes replaced with underscores, and prefixed with HTTP_. For example, if your authentication proxy sets a X-Authenticated-User request header, you should set REMOTE_USER_HEADER=HTTP_X_AUTHENTICATED_USER.

Important: When this option is enabled, Healthchecks will trust the header's value implicitly, so it is very important to ensure that attackers cannot set the value themselves (and thus impersonate any user). How to do this varies by your chosen proxy, but generally involves configuring it to strip out headers that normalize to the same name as the chosen identity header.

ROCKETCHAT_ENABLED

Default: True

A boolean that turns on/off the Rocket.Chat integration. Enabled by default.

RP_ID

Default: None

The Relying Party identifier, required by the WebAuthn second-factor authentication feature.

Healthchecks optionally supports two-factor authentication using the WebAuthn standard. To enable WebAuthn support, set the RP_ID setting to a non-null value. Set its value to your site's domain without scheme and without port. For example, if your site runs on https://my-hc.example.org, set RP_ID to my-hc.example.org.

Note that WebAuthn requires HTTPS, even if running on localhost. To test WebAuthn locally with a self-signed certificate, you can use the runsslserver command from the django-sslserver package.

S3_ACCESS_KEY

Default: None

Access key of an account in S3 service.

Healthchecks can optionally upload ping request body data to S3-compatible object storage instead of storing it in the database. To use this feature, provide valid credentials to an S3-compatible service by setting the following environment variables:

  • S3_ACCESS_KEY (example: AKIAFIXMEFIXME)
  • S3_BUCKET (example: my-bucket)
  • S3_ENDPOINT (example: s3.eu-central-1.amazonaws.com)
  • S3_REGION (example: eu-central-1)
  • S3_SECRET_KEY

S3_BUCKET

Default: None

Name of the bucket in S3 service for storing ping request body data.

S3_ENDPOINT

Default: None

URL to the S3-compatible service.

S3_REGION

Default: None

Region name of buckets in S3 service.

S3_SECRET_KEY

Default: None

The secret key of an account in S3 service.

S3_TIMEOUT

Default: 60

Timeout for individual S3 operations, in seconds.

S3_SECURE

Default: True

Whether to use secure (TLS) connection to S3 or not. To use unencrypted HTTP requests, set this value to False.

SECRET_KEY

Default: ---

A secret key used for cryptographic signing. Should be set to a unique, unpredictable value.

This is a standard Django setting, read more in Django documentation.

SHELL_ENABLED

Default: False

A boolean that turns on/off the "Shell Commands" integration.

The "Shell Commands" integration runs user-defined local shell commands when checks go up or down. This integration is disabled by default and can be enabled by setting the SHELL_ENABLED environment variable to True.

Note: be careful when using "Shell Commands" integration, and only enable it when you fully trust the users of your Healthchecks instance. The commands will be executed by the manage.py sendalerts process and will run with its system permissions.

SIGNAL_CLI_SOCKET

Default: None

The path to the signal-cli UNIX socket, or the hostname:port of the signal-cli TCP socket.

Example (UNIX socket):

SIGNAL_CLI_SOCKET=/tmp/signal-cli.socket

Example (TCP socket):

SIGNAL_CLI_SOCKET=example.org:7583

Healthchecks uses signal-cli to send Signal notifications. Healthcecks interacts with signal-cli over UNIX or TCP socket (requires signal-cli 0.10.0 or later).

To enable the Signal integration:

  • Set up and configure signal-cli to expose JSON RPC on an UNIX or TCP socket (instructions). Example: signal-cli -a +xxxxxx daemon --socket /tmp/signal-cli-socket
  • Put the socket's location in the SIGNAL_CLI_SOCKET environment variable.

SITE_LOGO_URL

Default: None

An URL pointing to the image you want to use as the site logo. If not set, Healthchecks will use a fallback image: /static/img/logo.png.

You can place a custom logo in /static/img/, run manage.py collectstatic, and point SITE_LOGO_URL to it like so:

SITE_LOGO_URL=/static/img/my-custom-logo.png

Or you can serve the logo from another server, and point to it using an absolute URL:

SITE_LOGO_URL=https://example.org/cdn/my-custom-logo.png

Either way, Healthchecks will use the provided SITE_LOGO_URL value as-is in HTML pages, and you should use an URL that the end user's browser will be able to access directly. The logo image can use any image format supported by browsers (PNG, SVG, JPG are all fine).

Docker note. You can build a custom Docker image with your logo "baked in". To do so, use a Dockerfile with the following contents, and with your logo.png placed next to it:

FROM healthchecks/healthchecks
COPY logo.png /opt/healthchecks/static-collected/img/

This overwrites the default placeholder logo, so, in this case, you do not need to specify SITE_LOGO_URL. Notice that the logo must be placed in static-collected, not static. This is because manage.py collectstatic has already been run in the base image's build time, and the web server will not recognize any new files placed in the static directory.

Please do not use the Healthchecks.io logo (the one with the dark green background) on self-hosted instances. This logo is not part of the Healthchecks open-source project.

SITE_NAME

Default: Mychecks

The display name of this Healthchecks instance. Healthchecks uses it throughout its web UI and documentation.

SITE_ROOT

Default: http://localhost:8000

The base URL of this Healthchecks instance. Healthchecks uses SITE_ROOT whenever it needs to construct absolute URLs.

SLACK_CLIENT_ID

Default: None

The Slack Client ID, used by the Healthchecks integration for Slack.

The integration can work with or without the Slack Client ID. If the Slack Client ID is not set, in the "Integrations - Add Slack" page, Healthchecks will ask the user to provide a webhook URL for posting notifications.

If the Slack Client ID is set, Healthchecks will use the OAuth2 flow to get the webhook URL from Slack. The OAuth2 flow is more user-friendly. To set it up, go to https://api.slack.com/apps/ and create a Slack app. When setting up the Slack app, make sure to:

  • Add the incoming-webhook scope to the Bot Token Scopes.
  • Add a Redirect URL in the format SITE_ROOT/integrations/add_slack_btn/. For example, if your SITE_ROOT is https://my-hc.example.org then the Redirect URL would be https://my-hc.example.org/integrations/add_slack_btn/.

SLACK_CLIENT_SECRET

Default: None

The Slack Client Secret. Required if SLACK_CLIENT_ID is set. Look it up at https://api.slack.com/apps/.

SLACK_ENABLED

Default: True

A boolean that turns on/off the Healthchecks integration for Slack. Enabled by default.

SPIKE_ENABLED

Default: True

A boolean that turns on/off the Spike.sh integration. Enabled by default.

TELEGRAM_BOT_NAME

Default: ExampleBot

The Telegram bot name, required by the Telegram integration.

To set up the Telegram integration:

  • Create a Telegram bot by talking to the BotFather. Set the bot's name, description, user picture, and add a "/start" command.
  • After creating the bot you will have the bot's name and token. Put them in TELEGRAM_BOT_NAME and TELEGRAM_TOKEN environment variables.
  • Run the settelegramwebhook management command. This command tells Telegram where to forward channel messages by invoking Telegram's setWebhook API call:
$ ./manage.py settelegramwebhook
Done, Telegram's webhook set to: https://my-monitoring-project.com/integrations/telegram/bot/

For this to work, your SITE_ROOT must be publicly accessible and use the "https://" scheme.

TELEGRAM_TOKEN

Default: None

The Telegram bot user's authentication token, required by the Telegram integration.

TRELLO_APP_KEY

Default: None

The Trello app key, required by the Trello integration.

To set up the Trello integration, get a developer API key from https://trello.com/app-key and put it in the TRELLO_APP_KEY environment variable.

TWILIO_ACCOUNT

Default: None

Twilio Account SID, required by the SMS, Call, and WhatsApp integrations.

TWILIO_AUTH

Default: None

Twilio Auth token, required by the SMS, Call, and WhatsApp integrations.

TWILIO_FROM

Default: None

The Twilio phone number to use as the sender for SMS and WhatsApp notifications, and as the caller for Call integrations.

Example:

TWILIO_FROM=+15017122661

TWILIO_MESSAGING_SERVICE_SID

Default: None

The Twilio Messaging Service SID for sending SMS and WhatsApp notifications.

TWILIO_MESSAGING_SERVICE_SID is required for sending WhatsApp notifications.

TWILIO_MESSAGING_SERVICE_SID is optional for sending SMS notifications. If specified, Healthchecks will pass it in the "MessagingServiceSid" field to Twilio API. This will result in Twilio using a Messaging Service instead of a plain sender number to deliver the SMS messages. If not specified, Healthchecks will fall back to using the "From" field with the value configured in TWILIO_FROM.

Example:

TWILIO_MESSAGING_SERVICE_SID=MGe56e622d540e6badc52ae0ac4af028c6

TWILIO_USE_WHATSAPP

Default: False

A boolean that turns on/off the WhatsApp integration. For the WhatsApp integration to work, you will also need to specify:

USE_PAYMENTS

Default: False

A boolean that turns on/off billing features.

VICTOROPS_ENABLED

Default: True

A boolean that turns on/off the Splunk On-Call (VictorOps) integration. Enabled by default.

WEBHOOKS_ENABLED

Default: True

A boolean that turns on/off the Webhooks integration. Enabled by default.

WHATSAPP_DOWN_CONTENT_SID

Default: None

Identifier of the Twilio content template to use for WhatsApp "down" notifications. Required by the WhatsApp integration.

Meta requires WhatsApp message templates to be pre-registered and approved. Create a content template in your Twilio account with the following contents:

The check “{{1}}” is DOWN.

You can tweak the message contents as needed, but make sure it has a single placeholder similar to the above example.

WHATSAPP_UP_CONTENT_SID

Default: None

Identifier of the Twilio content template to use for WhatsApp "up" notifications. Required by the WhatsApp integration.

Meta requires WhatsApp message templates to be pre-registered and approved. Create a content template in your Twilio account with the following contents:

The check “{{1}}” is now UP.

You can tweak the message contents as needed, but make sure it has a single placeholder similar to the above example.

ZULIP_ENABLED

Default: True

A boolean that turns on/off the Zulip integration. Enabled by default.