cogs

A simple server for executing adhoc scripts or running scripts on a schedule all in a single file

Features

• Run scripts on demand or cron schedule
• Webhook, email and Slack notifications
• Script execution history
• Light brand configuration
• Secret management
• Permissions per project
• Web UI
• REST API (Basic)

Quick Start (non docker)

Download the latest release from the releases page

Start cogs with the following command

./cogs -data=/path/to/data

Once Cogs has launched navigate to http://localhost:8080 and login with the default username and password - make sure to change these after logging in

Username: [email protected]
Password: ChangeMe1234!

Docker Quick Start

TODO

Best Practices

• Change the default admin password
• Do not run cogs as root as script execution can leak into your environment
• Do not run cogs on a public network as it does not have MFA for the web UI

Configuration

You can configure cogs with either command line flags or environment variables. The following table shows the available options

When both a flag and environment variable are set, the environment variable takes precedence.

If you do not supply values for the smtp configuration options your email notifications will fail to send

Flag	Environment Variable	Description	Default
-data	COGS_DATA	The path to the data directory where all data is stored	./data
-port	COGS_PORT	The port to run the server on	8080
-callback	COGS_CALLBACK_URL	The base URL for notifications to link back to	http://localhost:8080
-smtp-host	COGS_SMTP_HOST	The SMTP host to use for sending emails
-smtp-port	COGS_SMTP_PORT	The SMTP port to use for sending emails	25
-smtp-username	COGS_SMTP_USERNAME	The SMTP username to use for sending emails
-smtp-password	COGS_SMTP_PASSWORD	The SMTP password to use for sending emails
-smtp-from	COGS_SMTP_FROM	The SMTP from address to use for sending emails	[email protected]
-level	COGS_LOG_LEVEL	The log Level (DEBUG, INFO, WARN, ERROR)	INFO
-format	COGS_LOG_FORMAT	The log format	text
-brand	COGS_BRAND	The brand name for login and headers	Cogs
-retention	COGS_HISTORY_RETENTION_DAYS	The number of days to keep job history	30

Notifications

Slack

Slack Notifications use the Slack Incoming Webhook integration. You will need to create a webhook and supply the URL to cogs.

Email

Email notifications use SMTP to send emails. You will need to supply the SMTP host, port, username and password to cogs either through flags or environment variables.

Webhook

Webhooks notifications are always sent as POST requests and include the data schema below.

{
  "project_name": "Your Project Name",
  "script_name": "Your Script Name",
  "history_link": "http://localhost:8080/projects/3/5/history/17",
  "success": true,
  "triggered_by": "[email protected]",
  "trigger": "webUI",
  "duration_seconds": 3,
  "run_id": 17,
  "created_at": "2023-07-21T22:07:48.587324101-05:00"
}

Using Secrets

Secrets are scoped to the project level and therefore are created inside each project. Scripts reference secrets in their project with environment variables like below

# A secret created with the name "password" would be referenced as $COGS_SECRET_PASSWORD
echo $COGS_SECRET_PASSWORD

Using Schedules

Each job may have a schedule set and either enabled or disabled. Schedules that are configured but disabled do not run.

A schedule must be specified in the cron format and may be set to run at any interval.

Note: Scheduled scripts will not have any input values available to them

Special cases

• If a job is running and the schedule is set to run the job will run a second time
• If a job is set to run frequently and a previous run does not finish the new run will still start

Specifying Script Inputs

Script inputs are written in raw JSON currently, the below example shows both a drop-down (select) implementation and a free form implementation

When strict_options is set to true you must provide an array of options

Arguments are accessed by scripts as environment variables. The name of the argument is converted to uppercase and prefixed with COGS_

[
  {
    "name": "Name",
    "description": "Freeform input example",
    "strict_options": false
  },
  {
    "name": "Greeting",
    "description": "Dropdown input example",
    "strict_options": true,
    "options": [
      "hello",
      "hi",
      "howdy",
      "sup"
    ]
  }
]

When the above input is used in a script the following environment variables will be available for the script to use

echo $COGS_NAME
echo $COGS_GREETING

Backups and Restoration

Cogs data is stored in a sqlite3 database and can be backed up by simply creating a copy of that file and storing it in a different location. The file is data.db and can be found at the location of -data or COGS_DATA

Restoring a backup is as simple as stopping the service and then replacing the data.db file with the backup file.

REST API

The REST API is available at /api/v1/ and requires an administrator API token to interact with.

Authentication

All requests to the API must have the header x-api-key set to a valid API token with administrator privileges.

Available endpoints are

• GET /api/v1/projects | Lists all projects
• GET /api/v1/projects/{project_id} | Lists all scripts within the specified project
• GET /api/v1/scripts/{script_id} | Gets the specified script
• PUT /api/v1/scripts/{script_id} | Updates the specified script
• POST /api/v1/run/{script_id} | Runs the specified script
• GET /api/v1/history/{script_id} | Lists execution history for the specified script
• GET /api/v1/history/{script_id}/{history_id} | Gets the specified execution history

Development

Running cogs locally for development

go run cmd/server/main.go -data=tmp -port=8080

Adding Database Schemas

go run -mod=mod entgo.io/ent/cmd/ent new NameOfObject

Generate the updated models

go generate ./ent