cobalt/docs/run-an-instance.md

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# how to host a cobalt instance yourself
## using docker compose and package from github (recommended)
to run the cobalt docker package, you need to have `docker` and `docker-compose` installed and configured.
if you need help with installing docker, follow *only the first step* of these tutorials by digitalocean:
- [how to install docker](https://www.digitalocean.com/community/tutorial-collections/how-to-install-and-use-docker)
- [how to install docker compose](https://www.digitalocean.com/community/tutorial-collections/how-to-install-docker-compose)
## how to run a cobalt docker package:
1. create a folder for cobalt config file, something like this:
```sh
mkdir cobalt
```
2. go to cobalt folder, and create a docker compose config file:
```sh
cd cobalt && nano docker-compose.yml
```
i'm using `nano` in this example, it may not be available in your distro. you can use any other text editor.
3. copy and paste the [sample config from here](https://github.com/wukko/cobalt/blob/current/docs/examples/docker-compose.example.yml) for either web or api instance (or both, if you wish) and edit it to your needs.
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make sure to replace default URLs with your own or cobalt won't work correctly.
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4. finally, start the cobalt container (from cobalt directory):
```sh
docker compose up -d
```
if you want your instance to support services that require authentication to view public content, create `cookies.json` file in the same directory as `docker-compose.yml`. example cookies file [can be found here](https://github.com/wukko/cobalt/blob/current/docs/examples/cookies.example.json).
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cobalt package will update automatically thanks to watchtower.
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it's highly recommended to use a reverse proxy (such as nginx) if you want your instance to face the public internet. look up tutorials online.
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## using regular node.js (useful for local development)
setup script installs all needed `npm` dependencies, but you have to install `node.js` *(version 18 or above)* and `git` yourself.
1. clone the repo: `git clone https://github.com/wukko/cobalt`.
2. run setup script and follow instructions: `npm run setup`. you need to host api and web instances separately, so pick whichever applies.
3. run cobalt via `npm start`.
4. done.
### ubuntu 22.04 workaround
`nscd` needs to be installed and running so that the `ffmpeg-static` binary can resolve DNS ([#101](https://github.com/wukko/cobalt/issues/101#issuecomment-1494822258)):
```bash
sudo apt install nscd
sudo service nscd start
```
## list of all environment variables
### variables for api
| variable name | default | example | description |
|:----------------------|:----------|:------------------------|:------------|
| `API_PORT` | `9000` | `9000` | changes port from which api server is accessible. |
| `API_URL` | | `https://co.wuk.sh/` | changes url from which api server is accessible. <br> ***REQUIRED TO RUN API***. |
| `API_NAME` | `unknown` | `ams-1` | api server name that is shown in `/api/serverInfo`. |
| `CORS_WILDCARD` | `1` | `0` | toggles cross-origin resource sharing. <br> `0`: disabled. `1`: enabled. |
| `CORS_URL` | not used | `https://cobalt.tools/` | cross-origin resource sharing url. api will be available only from this url if `CORS_WILDCARD` is set to `0`. |
| `COOKIE_PATH` | not used | `/cookies.json` | path for cookie file relative to main folder. |
| `PROCESSING_PRIORITY` | not used | `10` | changes `nice` value* for ffmpeg subprocess. available only on unix systems. |
| `TIKTOK_DEVICE_INFO` | | *see below* | device info (including `iid` and `device_id`) for tiktok functionality. required for tiktok to work. |
\* the higher the nice value, the lower the priority. [read more here](https://en.wikipedia.org/wiki/Nice_(Unix)).
#### TIKTOK_DEVICE_INFO
you need to get your own device info for tiktok functionality to work. this can be done by proxying the app through any request-intercepting proxy (such as [mitmproxy](https://mitmproxy.org)). you need to disable ssl pinning to see requests. there will be no assistance provided by cobalt for this.
example config (replace **ALL** values with ones you got from mitm):
```json
'{
"iid": "<install_id here>",
"device_id": "<device_id here>",
"channel": "googleplay",
"app_name": "musical_ly",
"version_code": "310503",
"device_platform": "android",
"device_type": "Redmi+7",
"os_version": "13"
}'
```
you can compress the json to save space. if you're using a `.env` file then the line would would look like this (***note the quotes***):
```
TIKTOK_DEVICE_INFO='{"iid":"<install_id here>","device_id":"<device_id here>","channel":"googleplay","app_name":"musical_ly","version_code":"310503","device_platform":"android","device_type":"Redmi+7","os_version":"13"}'
```
### variables for web
| variable name | default | example | description |
|:---------------------|:---------------------|:------------------------|:--------------------------------------------------------------------------------------|
| `WEB_PORT` | `9001` | `9001` | changes port from which frontend server is accessible. |
| `WEB_URL` | | `https://cobalt.tools/` | changes url from which frontend server is accessible. <br> ***REQUIRED TO RUN WEB***. |
| `API_URL` | `https://co.wuk.sh/` | `https://co.wuk.sh/` | changes url which is used for api requests by frontend clients. |
| `SHOW_SPONSORS` | `0` | `1` | toggles sponsor list in about popup. <br> `0`: disabled. `1`: enabled. |
| `IS_BETA` | `0` | `1` | toggles beta tag next to cobalt logo. <br> `0`: disabled. `1`: enabled. |
| `PLAUSIBLE_HOSTNAME` | | `plausible.io`* | enables plausible analytics with provided hostname as receiver backend. |
\* don't use plausible.io as receiver backend unless you paid for their cloud service. use your own domain when hosting community edition of plausible. refer to their [docs](https://plausible.io/docs) when needed.