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# Nix + Google Cloud Run (i.e. GCR)
I'm documenting how I currently deploy projects that I package with Nix on
Google Cloud Run.
I'd like to automate this workflow as much as possible, and I intend to do just
that. For now, I'm running things manually until I can design an generalization
that appeals to me.
## Dependencies
- `nix-build`
- `docker`
- `gcloud`
## Step-by-step
1. Use `nix-build` to create our Docker image for Cloud Run.
```shell
> nix-build ./cloud_run.nix
```
This outputs a Docker image at `./result`.
1. Load the built image (i.e. `./result`) into `docker` so that we can tag it
and push it to the Google Container Registry (i.e. GCR).
```shell
> sudo docker load <./result
```
1. (Optionally) Run the image locally to verify its integrity.
```shell
> sudo docker run -d -p 8080:4242 <name>:<tag>
```
1. Tag and push the image to GCR.
```shell
> sudo docker tag <name>:<label> gcr.io/<google-cloud-project-id>/<name>:<latest>
```
1. Visit Google Cloud Run; create a new service with "Create Service"; select
the uploaded Docker image from the "Container Image URL" field; click
"Create" to deploy.
## Notes
You may need to authorize `gcloud` by running the following:
```shell
> sudo gcloud auth login --no-launch-browser
```
You must use `sudo` here since the `docker` invocations are prefixed with `sudo`
as well.
## Todos
- If possible, prefer using a command line tool like `gcloud` to create the
Cloud Run service.
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