02-do-app-platform.md

DigitalOcean App Platform

• Back to README
• Heroku
• DigitalOcean App Platform
• Fly.io
• Docker Compose

Using doctl,you'll need to authenticate first, and possibly use a named context if you are using multiple accounts:

# simplest
doctl auth init

# or use a specific token for an account
export TOKEN=$(cat ~/.do/doctl-token)
doctl auth init -t $TOKEN

# or use a named context
doctl auth list
doctl auth switch --context <context_name>

We use the app spec in the app.yml file to validate and create the app:

# Validate app spec
doctl apps spec validate app.yml

# Create app
doctl apps create --spec app.yml

Use the app ID from the output of the deployment or from doctl apps list if you want to delete the app:

export ID=d53da7f9-7b23-48af-9f2f-5224210df12c
doctl apps delete $ID --force

Scaling on DO App Platform

Scale the app: first change the instance size to professional (basic plan cannot have instance count >1):

[...]
  instance_size_slug: professional-xs
[...]

Run doctl apps create --spec app.yml --upsert to apply the changes to an existing app.

Next change the instance count:

[...]
  instance_count: 2
[...]

And run doctl apps create --spec app.yml --upsert once more.

Visit the app URL, and you'll see Status: Failure!.

R version

For the R app, use the app-r.yml file and repeat the steps above:

# DO
doctl apps create --spec app-r.yml