Kubernetes | exec one-off
Processes could be spawn in an ad-hoc manner with kubectl exec. In some cases an interactive shell could be too much permissive.
Connection Configuration
| Name | Type | Description |
|---|---|---|
KUBECONFIG | filesystem | A kubeconfig file with permission to exec into pods in a namespace |
Connection Command
kubectl exec --stdin deployment/myapp --
How to Use
This example executes an one-off process using ruby.
hoop exec myapp-oneoff -- rails runner 'puts Rails.env'
Narrowing down the exec arguments, allow passing the stdin and executing ruby scripts.
- Edit the connection command with the bellow content
kubectl exec --stdin deployment/myapp -- rails runner -
Then, it's possible
hoop exec myapp-oneoff <<EOF
myvar='Hello'
puts myvar
EOF
The connection now runs one-off process accepting ruby scripts from the standard input.