Vertical Scaling

Set resources.memory_mib to the initial memory allocation and auto_resize.memory_max_mib to the maximum memory that the runtime can grow to. The declarative config schema currently uses SandboxSet and sandboxes. Each entry in sandboxes creates or updates one runtime.

cat > deployment.json <<EOF
{
  "apiVersion": "runta/v1",
  "kind": "SandboxSet",
  "sandboxes": [
    {
      "name": "demo",
      "resources": {
        "vcpus": 1,
        "memory_mib": 512
      },
      "auto_resize": {
        "memory_max_mib": 16384
      }
    }
  ]
}
EOF

Deploy the runtime and check its initial memory:

runta apply -f deployment.json
runta ps -a
runta exec demo free -m

Resize the runtime to 4096 MiB, then verify the new allocation:

runta resize demo --memory 4096
runta exec demo free -m

Resize it back to 512 MiB and verify again:

runta resize demo --memory 512
runta exec demo free -m

Clean up:

runta delete -f deployment.json