Meta Labels

Using Meta Labels

Meta labels can be used to define custom runner labels that will be expanded to include itself as well as any other supported labels, such as:

• type-{name}. See Specifying The Runner Image.
• in-{name}. See Specifying The Runner Location.
• net-{name}. See Specifying The Runner Network.
• image-{architecture}-{type}-{name}. See Specifying The Runner Image.
• setup-{name}. See Specifying The Custom Runner Server Setup Script.
• startup-{name}. See Specifying The Custom Runner Server Startup Script.

The meta labels can be defined using the --meta-label option. More than one meta label can be defined.

⚠️ Warning:	Composite label values for `type-` and `in-` do not work inside meta labels. ✅ --meta-label test-x86 "self-hosted,type-cx22,type-cpx11" — works ❌ --meta-label test-x86 "self-hosted,type-cx22-cpx11" — does not work
✋ Note:	The meta label is not replaced but expanded to include itself and any labels that are defined for it. For example, --meta-label test-x86 "self-hosted,type-cx22,type-cpx11" runs-on: [test-x86] — is expanded to runs-on: [self-hosted, test-x86, type-cx22, type-cpx11]

Interaction with --label-prefix and --with-label options

• The --label-prefix option is checked after the meta labels have been expanded.
• The --with-label option is checked before the meta labels are expanded.

Examples

• You can define test-arm and test-x86 meta labels to provide x86 and ARM runners with the specific server type and image.

  github-hetzner-runners --meta-label test-arm "self-hosted,type-cax21,image-arm-system-ubuntu-22.04" --meta-label test-x86 "self- 
  hosted,type-cpx21,image-x86-system-ubuntu-22.04"

  will define the following two meta labels:

  • test-arm that will map to [test-arm, self-hosted, type-cax21, image-arm-system-ubuntu-22.04]
  • test-x86 that will map to [test-x86, self-hosted, type-cpx21, image-x86-system-ubuntu-22.04]

  Once meta labels are defined, you can use them to request a runner with the corresponding labels.

  job-name:
    runs-on: [test-arm]

  that will be equivalent to

  job-name:
    runs-on: [test-arm, self-hosted, type-cax21, image-arm-system-ubuntu-22.04]

  and

  job-name:
    runs-on: [test-x86]

  that will be equivalent to

  job-name:
    runs-on: [test-x86, self-hosted, type-cpx21, image-x86-system-ubuntu-22.04]

• You can make self-hosted to be a meta label to include your custom defaults for server type, server image and location.

  github-hetzner-runners  --meta-label self-hosted type-cax21,image-arm-system-ubuntu-22.04,in-hel1

• You can use meta label to define proper server image for ARM server types given that the default image is for x86.

  github-hetzner-runners  --meta-label type-cax21 image-arm-system-ubuntu-22.04