K8s Environment Detection

[jaredcnance]

https://kubernetes.io/docs/concepts/services-networking/service/#discovering-services

Example environment variables for an eks pod named eks-demo.

  KUBERNETES_SERVICE_PORT: '443',
  KUBERNETES_PORT: 'tcp://10.100.0.1:443',
  EKS_DEMO_PORT_80_TCP_PORT: '80',
  NODE_VERSION: '10.16.0',
  HOSTNAME: 'eks-demo-55f57f865b-l7tcs',
  EKS_DEMO_PORT_80_TCP_PROTO: 'tcp',
  YARN_VERSION: '1.16.0',
  SHLVL: '1',
  HOME: '/root',
  EKS_DEMO_PORT_80_TCP: 'tcp://10.100.122.110:80',
  AWS_EMF_ENABLE_DEBUG_LOGGING: 'true',
  KUBERNETES_PORT_443_TCP_ADDR: '10.100.0.1',
  PATH:
   '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin',
  AWS_EMF_AGENT_ENDPOINT: 'tcp://127.0.0.1:25888',
  KUBERNETES_PORT_443_TCP_PORT: '443',
  KUBERNETES_PORT_443_TCP_PROTO: 'tcp',
  EKS_DEMO_SERVICE_HOST: '10.100.122.110',
  KUBERNETES_PORT_443_TCP: 'tcp://10.100.0.1:443',
  KUBERNETES_SERVICE_PORT_HTTPS: '443',
  KUBERNETES_SERVICE_HOST: '10.100.0.1',
  EKS_DEMO_SERVICE_PORT: '80',
  EKS_DEMO_PORT: 'tcp://10.100.122.110:80',
  PWD: '/app/src'

[jaredcnance]

It looks like the only way to do env detection is through the downward API. We can provide an example that sets the library variables but doing this automatically does not appear to be possible yet.