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Leader Elector

A simple leader election sidecar container for Kubernetes based on the recent client-go library. It aims to provide an alternative to the widely used but outdated election component of kubernetes/contrib.

Configuration Flags

The following arguments can be passed on the command line, or by setting the environment variable named in brackets.

  • election - name of the election and the corresponding lock resource (ELECTION_NAME).
  • namespace - the Kubernetes namespace to run the election in (ELECTION_NAMESPACE).
  • locktype - the resource type to use as the lock for this deployment (ELECTION_TYPE). Supported lock types are:
    • configmaps - default
    • leases
    • endpoints
  • port - the port on which the election sidecar can be queried (ELECTION_PORT).

Example

A working example deployment can be found under example/deployment.yaml. The necessary Role and RoleBindings must be applied prior via example/rbac.yaml.

Sidecar Response

{
  "name": "election-example-7548f6f8f7-fml47"
}