Deployments, like Nodes, have status conditions observing the
current state. While the state of Available and Progressing conditions
can likely be inferred by other metrics, the state of ReplicaFailure can
not be inferred.
This changelist adds a new metric `kube_deployment_status_condition`
that observes all the conditions on a deployment for each condition
status. This is analogous to the status conditions observed by nodes and
horizontal pod autoscalers, and allows kube-state-metrics to observe
status conditions added by third-parties.
As an example, for a deployment that has stalled, the following new
metrics observed would allow an operator to detect the condition:
kube_deployment_status_condition{deployment="example", namespace="default", condition="ReplicaFailure", status="true"} 1
kube_deployment_status_condition{deployment="example", namespace="default", condition="ReplicaFailure", status="false"} 0
kube_deployment_status_condition{deployment="example", namespace="default", condition="ReplicaFailure", status="unknown"} 0
Bug: #886
Signed-off-by: Terin Stock <terin@cloudflare.com>
Catherine Fang
Sylvain Rabot
Akshit Grover
Olivier Lemasle
Terin Stock
Tariq Ibrahim
Andrey Sidorov