plugin/health: implement dyn health checks (#1214)

Implement health.Healther in erratic and kubernetes plugin. The
kubernetes' healtcheck is only performed on startup - i.e. turn
healthy after the initial loading.

Erratic follow the drop count: every query%drop turns the healthcheck
unhealthy.

Fixes: #985

1 files changed, 4 insertions, 0 deletions

diff --git a/plugin/kubernetes/health.go b/plugin/kubernetes/health.go
new file mode 100644
index 000000000..243749210
--- /dev/null
+++ b/plugin/kubernetes/health.go
@@ -0,0 +1,4 @@
+package kubernetes
+
+// Health implements the health.Healther interface.
+func (k *Kubernetes) Health() bool { return k.APIConn.HasSynced() }