Introduces a single-flight call to a function's health
endpoint to verify that it is registered with an Istio
sidecar (Envoy) before letting the invocation through.
Results are cached for 5 seconds, before a probe is
required again.
Tested without Istio, with probe_functions environment
variable set to true, I saw a probe execute in the logs.
Fixes: #1721 for Istio users.
Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alex@openfaas.com>
NATS moved its primary library to: github.com/nats-io/stan.go
This commit synchronises the library in the gateway to match the
queue worker.
Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
* This experimental patch records metrics as invocations start
so that the metrics can be used to make better scale to zero
decisions in faas-idler.
Tested with Kubernetes on a single-node cluster, metrics
reported as expected. Existing metrics still report.
Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
This patch enables the use-case for multiple namepsaces by
allowing a dot to be used in the function name.
dep has been run to update OpenFaaS projects and also to
prune unused files.
Tested by doing a build.
Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
