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>
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>
- updates the Prometheus go client version and switches to the
promhttp handler to avoid conflicts with the new system-level
metrics.
Tested with Docker Swarm locally - no conflicts and new metrics
were gathered.
Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>
