Enables publishing to various topics according to annotations
on the functions. The function cache is moved up one level so
that it can be shared between the scale from zero code and the
queue proxy.
Unit tests added for new internal methods.
Tested e2e with arkade and the newest queue-worker and RC
gateway image with two queues and an annotation on one of the
functions of com.openfaas.queue. It worked as expected including
with multiple namespace support.
Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
Allows alerts to trigger functions to scale when they
also have an optional namespace set.
Tested e2e with Kubernetes 1.15 and a non-default namespace.
Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
- max_conns / idle / per host are now read from env-vars and have
defaults set to 1024 for both values
- logging / metrics are collected in the client transaction
rather than via defer (this may impact throughput)
- function cache moved to use RWMutex to try to improve latency
around locking when updating cache
- logging message added to show latency in running GetReplicas
because this was observed to increase in a linear fashion under
high concurrency
- changes tested against 3-node bare-metal 1.13 K8s cluster
with kubeadm
Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>
- extracting this package means it can be used in other components
such as the asynchronous nats-queue-worker which may need to
invoke functions which are scaled down to zero replicas.
Ref: https://github.com/openfaas/nats-queue-worker/issues/32
Tested on Docker Swarm for scaling up, already scaled and not
found error.
Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>
