Adds a pair of configuration options for performance tuning. The
gateway can now invoke functions directly and can bypass the
provider. See updated table in README.md for configuration values.

BaseURLResolver is added with unit tests that decouples resolving
upstream URL from the reverse proxy client code.

- SingleHostBaseURLResolver resolves a single upstream host
- FunctionAsHostBaseURLResolver resolves host based upon conventions
within the URL of the request to a function for direct access

Tested with Kubernetes (faas-netes) and faas-swarm through UI, CLI
calling system endpoints and functions directly.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

The default should be set to true so we maintain backwards.
compatibility.
readconfig.go was altered due to bug reading default value. This was
tested by adding unit tests to readconfig_test.go for positive and
negative scenarios.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

Adding a blog post on securing Kubernetes for OpenFaaS

Signed-off-by: Daniel Shapira <daniel@twistlock.com>

Signed-off-by: Burton Rheutan <rheutan7@gmail.com>

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

Introduce new endpoint `/_/health` to watchdog for health status of
functions  which check for `/tmp/.lock` file

Fixes first part of #547 issue.

Signed-off-by: Vivek Singh <vivekkmr45@yahoo.in>

Add link for rewriting Git history in preparation for Derek's new
commit message linting feature.

Adds guidelines for commit message formatting with rules
from Chris Beams' blog post here:

https://chris.beams.io/posts/git-commit/



Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Integration test for combine_output should use stat instead of
man as man is not installed in the CI system.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

This enables an often-requested feature to separate stderr
from stdout within function responses. New flag combine_output is on
by default to match existing behaviour. When combine_output is set
to false it redirects stderr to the container logs rather than
combining it into the function response.

Tested with unit tests for default behaviour and new behaviour.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

As added by previous commit with unit tests.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

HTTP port can now be overriden through use of "port" environmental
variable.

Prefer messaging "want" over "wanted" in error messages, this is more
idiomatic Golang.

Move away from Go ARMv6 (RPi Zero) and give ARMv7 as a minimum
version for release binaries.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

PWD links to HTTPS - this is now supported by the provider
Move references to localhost to 127.0.0.1 to prevent clashes with 
IPv6 aliases on Linux systems.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

Signed-off-by: rgee0 <richard@technologee.co.uk>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

Typo fix.

Fixes #567

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

Signed-off-by: Jono Finger <jono@foodnotblogs.com>

Signed-off-by: Jono Finger <jono@foodnotblogs.com>

Signed-off-by: Jono Finger <jfinger@plos.org>

Signed-off-by: Jono Finger <jfinger@plos.org>

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

updated after adding/deleting a different function.

Signed-off-by: Ken Fukuyama <kenfdev@gmail.com>

Signed-off-by: Ken Fukuyama <kenfdev@gmail.com>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Signed-off-by: Burton Rheutan <rheutan7@gmail.com>

Signed-off-by: Burton Rheutan <rheutan7@gmail.com>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>