Signed-off-by: Radoslav Dimitrov <rdimitrow@gmail.com>

- Removes use of "our" from CONTRIBUTING guide
- Updates/adds README.md files
- Commnents and typo fix in watchdog
- Adds good/bad examples of commit messages

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

Bumping the watchdog to 0.9.4 in
mentioned places

Signed-off-by: Martin Dekov (VMware) <mdekov@vmware.com>

- the shutdown sequence meant that the kubelet was still passing
work to the watchdog after the HTTP socket was closed. This change
means that the kubelet has a chance to run its check before we
finally stop accepting new connections. It will require some
basic co-ordination between the kubelet's checking period and the
"write_timeout" value in the container.

Tested with Kubernetes on GKE - before the change some Pods were
giving a connection refused error due to them being not detected
as unhealthy. Now I receive 0% error rate even with 20 qps.

Issue was shown by scaling to 20 replicas, starting a test with
hey and then scaling to 1 replica while tailing the logs from the
gateway. Before I saw some 502, now I see just 200s.

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

Convert all sample-functions to use curl to get the watchdog as
it can be cached by Docker. Issue #841

Signed-off-by: Radoslav Dimitrov <rdimitrow@gmail.com>

Full list of supported verbs is now supported: "GET", "POST", "PUT",
"PATCH", "DELETE"

Relates to: #openfaas/faas/issues/815

Signed-off-by: Edward Wilde <ewilde@gmail.com>

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

This test takes inspiration from the PR from @telackey with changes
to make it more maintainable. Since the test does not require
changes to the code, I wanted to add it before merging changes.

Ref: https://github.com/openfaas/faas/pull/789



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

Fixes: https://github.com/openfaas-incubator/of-watchdog/pull/24



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

This moves watchdog to a better name for images and also gives free
image-scanning and gives more confidence  to users  that components
ship regularly and makes any vulnerabilities  in  components  clear

Signed-off-by: Ivana Yovcheva (VMware) <iyovcheva@vmware.com>

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

Afterburn is deprecated in favour of of-watchdog. Removing link
to prevent confusion.

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

Extend the health endpoint and add gateway version information

Resolves: #733
Signed-off-by: Edward Wilde <ewilde@gmail.com>

Issue #660 has been open for a while to update to 1.9.6, this
performs the update to the latest in the 1.9 release (1.9.7)

Signed-off-by: Sean Smith <sean@wwsean08.com>

This updates alpine version to 3.7 in sample-functions, gateway
and some markdown docas.

Signed-off-by: Ivana Yovcheva (VMware) <iyovcheva@vmware.com>

This updates watchdog version to latest 0.8.0 in the functions
samples and documentation

Signed-off-by: Ivana Yovcheva (VMware) <iyovcheva@vmware.com>

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

Moves handler code into separate file but retains same
package.

Changes watchdog to print version on start-up so that we can
grab this from logs. Version flag is also present for getting
additional information if needed from a user's published
container without running their function.

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

This changes introduces a new flag -version to watchdog which will
display version and SHA of last git commit.

Version and SHA are injected at build time and passed as a
build-args for Dockerfile.

Fixes: #632

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

This updates fwatchdog to latest version (0.7.9) in all templates
in sample-functions and faas version in the documentation

Signed-off-by: Ivana Yovcheva (VMware) <iyovcheva@vmware.com>

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

If the watchdog is sent SIGTERM from an external process then it
should stop accepting new connections and attempt to finish the
work in progress. This change makes use of the new ability in Go
1.9 and onwards to cancel a HTTP server gracefully.

The write_timeout duration is used as a grace period to allow all
in-flight requests to complete. The pattern is taken directly from
the offical example in the Golang documentation. [1]

Further tuning and testing may be needed for Windows containers which
have a different set of signals for closing work. This change aims
to cover the majority use-case for Linux containers.

The HTTP health-check is also invalidated by creating an and
expression with the existing lock file.

Tested with Kubernetes by deploying a custom watchdog and the
fprocess of `env`. Log message was observed when scaling down and
connections stopped being accepted on terminating replica.

Also corrects some typos from previous PR.

[1] https://golang.org/pkg/net/http/#Server.Shutdown



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

The UPDATE HTTP Method isn't valid and not currently in use by the
watchdog so removing it.

Signed-off-by: John McCabe <john@johnmccabe.net>

This commit replaces occurences of http method strings with the
corresponding consts from the http package.

*Note* UPDATE is not strictly speaking a valid method and as such isn't
part of the http package (should be a PUT or PATCH?)

Signed-off-by: John McCabe <john@johnmccabe.net>

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>

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>

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>

Fixes #551

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

updated testcases

applied go fmt to readconfig

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

added requested changes in code review

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

Also bumps golang builder version to 1.9.4 for sample functions.

Signed-off-by: John McCabe <john@johnmccabe.net>

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

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

Signed-off-by: John McCabe <john@johnmccabe.net>