faas/watchdog

Watchdog

The FaaS watchdog is designed to marshal a HTTP request between your public HTTP URL and a individual function.

Creating a function:

• Use an existing or a new Docker image
• Add the fwatchdog binary from the Releases page via curl or ADD https://
• Set an fprocess environmental variable with the function you want to run for each request
• Expose port 8080
• Set the CMD to fwatchdog

Example Dockerfile:

FROM alpine:3.5

ADD https://github.com/alexellis/faas/releases/download/v0.5-alpha/fwatchdog /usr/bin
RUN chmod +x /usr/bin/fwatchdog

# Define your UNIX binary here
ENV fprocess="/bin/cat"

CMD ["fwatchdog"]

Environmental overrides:

A number of environmental overrides can be added for additional flexibility and options:

Option	Usage
fprocess	The process to invoke for each function call. This must be a UNIX binary and accept input via STDIN and output via STDOUT.
marshal_requests	Instead of re-directing the raw HTTP body into your fprocess, it will first be marshalled into JSON. Use this if you need to work with HTTP headers
write_timeout	HTTP timeout for writing a response body from your function
read_timeout	HTTP timeout for reading the payload from the client caller