A tiny health check tool for docker
Usage
docker-health-check -U=http://www.google.com:80
docker-health-check -h for help
Dockerfile can be used to output a tar holding the binary:
docker build .
docker run --rm <container_id> > hc.tar.gz
gunzip -c hc.tar.gz | tar xopf -
Integration
Two ways to incorporate the healthcheck into your Dockerfile.
Direct:
FROM ubuntu:latest as hc
ADD https://github.com/chrisaxiom/docker-health-check/blob/master/docker-health-check?raw=true /docker-health-check
chmod a+x /docker-health-check
# your container
FROM scratch
COPY --from=hc /docker-health-check /docker-health-check
HEALTHCHECK --interval=8s --timeout=120s --retries=8 CMD ["/docker-health-check", "-url=http://127.0.0.1:8000/api/ping"]
...
Versioned (recommended):
FROM ubuntu:latest as hc
ADD https://github.com/chrisaxiom/docker-health-check/archive/v0.3.tar.gz /
RUN tar -xvzf /v0.3.tar.gz
# your container
FROM scratch
COPY --from=hc /docker-health-check-0.3/docker-health-check /docker-health-check
HEALTHCHECK --interval=8s --timeout=120s --retries=8 CMD ["/docker-health-check", "-url=http://127.0.0.1:8000/api/ping"]
...
Not Supported (Yet)
- Response body checking
- Request body