docker-healthcheck

A simple binary that can be used as healthcheck in docker containers.

This repository also contains binary files built for Alpine AMD64 and ARM64.

Usage

Include the binary in your image, either by COPYing from disk or ADDing directly from this repo, then use it as HEALTHCHECK:

For alpine linux AMD64:

FROM alpine

ADD https://github.com/jungsoft/docker-healthcheck/releases/download/0.1.0/healthcheck_alpine_amd64 /usr/local/bin/healthcheck
RUN chmod +x /usr/local/bin/healthcheck

HEALTHCHECK CMD healthcheck

If doing a multiplatform build, you can also do:

FROM alpine
ARG TARGETARCH

ADD hhttps://github.com/jungsoft/docker-healthcheck/releases/download/0.1.0/healthcheck_alpine_$TARGETARCH /usr/local/bin/healthcheck
RUN chmod +x /usr/local/bin/healthcheck

Or if you prefer COPYing:

FROM alpine

# Assuming local file already has permission to execute
COPY local/path/to/healthcheck /usr/local/bin/healthcheck

HEALTHCHECK CMD healthcheck

Building

To build it for alpine, you can use the go-alpine image, for example (alternatively, for ARM64, you can use docker run --rm -it arm64v8/golang:1.17-alpine) or directly from the command line with go installed:

go build healthcheck.go

The binary will be created inside the current directory with name healthcheck

Or alternatively for other operational systems or architectures, use respectively the envs GOOS and GOARCH (for better portability, make sure to use static linking with CGO_ENABLED=0):

CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o healthcheck_linux_amd64 healthcheck.go

CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o healthcheck_linux_arm64 healthcheck.go