Docker Health Check using Make

Dockerfile

FROM nginx
HEALTHCHECK --interval=3s --retries=20 CMD curl -fs http://localhost:${HTTP_PORT:-8000}

Dockerfile.mysql

FROM mysql:5.7
HEALTHCHECK --interval=3s --retries=20 CMD mysqlshow -u ${MYSQL_USER} -p${MYSQL_PASSWORD}

Makefile

# Service health functions
# Syntax: $(call check_service_health,<docker-compose-environment>,<service-name>)
get_container_id = $$(docker-compose $(1) ps -q $(2))
get_container_state = $$(echo $(call get_container_id,$(1),$(2)) | xargs -I ID docker inspect -f '$(3)' ID)
get_service_health = $$(echo $(call get_container_state,$(1),$(2),{{if .State.Running}}{{ .State.Health.Status }}{{end}}))
check_service_health = { \
  until [[ $(call get_service_health,$(1),$(2)) != starting ]]; \
    do sleep 1; \
  done; \
  if [[ $(call get_service_health,$(1),$(2)) != healthy ]]; \
    then echo $(2) failed health check; exit 1; \
  fi; \
}

# $(RELEASE_ARGS) represents the '-p <project> -f <docker-compose-file>' portion of docker-compose command
release:
  # Start mysql container
  @ docker-compose $(RELEASE_ARGS) up -d mysql
  # This will wait until mysql container health changes from starting to healthy or unhealthy
  @ $(call check_service_health,$(RELEASE_ARGS),mysql)
  # Start nginx container
  @ docker-compose $(RELEASE_ARGS) up -d nginx
  # This will wait until nginx container health changes from starting to healthy or unhealthy
  @ $(call check_service_health,$(RELEASE_ARGS),nginx)