According to this document, any similarly named tags should override. It doesn’t specify any limitations.
Merge and override | Docker Documentation
And even states:
Shell commands
When merging Compose files that use the services attributes command, entrypoint and healthcheck: test, the value is overridden by the latest Compose file, and not appended.
So for the following docker-compose:
caddy:
container_name: caddy
restart: always
mem_limit: 75m
healthcheck:
# https://stackoverflow.com/a/47722899/5008962
test: ["CMD", "wget", "--no-verbose", "-T","1", "http://localhost:2019/metrics","-O","-" ]
interval: 1m30s
timeout: 10s
retries: 3
start_period: 40s
logging:
driver: journald
options:
tag: "{{.Name}}/{{.ID}}"
labels:
- "autoheal=true"
- com.centurylinklabs.watchtower.enable=false
build:
context: "/hdd/docker-data/network_access/caddy/docker/"
dockerfile: dockerfile
Looking specifically at the healthcheck, I want to override this with a machine override:
docker-compose-mymachine.yml
caddy:
healthcheck:
# I tried adding '&& exit 1', '|| exit `' it doesn't work.
test: !reset bash -c "test -f /podcasts/hello && exit 0 || exit 1"
interval: 5m
timeout: 30s
retries: 3
start_period: 40s
I run these with the following command:
docker-compose -f docker-compose.yml -f docker-compose-mymachine.yml up -d
The resulting container though, has the following on the healthcheck:
{
"Test": [
"CMD",
"wget",
"--no-verbose",
"-T",
"1",
"http://localhost:2019/metrics",
"-O",
"-",
"CMD-SHELL",
"bash -c \"test -f /podcasts/hello && exit 0 || exit 1\""
],
"Interval": 300000000000,
"Timeout": 30000000000,
"StartPeriod": 40000000000,
"Retries": 3
}
So it’s added the 2 tests. IS that beause its added CMD-SHELL to the test? Though given the keyword value is test, I’d have expected the mymachine healthcheck to override the test value entirely.
Docker-Compose is
Docker Compose version v2.4.1
Docker compose file versions 2.3