Use runit for all-in-one Docker image (#2203)

Horrible hacks 😬, but good enough for all-in-one Docker image that
should not be used for anything serious.

Closes #1987.

.dockerignore

@@ -1,5 +1,6 @@
 **
 
+# Go code
 !build/version
 !cmd
 !internal
@@ -8,3 +9,6 @@
 
 # so `go build` could set `vcs.revision`, etc.
 !.git
+
+# additional files for Docker images
+!build/docker

Taskfile.yml

@@ -455,8 +455,7 @@ tasks:
           DOCKER_IMAGES: ferretdb-local
           OUTPUT: type=docker
 
-  # TODO set annotations,
-  # see https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#adding-a-description-to-multi-arch-images
+  # TODO https://github.com/FerretDB/FerretDB/issues/2212
   docker-all-in-one-push:
     cmds:
       - echo 'docker-all-in-one' > build/version/package.txt
@@ -466,8 +465,7 @@ tasks:
           PLATFORM: linux/amd64,linux/arm64 # no mongosh for arm/v7
           OUTPUT: type=image,push=true
 
-  # TODO set annotations,
-  # see https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#adding-a-description-to-multi-arch-images
+  # TODO https://github.com/FerretDB/FerretDB/issues/2212
   docker-development-push:
     cmds:
       - echo 'docker' > build/version/package.txt
@@ -477,8 +475,7 @@ tasks:
           PLATFORM: linux/amd64,linux/arm64,linux/arm/v7
           OUTPUT: type=image,push=true
 
-  # TODO set annotations,
-  # see https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#adding-a-description-to-multi-arch-images
+  # TODO https://github.com/FerretDB/FerretDB/issues/2212
   docker-production-push:
     cmds:
       - echo 'docker' > build/version/package.txt

build/docker/all-in-one.Dockerfile

@@ -84,6 +84,12 @@ ARG LABEL_COMMIT
 
 COPY --from=all-in-one-build /src/bin/ferretdb /ferretdb
 
+# all-in-one hacks start there
+
+COPY --from=all-in-one-build /src/build/docker/all-in-one/ferretdb.sh /etc/service/ferretdb/run
+COPY --from=all-in-one-build /src/build/docker/all-in-one/postgresql.sh /etc/service/postgresql/run
+COPY --from=all-in-one-build /src/build/docker/all-in-one/entrypoint.sh /entrypoint.sh
+
 RUN <<EOF
 set -ex
 
@@ -95,17 +101,26 @@ apt update
 apt install -y mongodb-mongosh
 EOF
 
+ENV FERRETDB_POSTGRESQL_URL=postgres://username:password@127.0.0.1:5432/ferretdb
+ENV POSTGRES_USER=username
+ENV POSTGRES_PASSWORD=password
+ENV POSTGRES_DB=ferretdb
+
+STOPSIGNAL SIGKILL
+
 WORKDIR /
-ENTRYPOINT [ "/ferretdb" ]
+ENTRYPOINT [ "/entrypoint.sh" ]
 EXPOSE 27017 27018 8080
 
+# all-in-one hacks stop there
+
 # don't forget to update documentation if you change defaults
 ENV FERRETDB_LISTEN_ADDR=:27017
 # ENV FERRETDB_LISTEN_TLS=:27018
 ENV FERRETDB_DEBUG_ADDR=:8080
 ENV FERRETDB_STATE_DIR=/state
 
-# https://github.com/opencontainers/image-spec/blob/main/annotations.md
+# TODO https://github.com/FerretDB/FerretDB/issues/2212
 LABEL org.opencontainers.image.description="A truly Open Source MongoDB alternative"
 LABEL org.opencontainers.image.licenses="Apache-2.0"
 LABEL org.opencontainers.image.revision="${LABEL_COMMIT}"

build/docker/all-in-one/entrypoint.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+set -ex
+
+# Don't use `exec` so ctrl+c / SIGINT stops bash and not runsvdir (which ignores SIGINT).
+# That's a hack, but good enough for all-in-one container.
+/usr/bin/runsvdir /etc/service

build/docker/all-in-one/ferretdb.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -ex
+
+exec /ferretdb

build/docker/all-in-one/postgresql.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -ex
+
+exec /usr/local/bin/docker-entrypoint.sh postgres

build/docker/development.Dockerfile

@@ -94,7 +94,7 @@ ENV FERRETDB_LISTEN_ADDR=:27017
 ENV FERRETDB_DEBUG_ADDR=:8080
 ENV FERRETDB_STATE_DIR=/state
 
-# https://github.com/opencontainers/image-spec/blob/main/annotations.md
+# TODO https://github.com/FerretDB/FerretDB/issues/2212
 LABEL org.opencontainers.image.description="A truly Open Source MongoDB alternative"
 LABEL org.opencontainers.image.licenses="Apache-2.0"
 LABEL org.opencontainers.image.revision="${LABEL_COMMIT}"

build/docker/production.Dockerfile

@@ -81,7 +81,7 @@ ENV FERRETDB_LISTEN_ADDR=:27017
 ENV FERRETDB_DEBUG_ADDR=:8080
 ENV FERRETDB_STATE_DIR=/state
 
-# https://github.com/opencontainers/image-spec/blob/main/annotations.md
+# TODO https://github.com/FerretDB/FerretDB/issues/2212
 LABEL org.opencontainers.image.description="A truly Open Source MongoDB alternative"
 LABEL org.opencontainers.image.licenses="Apache-2.0"
 LABEL org.opencontainers.image.revision="${LABEL_COMMIT}"