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The remote shape mounts the Docker socket for browser containers #270

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Merged
czpython merged 1 commit into from
Aug 17, 2026
Merged

The remote shape mounts the Docker socket for browser containers #270

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9 changes: 9 additions & 0 deletions deploy/compose.remote.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -7,10 +7,19 @@
x-drukbox: &drukbox
image: ${DRUKS_SANDBOX_SERVICE_IMAGE:-ghcr.io/czpython/drukbox:latest}
network_mode: host
# Cloud VMs are the sandbox home; the mounted socket serves the docker
# provider that browser-session containers run on. install.sh records the
# socket's gid so drukbox's non-root appuser may use it.
group_add:
- "${DRUKS_DOCKER_GID:-0}"
volumes:
- /var/run/docker.sock:/var/run/docker.sock
env_file:
- ./.env
environment:
DATABASE_URL: postgresql+psycopg://${DRUKS_POSTGRES_USER:-druks}:${DRUKS_POSTGRES_PASSWORD}@127.0.0.1:5432/drukbox
# Browser containers run sshd for the druks user, not root.
DOCKER_SSH_USERNAME: druks
depends_on:
postgres:
condition: service_healthy
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20 changes: 11 additions & 9 deletions scripts/install.sh
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Expand Up @@ -124,17 +124,19 @@ main() {

# COMPOSE_FILE → .env, so plain `docker compose` in this dir loads the right
# overlay. `local` drives sandboxes on the host Docker daemon (dashboard on
# :8001, no Caddy); `remote` runs the cloud provider + Caddy. For local, the
# socket's gid rides along so drukbox's non-root appuser may use it — on
# macOS the host path is a user-owned symlink, but the socket Docker Desktop
# mounts into containers is group root, so the host gid would grant nothing.
# :8001, no Caddy); `remote` runs the cloud provider + Caddy. Both shapes
# mount the Docker socket — sandboxes on local, browser-session containers
# on remote — so the socket's gid rides along and drukbox's non-root appuser
# may use it. On macOS the host path is a user-owned symlink, but the socket
# Docker Desktop mounts into containers is group root, so the host gid would
# grant nothing.
if [ "$(uname -s)" = "Darwin" ]; then
set_env_var DRUKS_DOCKER_GID "0"
else
set_env_var DRUKS_DOCKER_GID "$(stat -c '%g' /var/run/docker.sock)"
fi
if [ "$PROVIDER" = "docker" ]; then
set_env_var COMPOSE_FILE "compose.yaml:compose.local.yaml"
if [ "$(uname -s)" = "Darwin" ]; then
set_env_var DRUKS_DOCKER_GID "0"
else
set_env_var DRUKS_DOCKER_GID "$(stat -c '%g' /var/run/docker.sock)"
fi
else
set_env_var COMPOSE_FILE "compose.yaml:compose.remote.yaml"
fi
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