working on integrating the Cosmos docker emulator for simpler local dev

Author: aaronpowell

.devcontainer/Dockerfile

@@ -1,20 +1,28 @@
 ARG VARIANT="6.0-bullseye-slim"
 FROM mcr.microsoft.com/vscode/devcontainers/dotnet:0-${VARIANT}
 
-# [Option] Install Node.js
-ARG INSTALL_NODE="true"
-ARG NODE_VERSION="lts/*"
-RUN if [ "${INSTALL_NODE}" = "true" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
+# [Option] Enable non-root Docker access in container
+ARG ENABLE_NONROOT_DOCKER="true"
+# [Option] Use the OSS Moby CLI instead of the licensed Docker CLI
+ARG USE_MOBY="true"
 
-# [Option] Install Azure CLI
-ARG INSTALL_AZURE_CLI="false"
-COPY library-scripts/azcli-debian.sh /tmp/library-scripts/
-RUN if [ "$INSTALL_AZURE_CLI" = "true" ]; then bash /tmp/library-scripts/azcli-debian.sh; fi \
-    && apt-get clean -y && rm -rf /var/lib/apt/lists/* /tmp/library-scripts
+# Enable new "BUILDKIT" mode for Docker CLI
+ENV DOCKER_BUILDKIT=1
 
-# [Optional] Uncomment this section to install additional OS packages.
-# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
-#     && apt-get -y install --no-install-recommends <your-package-list-here>
+# Install needed packages and setup non-root user. Use a separate RUN statement to add your
+# own dependencies. A user of "automatic" attempts to reuse an user ID if one already exists.
+ARG USERNAME=automatic
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+COPY library-scripts/*.sh /tmp/library-scripts/
+RUN apt-get update \
+    && /bin/bash /tmp/library-scripts/common-debian.sh "${INSTALL_ZSH}" "${USERNAME}" "${USER_UID}" "${USER_GID}" "${UPGRADE_PACKAGES}" "true" "true" \
+    # Use Docker script from script library to set things up
+    && /bin/bash /tmp/library-scripts/docker-debian.sh "${ENABLE_NONROOT_DOCKER}" "/var/run/docker-host.sock" "/var/run/docker.sock" "${USERNAME}" \
+    # Clean up
+    && apt-get autoremove -y && apt-get clean -y && rm -rf /var/lib/apt/lists/* /tmp/library-scripts/
 
-# [Optional] Uncomment this line to install global node packages.
-# RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && npm install -g <your-package-here>" 2>&1
+# Setting the ENTRYPOINT to docker-init.sh will configure non-root access 
+# to the Docker socket. The script will also execute CMD as needed.
+ENTRYPOINT [ "/usr/local/share/docker-init.sh" ]
+CMD [ "sleep", "infinity" ]

.devcontainer/devcontainer.json

@@ -1,39 +1,36 @@
 {
-	"name": "FSharp.CosmosDB",
-	"build": {
-		"dockerfile": "Dockerfile",
-		"args": {
-			// Options
-			"INSTALL_NODE": "false",
-			"NODE_VERSION": "lts/*",
-			"INSTALL_AZURE_CLI": "true",
-			"UPGRADE_PACKAGES": "false",
-			"VARIANT": "6.0"
-		}
-	},
+  "name": "FSharp.CosmosDB",
+  "dockerComposeFile": "docker-compose.yml",
+  "service": "app",
+  "workspaceFolder": "/workspace",
 
-	"settings": {
-		"terminal.integrated.defaultProfile.linux": "zsh"
-	},
+  // Use this environment variable if you need to bind mount your local source code into a new container.
+  "remoteEnv": {
+    "LOCAL_WORKSPACE_FOLDER": "${localWorkspaceFolder}"
+  },
 
-	// Add the IDs of extensions you want installed when the container is created.
-	"extensions": [
-		"Ionide.Ionide-fsharp",
-		"ms-dotnettools.csharp",
-		"ms-vscode.azure-account",
-		"ionide.ionide-fake",
-		"ionide.ionide-paket",
-		"github.vscode-pull-request-github",
-		"paolodellepiane.fantomas-fmt",
-		"ms-azuretools.vscode-cosmosdb"
-	],
+  "settings": {
+    "terminal.integrated.defaultProfile.linux": "zsh"
+  },
 
-	// Use 'forwardPorts' to make a list of ports inside the container available locally.
-	// "forwardPorts": [],
+  // Add the IDs of extensions you want installed when the container is created.
+  "extensions": [
+    "Ionide.Ionide-fsharp",
+    "ms-dotnettools.csharp",
+    "ms-vscode.azure-account",
+    "ionide.ionide-fake",
+    "ionide.ionide-paket",
+    "github.vscode-pull-request-github",
+    "paolodellepiane.fantomas-fmt",
+    "ms-azuretools.vscode-cosmosdb"
+  ],
 
-	// Use 'postCreateCommand' to run commands after the container is created.
-	"postCreateCommand": "dotnet tool restore && dotnet restore",
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  // "forwardPorts": [],
 
-	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
-	"remoteUser": "vscode"
+  // Use 'postCreateCommand' to run commands after the container is created.
+  "postCreateCommand": "dotnet tool restore && dotnet restore && ./.devcontainer/start.sh",
+
+  // Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+  "remoteUser": "vscode"
 }

.devcontainer/docker-compose.yml

@@ -0,0 +1,36 @@
+version: '3'
+
+services:
+  app:
+    build: 
+      context: .
+      dockerfile: Dockerfile
+      args:
+            USER_UID: 1000
+            USER_GID: 1000
+            VARIANT: "6.0"
+
+    init: true
+    volumes:
+        - /var/run/docker.sock:/var/run/docker-host.sock
+        - ..:/workspace:cached
+
+    entrypoint: /usr/local/share/docker-init.sh
+    command: sleep infinity
+    environment:
+      # These names aren't special - they're just used in the Node app to configure the CosmosClient
+      COSMOS__ENDPOINT: https://cosmos:8081
+      # This is the publicly documented emulator key
+      COSMOS__KEY: 'C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw=='
+
+    network_mode: service:cosmos
+  cosmos:
+    image: mcr.microsoft.com/cosmosdb/linux/azure-cosmos-emulator:latest
+    mem_limit: 3g
+    cpu_count: 2
+    environment:
+        AZURE_COSMOS_EMULATOR_PARTITION_COUNT: 10
+        AZURE_COSMOS_EMULATOR_ENABLE_DATA_PERSISTENCE: "true"
+    volumes:
+        # Forwards the local Docker socket to the container.
+        - /var/run/docker.sock:/var/run/docker-host.sock