installing emulator cert and setting up the app config

Author: aaronpowell

.devcontainer/devcontainer.json

@@ -22,14 +22,17 @@
     "ionide.ionide-paket",
     "github.vscode-pull-request-github",
     "paolodellepiane.fantomas-fmt",
-    "ms-azuretools.vscode-cosmosdb"
+    "ms-azuretools.vscode-cosmosdb",
+    "ms-azuretools.vscode-docker"
   ],
 
   // Use 'forwardPorts' to make a list of ports inside the container available locally.
   // "forwardPorts": [],
 
   // Use 'postCreateCommand' to run commands after the container is created.
-  "postCreateCommand": "dotnet tool restore && dotnet restore && ./.devcontainer/start.sh",
+  "postCreateCommand": "dotnet tool restore && dotnet restore",
+
+  "postStartCommand": "./.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

@@ -2,35 +2,35 @@ version: '3'
 
 services:
   app:
-    build: 
+    build:
       context: .
       dockerfile: Dockerfile
       args:
-            USER_UID: 1000
-            USER_GID: 1000
-            VARIANT: "6.0"
+        USER_UID: 1000
+        USER_GID: 1000
+        VARIANT: "6.0"
 
     init: true
     volumes:
-        - /var/run/docker.sock:/var/run/docker-host.sock
-        - ..:/workspace:cached
+      - /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:
+    container_name: 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"
+      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
+      # Forwards the local Docker socket to the container.
+      - /var/run/docker.sock:/var/run/docker-host.sock

.devcontainer/start.sh

@@ -2,10 +2,14 @@
 
 set -euxo pipefail
 
+COSMOS__ENDPOINT=https://$(docker inspect cosmos -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}'):8081
+
 # Try to get the emulator cert in a loop
 until sudo curl -ksf "${COSMOS__ENDPOINT}/_explorer/emulator.pem" -o '/usr/local/share/ca-certificates/emulator.crt'; do
   echo "Downloading cert from $COSMOS__ENDPOINT"
   sleep 1
 done
 
 sudo update-ca-certificates
+
+echo '{ "Cosmos": { "EndPoint" : "'$COSMOS__ENDPOINT'" } }' >> ./samples/FSharp.CosmosDb.Samples/appsettings.Development.json