Modify stress tests

Author: Kaniska244

.github/workflows/docker-in-docker-stress-test.yaml

@@ -18,8 +18,8 @@ jobs:
       - name: "Install latest devcontainer CLI"
         run: npm install -g @devcontainers/cli
 
-      - name: "Generating tests for 'docker-in-docker' which validates if docker daemon is running"
-        run: devcontainer features test --skip-scenarios -f docker-in-docker -i mcr.microsoft.com/devcontainers/base:noble .
+      - name: "Generating tests for 'docker-in-docker' which validates if docker daemon is running (with iptablesSwitchAtRuntime=true)"
+        run: devcontainer features test -f docker-in-docker --skip-autogenerated --filter "docker_stress_iptables_runtime" .
 
   test-onCreate:
     strategy:

test/docker-in-docker/docker_stress_iptables_runtime.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+# Stress scenario: validates the docker daemon works when the iptables
+# alternative switching is deferred to container start (iptablesSwitchAtRuntime=true).
+check "init-script-exists" bash -c "test -f /usr/local/share/docker-init.sh"
+check "runtime-iptables-block-present" bash -c "grep -q 'update-alternatives --set iptables' /usr/local/share/docker-init.sh"
+
+check "version" docker --version
+check "docker-ps" bash -c "docker ps"
+check "log-exists" bash -c "ls /tmp/dockerd.log"
+check "log-for-completion" bash -c "cat /tmp/dockerd.log | grep 'Daemon has completed initialization'"
+check "log-contents" bash -c "cat /tmp/dockerd.log | grep 'API listen on /var/run/docker.sock'"
+
+# Report result
+reportResults

test/docker-in-docker/scenarios.json

@@ -260,12 +260,24 @@
         "features": {
             "docker-in-docker": {
                 "version": "latest",
-                "moby": "false"
+                "moby": "false",
+                "iptablesSwitchAtRuntime": true
             }
         },
         "remoteUser": "vscode",
         "onCreateCommand": "docker ps && sleep 5s && docker ps"
     },
+    // DO NOT REMOVE: This scenario is used by the docker-in-docker-stress-test workflow
+    "docker_stress_iptables_runtime": {
+        "image": "mcr.microsoft.com/devcontainers/base:noble",
+        "features": {
+            "docker-in-docker": {
+                "version": "latest",
+                "moby": "false",
+                "iptablesSwitchAtRuntime": true
+            }
+        }
+    },
     "azure_linux": {
         "image": "mcr.microsoft.com/azurelinux/base/core:3.0",
         "features": {