internal/apps: Refactor and add memory-leak app (#2420)

.github/workflows/Makefile

@@ -0,0 +1,11 @@
+SHELL:=/usr/bin/env bash
+
+.PHONY: all
+all: test-apps.yml
+
+.PHONY: clean
+clean:
+	rm -rf test-apps.yml
+
+test-apps.yml: test-apps.cue
+	cat <(echo "# Code generated via \`make test-apps.yml\`; DO NOT EDIT.") <(cue export --out=yaml $<) > $@

.github/workflows/test-apps-schedule.yml

@@ -0,0 +1,22 @@
+# See /internal/apps/README.md for more information.
+name: "Test Apps Schedule"
+on:
+  workflow_dispatch: # manually (just for testing the cron)
+  schedule:
+    - cron: "0 0 * * *" # nightly
+    - cron: "0 0 * * 2" # weekly (tuesdays)
+
+jobs:
+  nightly:
+    if: github.event.schedule == '0 0 * * *'
+    uses: ./.github/workflows/test-apps.yml
+    secrets: inherit
+    with:
+      "arg: scenario_duration": "10m"
+
+  weekly:
+    if: github.event.schedule == '0 0 * * 2'
+    uses: ./.github/workflows/test-apps.yml
+    secrets: inherit
+    with:
+      "arg: scenario_duration": "1h"

.github/workflows/test-apps.cue

@@ -0,0 +1,159 @@
+// See /internal/apps/README.md for more information.
+
+#scenarios: [
+    {
+        name: "unit-of-work/v1",
+    },
+    {
+        name: "unit-of-work/v2",
+    },
+    {
+        name: "memory-leak/goroutine",
+    },
+    {
+        name: "memory-leak/heap",
+    },
+    {
+        name: "memory-leak/goroutine-heap"
+    },
+]
+
+#args: {
+    rps: {
+        env: "DD_TEST_APPS_REQUESTS_PER_SECOND",
+        type: "number",
+        description: "Requests per second",
+        default: 5,
+        pr_default: default,
+    },
+    scenario_duration: {
+        env: "DD_TEST_APPS_TOTAL_DURATION",
+        type: "number",
+        description: "Scenario duration",
+        default: "10m",
+        pr_default: "60s",
+    },
+    profile_period: {
+        env: "DD_TEST_APPS_PROFILE_PERIOD",
+        type: "number",
+        description: "Profile period",
+        default: "60s",
+        pr_default: "10s",
+    },
+}
+
+#envs: [
+    {
+        name: "prod",
+        site: "datadoghq.com",
+        key: "DD_TEST_APP_API_KEY",
+    },
+    {
+        name: "staging",
+        site: "datad0g.com",
+        key: "DD_TEST_AND_DEMO_API_KEY",
+    },
+]
+
+#inputs: {
+    inputs: {
+        [string]: _,
+
+        for env in #envs {
+            "env: \(env.name)": {
+                type: "boolean",
+                default: true,
+            },
+        }
+
+        for name, arg in #args {
+            "arg: \(name)": {
+                type: arg.type,
+                default: arg.default,
+                description: arg.description,
+            },
+        }
+
+        for scenario in #scenarios {
+            "scenario: \(scenario.name)": {
+                type: "boolean",
+                default: true | false,
+            }
+        }
+
+    }
+}
+
+name: "Test Apps"
+on: {
+    // used by nightly cron schedule triggers
+    workflow_call: #inputs & {
+        inputs: {
+            [=~ "scenario:"]: {default: true},
+            ref: {
+                description: "The branch to run the workflow on",
+                required: true,
+                type: "string",
+            },
+        } 
+    },
+
+    // used for manual triggering
+    workflow_dispatch: #inputs & {
+        inputs: {[=~ "scenario:"]: {default: false}}
+    }
+}
+
+env: {
+  DD_ENV: "github",
+  DD_TAGS: "github_run_id:${{ github.run_id }} github_run_number:${{ github.run_number }}",
+}
+
+jobs: {
+    for i, scenario in #scenarios {
+        for j, env in #envs {
+            "job-\(i)-\(j)": {
+                name: "\(scenario.name) (\(env.name))",
+                "runs-on": "ubuntu-latest",
+
+                #if_scenario: "inputs['scenario: \(scenario.name)']",
+                #if_env: "inputs['env: \(env.name)']",
+
+                if: "\(#if_scenario) && \(#if_env)"
+                steps: [
+                    {
+                        name: "Checkout Code",
+                        uses: "actions/checkout@v3",
+                        with: {ref: "${{ inputs.ref || github.ref }}"},
+                    },
+                    {
+                        name: "Start Agent",
+                        uses: "datadog/[email protected]",
+                        with: {
+                            api_key: "${{ secrets['\(env.key)'] }}",
+                            datadog_site: "\(env.site)",
+                        },
+                    },
+                    {
+                        name: "Setup Go"
+                        uses: "actions/setup-go@v3",
+                        with: {
+                            "go-version": "stable",
+                            "check-latest": true,
+                            cache: true,
+                        },
+                    },
+                    {
+                        name: "Run Scenario"
+                        env: {
+                            for name, arg in #args {
+                                "\(arg.env)": "${{ inputs['arg: \(name)'] || '\(arg.pr_default)' }}",
+                            }
+                        },
+                        run: "cd ./internal/apps && ./run-scenario.bash '\(scenario.name)'"
+                    },
+                ]
+            }
+        },
+    },
+}