inno-devops-labs · somepatt · Feb 3, 2026 · Feb 3, 2026 · Feb 3, 2026 · Feb 3, 2026
diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
@@ -0,0 +1,20 @@
+## Goal / Purpose
+<!-- What and why -->
+
+## Changes
+- 
+
+## Related issue
+Closes #
+
+## Testing
+- [ ] Unit tests
+- [ ] E2E/Integration
+- [ ] Manual (steps):
+
+## Checklist
+- [ ] Self-review done
+- [ ] CI is green
+- [ ] Tests added/updated (if needed)
+- [ ] Docs updated (if needed)
+- [ ] No secrets/credentials in code or logs
diff --git a/.github/workflows/github-actions-demo.yml b/.github/workflows/github-actions-demo.yml
@@ -0,0 +1,34 @@
+name: GitHub Actions Demo
+run-name: ${{ github.actor }} is testing out GitHub Actions 🚀
+on: [push, workflow_dispatch]
+jobs:
+  Explore-GitHub-Actions:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "🎉 The job was automatically triggered by a ${{ github.event_name }} event."
+      - run: echo "🐧 This job is now running on a ${{ runner.os }} server hosted by GitHub!"
+      - run: echo "🔎 The name of your branch is ${{ github.ref }} and your repository is ${{ github.repository }}."
+      - name: Collect System Information
+        run: |
+          echo "=== System Information ==="
+          uname -a
+          echo ""
+          echo "=== CPU Information ==="
+          lscpu
+          echo ""
+          echo "=== Memory Information ==="
+          free -h
+          echo ""
+          echo "=== Disk Space ==="
+          df -h
+          echo ""
+          echo "=== Environment Variables ==="
+          printenv | grep RUNNER
+      - name: Check out repository code
+        uses: actions/checkout@v5
+      - run: echo "💡 The ${{ github.repository }} repository has been cloned to the runner."
+      - run: echo "🖥️ The workflow is now ready to test your code on the runner."
+      - name: List files in the repository
+        run: |
+          ls ${{ github.workspace }}
+      - run: echo "🍏 This job's status is ${{ job.status }}."
diff --git a/current-state.txt b/current-state.txt
diff --git a/desired-state.txt b/desired-state.txt
diff --git a/health.log b/health.log
@@ -0,0 +1,19 @@
+Sun Mar 15 00:51:38 MSK 2026 - ✅ OK: States synchronized
+Sun Mar 15 00:51:53 MSK 2026 - ❌ CRITICAL: State mismatch detected!
+  Desired MD5: 71a29f10311a1948c950c6f5528a5937
+  Current MD5: 6ed6f9d4d12daea40d2144e2e22f1914
+Sun Mar 15 00:52:13 MSK 2026 - ✅ OK: States synchronized
+Sun Mar 15 00:52:47 MSK 2026 - ✅ OK: States synchronized
+Sun Mar 15 00:52:50 MSK 2026 - ✅ OK: States synchronized
+Sun Mar 15 00:52:53 MSK 2026 - ❌ CRITICAL: State mismatch detected!
+  Desired MD5: 71a29f10311a1948c950c6f5528a5937
+  Current MD5: 0d39e77fb04dc93d4c2379569d2491bd
+Sun Mar 15 00:52:57 MSK 2026 - ✅ OK: States synchronized
+Sun Mar 15 00:53:00 MSK 2026 - ✅ OK: States synchronized
+Sun Mar 15 00:53:03 MSK 2026 - ❌ CRITICAL: State mismatch detected!
+  Desired MD5: 71a29f10311a1948c950c6f5528a5937
+  Current MD5: 0d39e77fb04dc93d4c2379569d2491bd
+Sun Mar 15 00:53:06 MSK 2026 - ✅ OK: States synchronized
+Sun Mar 15 00:53:09 MSK 2026 - ✅ OK: States synchronized
+Sun Mar 15 00:53:12 MSK 2026 - ✅ OK: States synchronized
+Sun Mar 15 00:53:15 MSK 2026 - ✅ OK: States synchronized
diff --git a/healthcheck.sh b/healthcheck.sh
@@ -0,0 +1,10 @@
+DESIRED_MD5=$(md5sum desired-state.txt | awk '{print $1}')
+CURRENT_MD5=$(md5sum current-state.txt | awk '{print $1}')
+
+if [ "$DESIRED_MD5" != "$CURRENT_MD5" ]; then
+    echo "$(date) - ❌ CRITICAL: State mismatch detected!" | tee -a health.log
+    echo "  Desired MD5: $DESIRED_MD5" | tee -a health.log
+    echo "  Current MD5: $CURRENT_MD5" | tee -a health.log
+else
+    echo "$(date) - ✅ OK: States synchronized" | tee -a health.log
+fi
diff --git a/labs/image-1.png b/labs/image-1.png
diff --git a/labs/image-2.png b/labs/image-2.png
diff --git a/labs/image-3.png b/labs/image-3.png
diff --git a/labs/image.png b/labs/image.png
diff --git a/labs/submission1.md b/labs/submission1.md
@@ -0,0 +1,5 @@
+1) Подпись коммитов очень важно в разработке, так как подтверждает, что конкретный разработчик внес изменение, ведь автора коммита можно подделать указав определенные данные. Поэтому именно подпись указывает на достоверный коммит. 
+
+2) Подпись коммитов в DevOps особенно важна, потому что она криптографически подтверждает, кто внёс изменения и что коммит не был подменён, повышая доверие к коду, который проходит через CI/CD.
+
+![alt text](image.png)
diff --git a/labs/submission7.md b/labs/submission7.md
@@ -0,0 +1,107 @@
+# Task1 
+
+![alt text](image-1.png)
+![alt text](image-2.png)
+![alt text](image-3.png)
+
+somepatt@DESKTOP-NG99BTO:/mnt/c/Users/Mi/Desktop/projects/DevOps-Intro$ echo "replicas: 5" >> current-state.txt
+somepatt@DESKTOP-NG99BTO:/mnt/c/Users/Mi/Desktop/projects/DevOps-Intro$ diff desired-state.txt current-state.txt
+Binary files desired-state.txt and current-state.txt differ
+somepatt@DESKTOP-NG99BTO:/mnt/c/Users/Mi/Desktop/projects/DevOps-Intro$ ./reconcile.sh
+./reconcile.sh: line 1: warning: command substitution: ignored null byte in input
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:39:58 MSK 2026 - ⚠️  DRIFT DETECTED!
+Reconciling current state with desired state...
+Sun Mar 15 00:39:58 MSK 2026 - ✅ Reconciliation complete
+
+Reconciliation loop помогает откатывать изменения в конфиге к изначальному состоянию. Это очень полезно, если кто-то меняет конфиг руками, то есть вероятность, что сервер может упасть из-за изменения, поэтому этот цикл каждые N секунд/минут сбрасывает конфиг до изначального рабочего состояния.
+
+Декларативный конфиг имеет преимущество, так как мы не диктуем системе шаги, которые нужно предпринять, а говорим ей, то, что должно получиться в итоге. В отличие от декларативного конфига, императивный требует описание шагов, и в случае ошибки на k-ом шаге, система не знает, что должно быть дальше и все ломается
+
+
+# Task2 
+
+somepatt@DESKTOP-NG99BTO:/mnt/c/Users/Mi/Desktop/projects/DevOps-Intro$ ./healthcheck.sh
+Sun Mar 15 00:51:38 MSK 2026 - ✅ OK: States synchronized
+somepatt@DESKTOP-NG99BTO:/mnt/c/Users/Mi/Desktop/projects/DevOps-Intro$ cat health.log
+Sun Mar 15 00:51:38 MSK 2026 - ✅ OK: States synchronized
+somepatt@DESKTOP-NG99BTO:/mnt/c/Users/Mi/Desktop/projects/DevOps-Intro$ echo "unapproved-change: true" >> current-state.txt
+somepatt@DESKTOP-NG99BTO:/mnt/c/Users/Mi/Desktop/projects/DevOps-Intro$ cat health.log
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:52:09 MSK 2026 - ⚠️  DRIFT DETECTED!
+Reconciling current state with desired state...
+Sun Mar 15 00:52:09 MSK 2026 - ✅ Reconciliation complete
+somepatt@DESKTOP-NG99BTO:/mnt/c/Users/Mi/Desktop/projects/DevOps-Intro$ ./healthcheck.sh
+Sun Mar 15 00:52:13 MSK 2026 - ✅ OK: States synchronized
+somepatt@DESKTOP-NG99BTO:/mnt/c/Users/Mi/Desktop/projects/DevOps-Intro$ cat health.log
+Sun Mar 15 00:51:38 MSK 2026 - ✅ OK: States synchronized
+Sun Mar 15 00:51:53 MSK 2026 - ❌ CRITICAL: State mismatch detected!
+  Desired MD5: 71a29f10311a1948c950c6f5528a5937
+  Current MD5: 6ed6f9d4d12daea40d2144e2e22f1914
+Sun Mar 15 00:52:13 MSK 2026 - ✅ OK: States synchronized
+somepatt@DESKTOP-NG99BTO:/mnt/c/Users/Mi/Desktop/projects/DevOps-Intro$ chmod +x monitor.sh                  
+somepatt@DESKTOP-NG99BTO:/mnt/c/Users/Mi/Desktop/projects/DevOps-Intro$ ./monitor.sh
+Starting GitOps monitoring...
+\n--- Check #1 ---
+Sun Mar 15 00:52:47 MSK 2026 - ✅ OK: States synchronized
+./reconcile.sh: line 1: warning: command substitution: ignored null byte in input
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:52:47 MSK 2026 - ✅ States synchronized
+\n--- Check #2 ---
+Sun Mar 15 00:52:50 MSK 2026 - ✅ OK: States synchronized
+./reconcile.sh: line 1: warning: command substitution: ignored null byte in input
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:52:50 MSK 2026 - ✅ States synchronized
+\n--- Check #3 ---
+Sun Mar 15 00:52:53 MSK 2026 - ❌ CRITICAL: State mismatch detected!
+  Desired MD5: 71a29f10311a1948c950c6f5528a5937
+  Current MD5: 0d39e77fb04dc93d4c2379569d2491bd
+./reconcile.sh: line 1: warning: command substitution: ignored null byte in input
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:52:54 MSK 2026 - ⚠️  DRIFT DETECTED!
+Reconciling current state with desired state...
+Sun Mar 15 00:52:54 MSK 2026 - ✅ Reconciliation complete
+\n--- Check #4 ---
+Sun Mar 15 00:52:57 MSK 2026 - ✅ OK: States synchronized
+./reconcile.sh: line 1: warning: command substitution: ignored null byte in input
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:52:57 MSK 2026 - ✅ States synchronized
+\n--- Check #5 ---
+Sun Mar 15 00:53:00 MSK 2026 - ✅ OK: States synchronized
+./reconcile.sh: line 1: warning: command substitution: ignored null byte in input
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:53:00 MSK 2026 - ✅ States synchronized
+\n--- Check #6 ---
+Sun Mar 15 00:53:03 MSK 2026 - ❌ CRITICAL: State mismatch detected!
+  Desired MD5: 71a29f10311a1948c950c6f5528a5937
+  Current MD5: 0d39e77fb04dc93d4c2379569d2491bd
+./reconcile.sh: line 1: warning: command substitution: ignored null byte in input
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:53:03 MSK 2026 - ⚠️  DRIFT DETECTED!
+Reconciling current state with desired state...
+Sun Mar 15 00:53:03 MSK 2026 - ✅ Reconciliation complete
+\n--- Check #7 ---
+Sun Mar 15 00:53:06 MSK 2026 - ✅ OK: States synchronized
+./reconcile.sh: line 1: warning: command substitution: ignored null byte in input
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:53:06 MSK 2026 - ✅ States synchronized
+\n--- Check #8 ---
+Sun Mar 15 00:53:09 MSK 2026 - ✅ OK: States synchronized
+./reconcile.sh: line 1: warning: command substitution: ignored null byte in input
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:53:09 MSK 2026 - ✅ States synchronized
+\n--- Check #9 ---
+Sun Mar 15 00:53:12 MSK 2026 - ✅ OK: States synchronized
+./reconcile.sh: line 1: warning: command substitution: ignored null byte in input
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:53:12 MSK 2026 - ✅ States synchronized
+\n--- Check #10 ---
+Sun Mar 15 00:53:15 MSK 2026 - ✅ OK: States synchronized
+./reconcile.sh: line 1: warning: command substitution: ignored null byte in input
+./reconcile.sh: line 2: warning: command substitution: ignored null byte in input
+Sun Mar 15 00:53:15 MSK 2026 - ✅ States synchronized
+
+
+Мы сохраняем изначально состояние файла определенным хэшем. Любое измененый файл будет иметь уже другой хэш. Поэтому удобно сравнивать изменения не целыми файлами, а только хэшами.
+
+Checksums - это механизм, а ArgoCD's "Sync Status" интерфейс, благодаря которому удобно пользоваться этим алгоритмом. Этот интерфейс удобно показывает результат сравнения хэшей.
diff --git a/monitor.sh b/monitor.sh
@@ -0,0 +1,7 @@
+echo "Starting GitOps monitoring..."
+for i in {1..10}; do
+    echo "\n--- Check #$i ---"
+    ./healthcheck.sh
+    ./reconcile.sh
+    sleep 3
+done
diff --git a/reconcile.sh b/reconcile.sh
@@ -0,0 +1,11 @@
+DESIRED=$(cat desired-state.txt)
+CURRENT=$(cat current-state.txt)
+
+if [ "$DESIRED" != "$CURRENT" ]; then
+    echo "$(date) - ⚠️  DRIFT DETECTED!"
+    echo "Reconciling current state with desired state..."
+    cp desired-state.txt current-state.txt
+    echo "$(date) - ✅ Reconciliation complete"
+else
+    echo "$(date) - ✅ States synchronized"
+fi