inno-devops-labs · Kamilya05 · Feb 6, 2026 · Mar 27, 2026
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+## Goal
+What does this PR accomplish
+
+## Changes
+- Item 1
+- Item 2
+
+## Testing
+How was it verified
+
+## Checklist
+- [ ] Clear, descriptive PR title
+- [ ] Documentation updated if needed
+- [ ] No secrets or large temporary files committed
diff --git a/labs/image-1.png b/labs/image-1.png
diff --git a/labs/image.png b/labs/image.png
diff --git a/labs/submission8.md b/labs/submission8.md
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+# Lab 8 — Site Reliability Engineering (SRE)
+
+**Student:** Kamilya Shakirova
+**Date:** 21-03-2026
+
+
+---
+
+## Task 1 — Key Metrics for SRE and System Analysis
+
+- [x] Top 3 most consuming applications for CPU, memory, and I/O usage
+- [x] Command outputs showing resource consumption
+- [x] Top 3 largest files in the `/var` directory
+- [x] Analysis: What patterns do you observe in resource utilization?
+- [x] Reflection: How would you optimize resource usage based on your findings?
+
+### 1.1 Monitor System Resources
+
+1. **Install Monitoring Tools (if needed):**
+
+```bash
+kamilya@Kama:/mnt/d/Programs/DevOps-Intro$ sudo apt install htop sysstat -y
+[sudo] password for kamilya: 
+Reading package lists... Done
+Building dependency tree... Done
+Reading state information... Done
+htop is already the newest version (3.0.5-7build2).
+htop set to manually installed.
+The following additional packages will be installed:
+  libsensors-config libsensors5
+Suggested packages:
+  lm-sensors isag
+The following NEW packages will be installed:
+  libsensors-config libsensors5 sysstat
+0 upgraded, 3 newly installed, 0 to remove and 61 not upgraded.
+Need to get 519 kB of archives.
+After this operation, 1649 kB of additional disk space will be used.
+Get:1 http://archive.ubuntu.com/ubuntu jammy/main amd64 libsensors-config all 1:3.6.0-7ubuntu1 [5274 B]
+Get:2 http://archive.ubuntu.com/ubuntu jammy/main amd64 libsensors5 amd64 1:3.6.0-7ubuntu1 [26.3 kB]
+Get:3 http://archive.ubuntu.com/ubuntu jammy-updates/main amd64 sysstat amd64 12.5.2-2ubuntu0.2 [487 kB]
+Fetched 519 kB in 2s (212 kB/s)   
+debconf: unable to initialize frontend: Dialog
+debconf: (Dialog frontend requires a screen at least 13 lines tall and 31 columns wide.)
+debconf: falling back to frontend: Readline
+Preconfiguring packages ...
+Selecting previously unselected package libsensors-config.
+(Reading database ... 32117 files and directories currently installed.)                                                                                                     
+Preparing to unpack .../libsensors-config_1%3a3.6.0-7ubuntu1_all.deb ...                                                                                                    
+Unpacking libsensors-config (1:3.6.0-7ubuntu1) ...                                                                                                                          
+Selecting previously unselected package libsensors5:amd64.                                                                                                                  
+Preparing to unpack .../libsensors5_1%3a3.6.0-7ubuntu1_amd64.deb ...                                                                                                        
+Unpacking libsensors5:amd64 (1:3.6.0-7ubuntu1) ...                                                                                                                          
+Selecting previously unselected package sysstat.                                                                                                                            
+Preparing to unpack .../sysstat_12.5.2-2ubuntu0.2_amd64.deb ...                                                                                                             
+Unpacking sysstat (12.5.2-2ubuntu0.2) ...                                                                                                                                   
+Setting up libsensors-config (1:3.6.0-7ubuntu1) ...                                                                                                                         
+Setting up libsensors5:amd64 (1:3.6.0-7ubuntu1) ...                                                                                                                         
+Setting up sysstat (12.5.2-2ubuntu0.2) ...                                                                                                                                  
+debconf: unable to initialize frontend: Dialog                                                                                                                              
+debconf: (Dialog frontend requires a screen at least 13 lines tall and 31 columns wide.)                                                                                    
+debconf: falling back to frontend: Readline                                                                                                                                 
+
+Creating config file /etc/default/sysstat with new version                                                                                                                  
+update-alternatives: using /usr/bin/sar.sysstat to provide /usr/bin/sar (sar) in auto mode                                                                                  
+Created symlink /etc/systemd/system/sysstat.service.wants/sysstat-collect.timer → /lib/systemd/system/sysstat-collect.timer.                                                
+Created symlink /etc/systemd/system/sysstat.service.wants/sysstat-summary.timer → /lib/systemd/system/sysstat-summary.timer.                                                
+Created symlink /etc/systemd/system/multi-user.target.wants/sysstat.service → /lib/systemd/system/sysstat.service.                                                          
+Processing triggers for man-db (2.10.2-1) ...                                                                                                                               
+Processing triggers for libc-bin (2.35-0ubuntu3.11) ...  
+```
+
+2. **Monitor CPU, Memory, and I/O Usage:**
+
+htop
+![alt text](image.png)
+
+iostat -x 1 5
+![alt text](image-1.png)
+
+<details>
+<summary>🔍 Understanding iostat output</summary>
+
+- `%user`: CPU time in user space
+- `%system`: CPU time in kernel space
+- `%iowait`: CPU waiting for I/O operations
+- `%idle`: CPU idle time
+
+</details>
+
+3. **Identify Top Resource Consumers:**
+
+Find the top 3 most consuming applications for:
+- **CPU usage**
+- **Memory usage**
+- **I/O usage**
+
+### 1.2 Disk Space Management
+
+1. **Check Disk Usage:**
+
+```bash
+df -h
+du -h /var | sort -rh | head -n 10
+```
+
+2. **Identify Largest Files:**
+
+```bash
+sudo find /var -type f -exec du -h {} + | sort -rh | head -n 3
+```
+
+
+### Analysis
+#### What patterns do you observe in resource utilization?
+
+
+### Reflection
+#### How would you optimize resource usage based on your findings?
+
+
+
+
+---
+
+## Task 2 — Practical Website Monitoring Setup
+
+- Website URL you chose to monitor
+- Screenshots of browser check configuration
+- Screenshots of successful check results
+- Screenshots of alert settings
+- Analysis: Why did you choose these specific checks and thresholds?
+- Reflection: How does this monitoring setup help maintain website reliability?
+
+### 2.1 Choose Your Website
+
+1. **Select Target Website:**
+
+   Pick ANY public website you want to monitor (e.g., your favorite store, news site, or portfolio)
+
+### 2.2 Create Checks in Checkly
+
+1. **Sign Up:**
+
+   - Create a free account at [Checkly](https://checklyhq.com/)
+
+2. **Create API Check for Basic Availability:**
+
+   <details>
+   <summary>💡 What to configure</summary>
+
+   - **URL:** Your chosen website
+   - **Assertion:** Status code is 200
+   - **Frequency:** Choose appropriate check interval
+
+   </details>
+
+3. **Create Browser Check for Content & Interactions:**
+
+   <details>
+   <summary>💡 What to test</summary>
+
+   Examples of what you can check:
+   - Is a specific text/element visible on the page?
+   - Does a button click work?
+   - How long does page load take?
+   - Can you fill out a form?
+
+   Choose checks that make sense for your selected website.
+
+   </details>
+
+### 2.3 Set Up Alerts
+
+1. **Configure Alert Rules:**
+
+   Design alert rules of YOUR choice:
+   - What to alert on? (e.g., failed checks, slow latency, downtime)
+   - How to be notified? (email, Telegram, Slack, etc.)
+   - Set thresholds that make sense for your site
+
+### 2.4 Capture Proof & Documentation
+
+1. **Run Checks Manually:**
+
+   - Verify all checks work correctly
+   - Observe the monitoring dashboard
+
+2. **Take Screenshots:**
+
+   Capture screenshots showing:
+   - Your browser check configuration
+   - A successful check result
+   - Your alert settings
+   - Dashboard overview
+
+### Analysis
+#### Why did you choose these specific checks and thresholds?
+
+
+### Reflection
+#### How does this monitoring setup help maintain website reliability?