Add a couple of exercises (bregman-arie#214)

Also fixed the link for kubernetes exercises.

Author: Arie Bregman

README.md

@@ -2,7 +2,7 @@
 
 :information_source:  This repo contains questions and exercises on various technical topics, sometimes related to DevOps and SRE
 
-:bar_chart:  There are currently **2138** exercises and questions
+:bar_chart:  There are currently **2292** exercises and questions
 
 :books:  To learn more about DevOps and SRE, check the resources in [devops-resources](https://github.com/bregman-arie/devops-resources) repository
 
@@ -33,7 +33,7 @@
     <td align="center"><a href="#python"><img src="images/python.png" width="80px;" height="75px;" alt="Python"/><br /><b>Python</b></a></td>
     <td align="center"><a href="#go"><img src="images/Go.png" width="75px;" height="75px;" alt="go"/><br /><b>Go</b></a></td>
     <td align="center"><a href="exercises/shell/README.md"><img src="images/bash.png" width="70px;" height="75px;" alt="Bash"/><br /><b>Shell Scripting</b></a></td>
-    <td align="center"><a href="#kubernetes"><img src="images/kubernetes.png" width="75px;" height="75px;" alt="kubernetes"/><br /><b>Kubernetes</b></a></td>
+    <td align="center"><a href="exercises/kubernetes/README.md"><img src="images/kubernetes.png" width="75px;" height="75px;" alt="kubernetes"/><br /><b>Kubernetes</b></a></td>
     <td align="center"><a href="#prometheus"><img src="images/prometheus.png" width="75px;" height="75px;" alt="Prometheus"/><br /><b>Prometheus</b></a></td>
   </tr>
   <tr>

exercises/aws/ecs_task.md

@@ -0,0 +1,9 @@
+## AWS Containers - Run Tasks
+
+Note: this costs money
+
+### Objectives
+
+Create a task in ECS to launch in Fargate.
+
+The task itself can be a sample app.

exercises/aws/solutions/ecs_task.md

@@ -0,0 +1,26 @@
+## AWS Containers - Run Tasks
+
+Note: this costs money
+
+### Objectives
+
+Create a task in ECS to launch in Fargate.
+
+The task itself can be a sample app.
+
+### Solution
+
+#### Console
+
+1. Go to Elastic Container Service page
+2. Click on "Get Started"
+3. Choose "sample-app"
+4. Verify it's using Farget and not ECS (EC2 Instance) and click on "Next"
+5. Select "None" in Load balancer type and click on "Next"
+6. Insert cluster name (e.g. my_cluster) and click on "Next"
+7. Review everything and click on "Create"
+8. Wait for everything to complete
+
+1. Go to clusters page and check the status of the task (it will take a couple of seconds/minutes before changing to "Running")
+
+1. Click on the task and you'll see the launch type is Fargate

exercises/git/README.md

@@ -1,11 +1,15 @@
-## Git
+# Git
+
+## Exercises
 
 |Name|Topic|Objective & Instructions|Solution|Comments|
 |--------|--------|------|----|----|
 | My first Commit | Commit | [Exercise](exercises/git/commit_01.md) | [Solution](exercises/git/solutions/commit_01_solution.md) | |
 | Time to Branch | Branch | [Exercise](exercises/git/branch_01.md) | [Solution](exercises/git/solutions/branch_01_solution.md) | |
 | Squashing Commits | Commit | [Exercise](exercises/git/squashing_commits.md) | [Solution](exercises/git/solutions/squashing_commits.md) | |
 
+## Questions
+
 <details>
 <summary>How do you know if a certain directory is a git repository?</summary><br><b>
 
@@ -56,6 +60,14 @@ There are different ways to check whether a file is tracked or not:
 <summary>What <code>git status</code> does?</summary><br><b>
 </b></details>
 
+### Branches
+
+<details>
+<summary>True or False? A branch is basically a simple pointer or reference to the head of certain line of work</summary><br><b>
+
+True
+</b></details>
+
 <details>
 <summary>You have two branches - main and devel. How do you make sure devel is in sync with main?</summary><br><b>
 
@@ -67,10 +79,28 @@ git merge main
 ```
 </b></details>
 
-#### Git - Merge
+<details>
+<summary>Describe shortly what happens behind the scenes when you run <code>git branch <BRANCH></code></summary><br><b>
+
+Git runs update-ref to add the SHA-1 of the last commit of the branch you're on into the new branch you would like to create
+</b></details>
+
+<details>
+<summary>When you run <code>git branch <BRANCH></code> how does Git know the SHA-1 of the last commit?</summary><br><b>
+
+Using the HEAD file: `.git/HEAD`
+</b></details>
+
+<details>
+<summary>True or False? when you <code>git checkout some_branch</code>, Git updates .git/HEAD to <code>/refs/heads/some_branch</code></summary><br><b>
+
+True
+</b></details>
+
+### Merge
 
 <details>
-<summary>You have two branches - main and devel. How do you put devel into main?</summary><br><b>
+<summary>You have two branches - main and devel. How do you merge devel into main?</summary><br><b>
 
 git checkout main
 git merge devel
@@ -125,7 +155,7 @@ is currently pointing at.
 </p>
 </b></details>
 
-#### Git - Rebase
+### Rebase
 
 <details>
 <summary>You would like to move forth commit to the top. How would you achieve that?</summary><br><b>
@@ -198,3 +228,11 @@ If you would like to also discard the changes you `git reset --hard``
 
 False. If you would like to keep a file on your filesystem, use `git reset <file_name>`
 </b></details>
+
+## References
+
+<details>
+<summary>How to list the current git references in a given repository? </summary><br><b>
+
+`find .git/refs/`
+</b></details>