Make the test fail

section_4/code/cd_pipeline/Jenkinsfile

@@ -100,7 +100,8 @@ def approve() {
 
 
 def runUnittests() {
-	sh "python section_4/code/cd_pipeline/tests/test_flask_app.py"
+	sh "pip3 install --no-cache-dir -r ./section_4/code/cd_pipeline/requirements.txt"
+	sh "python3 section_4/code/cd_pipeline/tests/test_flask_app.py"
 }
 
 

section_4/code/cd_pipeline/Jenkinsfile_part_2

@@ -36,7 +36,6 @@ pipeline {
 		stage("Test - UAT Stage") {
 			steps { runUAT(88) }
 		}
-
 	}
 }
 
@@ -69,12 +68,12 @@ def deploy(environment) {
 	sh "docker ps -f name=${containerName} -q | xargs --no-run-if-empty docker stop"
 	sh "docker ps -a -f name=${containerName} -q | xargs -r docker rm"
 	sh "docker run -d -p ${port}:5000 --name ${containerName} hands-on-jenkins/myapp:${BUILD_NUMBER}"
-
 }
 
 
 def runUnittests() {
-	sh "python section_4/code/cd_pipeline/tests/test_flask_app.py"
+	sh "pip3 install --no-cache-dir -r ./section_4/code/cd_pipeline/requirements.txt"
+	sh "python3 section_4/code/cd_pipeline/tests/test_flask_app.py"
 }
 
 

section_4/code/cd_pipeline/app.py

@@ -5,18 +5,18 @@
 
 # list of cat images
 images = [
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr05/15/9/anigif_enhanced-buzz-26388-1381844103-11.gif",
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr01/15/9/anigif_enhanced-buzz-31540-1381844535-8.gif",
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr05/15/9/anigif_enhanced-buzz-26390-1381844163-18.gif",
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr06/15/10/anigif_enhanced-buzz-1376-1381846217-0.gif",
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr03/15/9/anigif_enhanced-buzz-3391-1381844336-26.gif",
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr06/15/10/anigif_enhanced-buzz-29111-1381845968-0.gif",
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr03/15/9/anigif_enhanced-buzz-3409-1381844582-13.gif",
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr02/15/9/anigif_enhanced-buzz-19667-1381844937-10.gif",
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr05/15/9/anigif_enhanced-buzz-26358-1381845043-13.gif",
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr06/15/9/anigif_enhanced-buzz-18774-1381844645-6.gif",
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr06/15/9/anigif_enhanced-buzz-25158-1381844793-0.gif",
-    "http://ak-hdl.buzzfed.com/static/2013-10/enhanced/webdr03/15/10/anigif_enhanced-buzz-11980-1381846269-1.gif"
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-26383-1381845104-25.gif",
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-26358-1381845043-13.gif",
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-25329-1381845415-0.gif",
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-23859-1381845509-0.gif",
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-19708-1381845008-7.gif",
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-19667-1381844937-10.gif",
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-3409-1381844582-13.gif",
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-3391-1381844336-26.gif",
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-1376-1381846217-0.gif",
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-26390-1381844163-18.gif",
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-26388-1381844103-11.gif",
+    "http://www.catshaming.co.uk/wp-content/uploads/2014/11/anigif_enhanced-buzz-27162-1381845360-0.gif"
 ]
 
 @app.route('/')

section_4/code/cd_pipeline/requirements.txt

@@ -1 +1 @@
-Flask==0.12.2
+Flask==2.3.2

section_5/exercises/exercises.md

@@ -0,0 +1,18 @@
+## Section 5: Exercises
+
+### Theory
+
+1. Which are the advantages of using Blue Ocean? 
+
+2. Which kind of tasks in Jenkins cannot be done via the Blue Ocean user interface? 
+3. What is a multibranch pipeline?
+
+4. What is a pull request?
+
+### Practice
+
+1. Create a new pipeline with the visual editor but instead of outputting dummy message try to make it do something useful (e.g. build a web application, deploy it on localhost, and ping it). Use your favourite programming language and store the code in your repository on GitHub. 
+
+2. Create a new multibranch pipeline using the Jenkinfile employed in section 4. Make sure to put it at the root of a GitHub repository and use the master branch. 
+
+3. If you have the chance to deploy Jenkins on a domain name or on an IP address, try to replace the polling in Jenkins with a push notification from GitHub. [This link](https://medium.com/@marc_best/trigger-a-jenkins-build-from-a-github-push-b922468ef1ae) explains how to set up a push notification from GitHub to Jenkins. 

section_5/exercises/solutions.md

@@ -0,0 +1,17 @@
+## Section 5: Solutions to Exercises
+
+### Theory
+
+1. These are some advantages of Blue Ocean:
+
+    - Intuitive and visual tool
+    - Easy to use for anyone in the team
+    - Make it easier to debug and pinpoint errors in a pipeline job
+    - Native integration with branches and pull requests for GitHub and Bitbucket
+    - Modern UI and better user experience 
+
+2. Job configuration and Manage Jenkins are two tasks that cannot be accessed via the Blue Ocean user interface and automatically redirect to the classic UI. 
+
+3. A multibranch pipeline is a job that enables to implement different Jenkinsfiles for different branches in the same source control repository.
+
+4. A pull request is a request made by a developer to the code maintainer to pull a source code change.

section_6/code/install_java.sh

@@ -0,0 +1,4 @@
+# install java 1.8 on Amazon Linux 
+sudo yum update -y
+sudo yum install -y java-1.8.0-openjdk-devel 
+sudo alternatives --config java

section_6/code/install_jenkins_on_aws.sh

@@ -0,0 +1,4 @@
+# install Jenkins on Amazon Linux
+sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo
+sudo rpm --import http://pkg.jenkins-ci.org/redhat-stable/jenkins-ci.org.key
+sudo yum install jenkins

section_6/code/policy-jenkins-slave-node.json

@@ -0,0 +1,30 @@
+{
+	"Version": "2012-10-17",
+	"Statement": [
+		{
+			"Sid": "Stmt1312295543082",
+			"Action": [
+				"ec2:DescribeSpotInstanceRequests",
+				"ec2:CancelSpotInstanceRequests",
+				"ec2:GetConsoleOutput",
+				"ec2:RequestSpotInstances",
+				"ec2:RunInstances",
+				"ec2:StartInstances",
+				"ec2:StopInstances",
+				"ec2:TerminateInstances",
+				"ec2:CreateTags",
+				"ec2:DeleteTags",
+				"ec2:DescribeInstances",
+				"ec2:DescribeKeyPairs",
+				"ec2:DescribeRegions",
+				"ec2:DescribeImages",
+				"ec2:DescribeAvailabilityZones",
+				"ec2:DescribeSecurityGroups",
+				"ec2:DescribeSubnets",
+				"iam:PassRole"
+			],
+			"Effect": "Allow",
+			"Resource": "*"
+		}
+	]
+}

section_6/code/ssh_to_ec2_instance.sh

@@ -0,0 +1,4 @@
+# ssh into EC2 instance (replace key name and hostname)  
+ls -lah /path/jenkins-key.pem
+chmod 400 /path/jenkins-key.pem
+ssh -i /path/jenkins-key.pem ec2-user@ec2-123-456-78-9.compute-1.amazonaws.com  

section_6/code/start_jenkins_at_boot_time.sh

@@ -0,0 +1,3 @@
+# start Jenkins at boot time
+sudo systemctl start jenkins.service
+sudo systemctl enable jenkins.service

section_6/exercises/exercises.md

@@ -0,0 +1,20 @@
+## Section 6: Exercises
+
+### Theory
+
+1. What are the benefits of using a master/slave architecture in Jenkins? 
+
+2. What are the differences between a single master and a multi master configuration? 
+
+3. What is a VPC in AWS? 
+
+4. What is a security group in AWS?
+
+5. What is IAM in AWS? What is a IAM policy?
+
+### Practice
+
+1. Create another slave node with a different label name and set up a Jenkins job that runs solely on that node.   
+
+2. Instead of running a dummy job on the slave, make it run something useful (e.g. tests). For example, you could run the web application created in section 4 on an EC2 instance and then use a slave node to run acceptance tests. 
+

section_6/exercises/solutions.md

@@ -0,0 +1,25 @@
+## Section 6: Solutions to Exercises
+
+### Theory
+
+1. The master/slave configuration allows to distribute builds in Jenkins and this has advantages in terms of:
+
+    - Flexibility: the slave nodes can be customized to run specific jobs (for example build and test on a specific browser or operating system). 
+    - Resilience: the performance on the master node is improved as long running and resource consuming jobs are sent to slave nodes. Plus, even if a slave node fails, jobs running on other nodes are not affected. 
+    - Scalability: slave nodes free resources from the master node, allow to run jobs in parallel thus sharing the load across multiple machines, and scale automatically since the number of slave nodes is increased at peak build times and decreased during low activity times.  
+
+2. In a single master configuration Jenkins is deployed on a single, large master with multiple slave nodes connected to it. In a multiple master configuration Jenkins is deployed on multiple smaller masters with multiple slave nodes connected to each other. 
+
+    A single master configuration is easier to maintain and is well suited for a single team whereas the multi master configuration is more robust and is better suited for multiple teams.
+
+3. VPC stands for virtual private cloud  and is an isolated virtual network inside AWS. It is a good security practice to launch AWS resources inside a VPC so that they are isolated from other projects deployed on AWS. 
+
+4. A security group is a virtual firewall for controlling inbound and outbound traffic to resources in a VPC.
+
+5. IAM stands for Identity and Access Management and it enables to access AWS services and resources securely. In particular, IAM is used to create users, permissions, and roles. 
+
+    A IAM policy is a set of permissions usually attached to a user or a resource. IAM policies are expressed and stored as JSON files. 
+
+### Practice
+
+1. To create a new slave node, add a new AMI in `Manage Jenkins` -> `Configure System` -> `Cloud` -> `Amazon EC2` -> `AMIs` -> `Add`. You can copy the same configuration used in video 6.4 but under `Labels` use a different label. Then create a new Jenkins job and in General thick the option `Restrict where this project can be run` and type in `Label expression` the label given to the new slave.