Task 1(a): Develop the cloud-init Script:

Create a compute instance pbt_cloud_init_vm_01 with the following properties:

Shape: VM.Standard.A1.Flex instance with 1 OCPU and 6 GB memory

Image: Oracle Linux 8

Placement: Use any of the availability domains

Network:

Place in the public subnet Cloud-Init Challenge SNT

Assign a public IPv4

Use the SSH public key

Add a cloud-init script and perform the following:

Use yum or dnf to install httpd.

Use systemctl to enable and start httpd

Open the firewall to http:

sudo firewall-offline-cmd --add-service=http

systemctl restart firewalld

Mark Complete

Task 1(b): Use cloud-init to Configure Apache on Instances in an Autoscaling Instance Pool:

You're deploying an Apache-based web application on OCI that requires horizontal autoscaling.

To configure instances upon provisioning, write a cloud-init script for Oracle Linux 8 that installs and enables Apache (httpd), and opens the firewall for HTTP on TCP port 80. Create an instance configuration and include the cloud-init script in it. Use this instance configuration to create an instance pool and autoscaling configuration.

Task 2: Create an Autoscaling Instance Pool Including the cloud-init Script:

Create an instance configuration named pbt_cloud_init_config_01 with the following properties:

Shape: VM.Standard.A1.Flex instance with 1 OCPU and 6 GB memory

Image: Oracle Linux 8

Placement: Use any of the availability domains

Network:

Place in the public subnet Cloud-Init Challenge SNT

Assign a public IPv4

Use the SSH public key

Attach the cloud-init script created in Task 1

Create an instance pool named pbt_cloud_init_pool_01 with one instance by using the instance configuration pbt_cloud_init_config_01

Create and attach an autoscaling configuration named pbt_cloud_autoscaling_config_01 with the following settings:

Metric-based autoscaling

Cooldown: 300 second

Performance metric: CPU utilization

Scale-out rule:

Operator: Greater than (>)

Threshold: 75%

Number of instances to add: 1

Scale-in rule:

Operator: Less than (<)

Threshold: 25%

Number of instances to remove: 1

Scaling limits:

Minimum number of instances: 1

Maximum number of instances: 2

Initial number of instances: 1

Task 1: Develop the cloud-init script

In the main menu, go toCompute > Instancesand clickCreate an Instance

In the instance creation menu, enter the following details

a. Name:Provide name given in the instructions

b. Compartment: Use theassigned compartment

c. Placement: Use any of the availability domains

d. Image: Oracle Linux 8

e. Shape: VM.Standard.A1.Flex instance with 1 OCPU and 6 GB memory

f. Network:

i. Place in the public subnet

ii. Assign a public IPv4

g. SSH keys: Upload or paste the provided SSH public key

h. Boot volume:Leave as default

i. Under advanced options, add the following cloud-init script:

#!/bin/shsudo dnf install httpd --assumeyes --quietsudo systemctl enable httpdsudo systemctl start httpdsudo firewall-offline-cmd --add-service=httpsystemctl restart firewalld

j. Create the instance.

Task 2: Create an autoscaling instance pool including the cloud-init script

1. In the main menu, go toCompute>Instance Configurations. ClickCreate instance configuration.

a. In the instance configuration creation menu, enter the same details as before:

b. Name:Provide name given in the instruction/if not specified provide any name

c. Compartment:Assigned compartment

d. Placement: Use any of the availability domains

e. Image: Oracle Linux 8

f. Shape: VM.Standard.A1.Flex instance with 1 OCPU and 6 GB memory

g. Network:

i. Place in the public subnet

ii. Assign a public IPv4

h. SSH keys: Upload or paste the provided SSH public key

i. Boot volume:Leave as default

j. Under advanced options, add the following cloud-init script:

#!/bin/shsudo dnf install httpd --assumeyes --quietsudo systemctl enable httpdsudo systemctl start httpdsudo firewall-offline-cmd --add-service=httpsystemctl restart firewalld

k. Create the instance configuration.

Task 2:In the main menu, go toCompute > Instance Pools. ClickCreate instance pool.

Enter the following details:

a. Name:Provide name given in the instruction/if not specified provide any name

b. Compartment:Assigned compartment

c. Instance configuration: Created in last step

d. Number of instances: 1

e. Select any availability domain

f. Leave fault domain unselected

g. Primary VNIC:Provided VCN in the instructions

h. Subnet:Public subnet

i. Do not attach a load balancer

j. Create the instance pool

Task 3:In the main menu, go toCompute > Autoscaling Configurations. ClickCreate autoscaling configurationand enter the following details:

a. Name:Provide name given in the instruction/if not specified provide any name

b. Compartment:Assigned compartment

c. Instance Pool:Created in last step

d. Select Metric-based autoscaling

e. Autoscaling policy name:Does not matter

f. Cooldown: 300 seconds

g. Performance metric: CPU utilization

h. Scale-out rule:

i. Operator: Greater than (>)

ii. Threshold: 75%

iii. Number of instances to add: 1

i. Scale-in rule:

i. Operator: Less than (<)

ii. Threshold: 25%

iii. Number of instances to remove: 1

j. Scaling limits:

i. Minimum number of instances: 1

ii. Maximum number of instances: 2

iii. Initial number of instances: 1

k. Create the autoscaling configuration.