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You have been monitoring your company applications running in Oracle Cloud Infra-structure (OCI) and notice that the application is using OCI Traffic Management service. This service uses a traffic steering policy to distribute the DNS traffic based on subnet addresses in a rule set. Which steering policy is in use in this particular case? (Choose the best answer.)
Which of the following THREE statements are true about Versioning? (Choose three.)
Recently, your e-commerce web application has been receiving significantly more traffic than usual. Users are reporting they often encounter a 503 Service Error when trying to access your site. Sometimes the site is very slow. You check your instance pool configuration to con-firm that the maximum number of instances is configured to allow 20 compute instances. Currently, 14 compute instances have been provisioned by the instance pool. You also confirm that current CPU utilization across all hosts exceeds the scale-out threshold you set in your auto-scaling policy. However, the instance pool is not provisioning any new instances. What can you check to determine why the application is NOT functioning properly? (Choose the best answer.)
Scenario: 2 (Oracle Cloud-init and AutoScaling: Use cloud-init to Configure Apache on Instances in an Autoscaling Instance Pool)
Scenario Description: (Hands-On Performance Exam Certification)
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.
Pre-Configuration:
To fulfill this requirement, you are provided with the following:
Access to an OCI tenancy, an assigned compartment, and OCI credentials
A VCN Cloud-Init Challenge VCN with an Internet gateway and a public subnet. The security list for the subnet allows ingress via TCP ports 22 and 80 (SSH and HTTP). The route table forwards all egress to the Internet gateway.
Access to the OCI Console
Required IAM policies
An SSH key pair for the compute instance
Public Key https://objectstorage.us-ashburn-1.oraclecloud.com/n/tenancyname/b/PBT_Storage/o/PublicKey.pub
Private Key https://objectstorage.us-ashburn-1.oraclecloud.com/n/tenancyname/b/PBT_Storage/o/PKey.key
Note:Throughout your exam, ensure to use assigned Compartment , User Name , and Region.
Complete the following tasks in the provisioned OCI environment:
Task 1(a): Develop the cloud-init Script:
Task 1(b): Use cloud-init to Configure Apache on Instances in an Autoscaling Instance Pool:
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.
You have created the following JSON file to specify a lifecycle policy for one of your object storage buckets:
How will this policy affect the objects that are stored in the bucket? (Choose the best answer.)
