Lionel Tchami lioneltchami

🌸 A.D.A (Apoti Development Association) Vocational Training

Pre-Training Questionnaire

Helping us know you better so we can serve you best.

SECTION 1: PERSONAL INFORMATION

Full Name: _____________________________________________________________

Root Causes of the Cloudflare ↔ Backstage Connectivity Failures

Incorrect DNS Resolution
- Problem: Cloudflare Tunnel tried to reach backstage.backstage-dev (short DNS) but needed the full Kubernetes internal DNS:
  backstage.backstage-dev.svc.cluster.local
- Symptom: i/o timeout errors in Cloudflare logs.
- Fix: Updated Terraform to use the full DNS path:
```
service = "http://backstage.backstage-dev.svc.cluster.local:80"
```

Web Application with Image Upload and Storage

Project Components

VPC Setup
- Create a new VPC with public and private subnets.
- Set up an Internet Gateway for the public subnet.
- Configure appropriate route tables for both subnets.
EC2 Instances

AWS Cloud and DevOps Skills Self-Assessment

Instructions: Rate your proficiency in each skill area using the following scale: 1 - No Knowledge 2 - Basic Understanding 3 - Intermediate Skills 4 - Advanced Proficiency 5 - Expert Level

	resource "awscc_applicationsignals_service_level_objective" "custom_app_latency" {
	name = "custom-app-latency-slo"
	description = "Track app-reported latency (e.g., /health or critical path)"

	sli = {
	comparison_operator = "LessThan"
	metric_threshold = 200 # 200ms

	sli_metric = {
	metric_data_queries = [{

	resource "awscc_applicationsignals_service_level_objective" "task_restart_slo" {
	name = "ecs-task-restart-slo"
	description = "Monitor ECS task restart frequency"

	sli = {
	comparison_operator = "LessThan"
	metric_threshold = 1.0 # 1 or fewer per 5 min

	sli_metric = {
	metric_data_queries = [{

	resource "awscc_applicationsignals_service_level_objective" "cpu_utilization_slo" {
	name = "ecs-cpu-slo"
	description = "Keep ECS CPU Utilization below 80%"

	sli = {
	comparison_operator = "LessThan"
	metric_threshold = 80.0

	sli_metric = {
	metric_data_queries = [{

	resource "awscc_applicationsignals_service_level_objective" "app_error_rate" {
	name = "app-error-rate-slo"
	description = "Application error rate derived from X-Ray segments"

	sli = {
	comparison_operator = "LessThan"
	metric_threshold = 1.0 # <1% errors

	sli_metric = {
	metric_data_queries = [{

	resource "awscc_applicationsignals_service_level_objective" "alb_latency_slo" {
	name = "alb-latency-slo"
	description = "Target response time for ALB in front of ECS Fargate service"

	sli = {
	comparison_operator = "LessThan"
	metric_threshold = 500

	sli_metric = {
	metric_data_queries = [{

	resource "awscc_applicationsignals_service_level_objective" "fargate_latency_slo" {
	name = "ecs-fargate-latency-slo"
	description = "Latency SLO for ECS Fargate service behind ALB"

	sli = {
	comparison_operator = "LessThan"
	metric_threshold = 500 # 500ms latency threshold

	sli_metric = {
	metric_data_queries = [{