EC2AutoScaling
EC2 Autoscaling group with CloudWatch Alarms
Creation Date: October 21, 2023
Created By: Yeison Giraldo
đź’» This will Assume that you already have an EC2 Instance running and we will use that instance to create the autoscaling group
1. Click on Instances (running)…
2. Check on your instance
3. Click on Actions
4. Click on Instance settings
5. Click on Attach to Auto Scaling Group
6. Type "Demo-ASG"
7. Click on Attach
8. Click on Auto Scaling Groups
9. Check on a previous ASG or Create a new one
10. Click on Edit
11. Configure group size and click update
12. Click on Automatic scaling
13. Click on Create dynamic scaling policy to add EC2 to the group
14. Select the settings and click create
15. Click on Create dynamic scaling policy
This time we are going to configure when to remove EC2 from ASG
16. Click on highlight
17. Click on Create a CloudWatch alarmÂ
Now we need to create a cloud watch alarm so that it will trigger the autoscaling group
18. Click on Select metric
19. Type "demo"
20. Click on EC2 > By Auto Scaling Group
21. Click on Select metric
22. Type "50"
23. Click on Whenever CPUUtilization is...
24. Click on 5 minutes
25. Click on 1 minute…
26. Click on Next
27. Click on Remove
28. Click on Next
29. Click on Next
30. Click on Create alarm
31. Go back to the policy and Click on CloudWatch alarm
32. Click on Refresh CloudWatch alarm
33. Click on Scaling Alarm…
34. Click on Add
35. Click on Remove…
36. Type "1"
37. Click on Create
38. Click on Demo Step Scaling…
39. Click on EC2 Dashboard
40. Click on Instances (running)…
41. Check on
42. Click on Security
43. Drag highlighted link
44. Click on Security details
45. Click on Security
46. Click on Modify IAM role
47. Click on Choose IAM role
48. Click on SessionManager…
49. Click on Update IAM role
50. Click on i-01af1e2720632d3ad
51. Click on Connect
52. Click on Connect
53. Connect to one of the EC2 instances to run a stress test to activate the ASG
54. Click on highlight
55. Click on Auto Scaling Groups
56. Check on
57. Click on Activity
58. Click on Status…
59. Click on Instances
60. Click on i-01af1e2720632d3ad
61. Click on Monitoring
62. Click on 0…
63. Click on Status…
64. Click on Instances
65. Click on Instances
66. Click on Refresh instances
67. Click on Auto Scaling Groups
68. Click on Demo-ASG
69. Click on Activity
70. Click on Status…
# Congratulation
You have setup and Autoscaling Group using CloudWatch alarms to add and remove instances automatically.