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oam/knowledge base/cloud computing/aws/ec2.md

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Elastic Compute Cloud

  1. TL;DR
  2. Disks
  3. Further readings
    1. Sources

TL;DR

Use an instance profile to pass an IAM role to an EC2 instance.

Real world use cases 
# Get the IDs of running nginx instances in 'dev'.
aws ec2 describe-instances --output 'text' \
  --query 'Reservations[].Instances[].InstanceId[]'
  --filters \
    'Name=instance-state-name,Values=running' \
    'Name=tag:env,Values=dev' \
    'Name=tag:app,Values=nginx' \

# Start SSM sessions to specific machines.
aws ec2 describe-instances --output text \
  --query 'Reservations[].Instances[].InstanceId' \
  --filters \
    'Name=app,Values=mysql' \
    'Name=instance-state-name,Values=running' \
| xargs -ot aws ssm start-session --target

# Show images details.
aws ec2 describe-images --image-ids 'ami-8b8c57f8'
aws ec2 describe-images --filters \
  'Name=name,Values=["al2023-ami-minimal-*"]' \
  'Name=owner-alias,Values=["amazon"]' \
  'Name=architecture,Values=["arm64","x86_64"]' \
  'Name=block-device-mapping.volume-type,Values=["gp3"]'

# Describe security groups.
aws ec2 describe-security-groups --group-names 'pulumi-workshop'

# Delete security groups.
aws ec2 delete-security-group --group-name 'pulumi-workshop'
aws ec2 delete-security-group --group-id 'sg-0773aa724d0c2dd51'

# Query the onboard IMDSv1 metadata server.
curl 'http://instance-data/latest/meta-data/instance-id'
curl 'http://169.254.169.254/latest/meta-data/instance-type'
curl 'http://[fd00:ec2::254]/latest/meta-data/local-ipv4'

Disks

See EBS.

Further readings

Sources