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elasticdog/delete-ami

Last active March 7, 2023 12:19
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Revisions

  1. elasticdog revised this gist Dec 9, 2015. 1 changed file with 62 additions and 17 deletions.
    79 changes: 62 additions & 17 deletions delete-ami
    View file
    Original file line number Diff line number Diff line change
    @@ -28,16 +28,61 @@ die() {
    exit "$st"
    }

    # print this script's usage message to stderr
    usage() {
    cat <<-EOF >&2
    Usage: delete-ami -r REGION -a AMI-ID [-h]
    Deregister the given AMI and delete its root device snapshot
    EOF
    }

    ##### Main

    # check command line arguments
    if [[ -z $1 ]]; then
    printf 'Usage: delete-ami AMI-ID\n'
    printf 'Deregister the given AMI and delete its root device snapshot\n'
    exit 1
    else
    AMI_ID=$1
    # reset all variables that might be set
    region=''
    ami_id=''

    # parse command line options
    while [[ "$1" != '' ]]
    do
    case $1 in
    -r | --region)
    region=$2
    shift
    ;;
    --region=*)
    region=${1#*=}
    ;;
    -a | --ami-id)
    ami_id=$2
    shift
    ;;
    --ami-id=*)
    ami_id=${1#*=}
    ;;
    -h | --help | -\?)
    usage
    exit 0
    ;;
    --*)
    warn "unknown option -- ${1#--}"
    usage
    exit 1
    ;;
    *)
    warn "unknown option -- ${1#-}"
    usage
    exit 1
    ;;
    esac
    shift
    done

    # check for required command line options
    if [[ ! $region ]]; then
    die 1 "option '--region=REGION' not given; see --help"
    elif [[ ! $ami_id ]]; then
    die 1 "option '--ami-id=AMI_ID' not given; see --help"
    fi

    # check for dependencies
    @@ -47,24 +92,24 @@ for cmd in {aws,jq}; do
    fi
    done

    AMI_DESCRIPTION=$(aws ec2 describe-images --image-ids "$AMI_ID" 2> /dev/null)
    AMI_DESCRIPTION=$(aws --region "$region" ec2 describe-images --image-ids "$ami_id" 2> /dev/null)
    if [[ -z $AMI_DESCRIPTION ]]; then
    warn 'unable to find an AMI with the ID "%s"' "$AMI_ID"
    die 1 'run the following command to debug:\n aws ec2 describe-images --image-ids "%s"' "$AMI_ID"
    warn 'unable to find an AMI with the ID "%s"' "$ami_id"
    die 1 'run the following command to debug:\n aws --region %s ec2 describe-images --image-ids "%s"' "$region" "$ami_id"
    fi

    ROOT_DEVICE_NAME=$(printf "$AMI_DESCRIPTION" | jq --raw-output '.[][].RootDeviceName')
    SNAPSHOT_ID=$(printf "$AMI_DESCRIPTION" | jq --raw-output ".[][].BlockDeviceMappings | .[] | select(.DeviceName == \"$ROOT_DEVICE_NAME\") | .Ebs.SnapshotId")
    SNAPSHOT_ID=$(printf "$AMI_DESCRIPTION" | jq --raw-output ".[][].BlockDeviceMappings[] | select(.DeviceName == \"$ROOT_DEVICE_NAME\") | .Ebs.SnapshotId")

    if [[ -z $SNAPSHOT_ID ]]; then
    warn 'unable to find a Snapshot ID for the "%s" root device on %s' "$ROOT_DEVICE_NAME" "$AMI_ID"
    die 1 'run the following command to debug:\n aws ec2 describe-images --image-ids "%s"' "$AMI_ID"
    warn 'unable to find a Snapshot ID for the "%s" root device on %s' "$ROOT_DEVICE_NAME" "$ami_id"
    die 1 'run the following command to debug:\n aws --region %s ec2 describe-images --image-ids "%s"' "$region" "$ami_id"
    else
    if ! aws ec2 deregister-image --image-id "$AMI_ID" > /dev/null; then
    die 'image deregistration failed; run the following command to debug:\n aws ec2 deregister-image --image-id "%s"' "$AMI_ID"
    if ! aws --region "$region" ec2 deregister-image --image-id "$ami_id" > /dev/null; then
    die 'image deregistration failed; run the following command to debug:\n aws --region %s ec2 deregister-image --image-id "%s"' "$region" "$ami_id"
    fi
    if ! aws ec2 delete-snapshot --snapshot-id "$SNAPSHOT_ID" > /dev/null; then
    die 'snapshot deletion failed; run the following command to debug:\n aws ec2 delete-snapshot --snapshot-id "%s"' "$SNAPSHOT_ID"
    if ! aws --region "$region" ec2 delete-snapshot --snapshot-id "$SNAPSHOT_ID" > /dev/null; then
    die 'snapshot deletion failed; run the following command to debug:\n aws --region %s ec2 delete-snapshot --snapshot-id "%s"' "$region" "$SNAPSHOT_ID"
    fi
    fi

  2. elasticdog created this gist Apr 21, 2014.
    71 changes: 71 additions & 0 deletions delete-ami
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,71 @@
    #!/usr/bin/env bash

    #
    # delete-ami
    #
    # A script to deregister an Amazon Machine Image (AMI) and
    # delete its corresponding root device snapshot.
    #

    ##### Functions

    # print a message to stderr
    warn() {
    local fmt="$1"
    shift
    printf "delete-ami: $fmt\n" "$@" >&2
    }

    # print a message to stderr and exit with either
    # the given status or that of the most recent command
    die() {
    local st="$?"
    if [[ "$1" != *[^0-9]* ]]; then
    st="$1"
    shift
    fi
    warn "$@"
    exit "$st"
    }


    ##### Main

    # check command line arguments
    if [[ -z $1 ]]; then
    printf 'Usage: delete-ami AMI-ID\n'
    printf 'Deregister the given AMI and delete its root device snapshot\n'
    exit 1
    else
    AMI_ID=$1
    fi

    # check for dependencies
    for cmd in {aws,jq}; do
    if ! command -v $cmd > /dev/null; then
    die 1 'required command "%s" was not found' "$cmd"
    fi
    done

    AMI_DESCRIPTION=$(aws ec2 describe-images --image-ids "$AMI_ID" 2> /dev/null)
    if [[ -z $AMI_DESCRIPTION ]]; then
    warn 'unable to find an AMI with the ID "%s"' "$AMI_ID"
    die 1 'run the following command to debug:\n aws ec2 describe-images --image-ids "%s"' "$AMI_ID"
    fi

    ROOT_DEVICE_NAME=$(printf "$AMI_DESCRIPTION" | jq --raw-output '.[][].RootDeviceName')
    SNAPSHOT_ID=$(printf "$AMI_DESCRIPTION" | jq --raw-output ".[][].BlockDeviceMappings | .[] | select(.DeviceName == \"$ROOT_DEVICE_NAME\") | .Ebs.SnapshotId")

    if [[ -z $SNAPSHOT_ID ]]; then
    warn 'unable to find a Snapshot ID for the "%s" root device on %s' "$ROOT_DEVICE_NAME" "$AMI_ID"
    die 1 'run the following command to debug:\n aws ec2 describe-images --image-ids "%s"' "$AMI_ID"
    else
    if ! aws ec2 deregister-image --image-id "$AMI_ID" > /dev/null; then
    die 'image deregistration failed; run the following command to debug:\n aws ec2 deregister-image --image-id "%s"' "$AMI_ID"
    fi
    if ! aws ec2 delete-snapshot --snapshot-id "$SNAPSHOT_ID" > /dev/null; then
    die 'snapshot deletion failed; run the following command to debug:\n aws ec2 delete-snapshot --snapshot-id "%s"' "$SNAPSHOT_ID"
    fi
    fi

    exit 0