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MFA認証つきのIAMユーザでaws cliを利用するワンライナーコマンド

Last updated at Posted at 2025-01-22
aws

IAMユーザのARNMFAデバイストークンを用意してワンタイムセッションを確立して作業する

sh
eval `aws sts get-session-token --serial-number {IAMユーザのARN} --token-code {MFAデバイストークン} | awk ' $1 == "\"AccessKeyId\":" { gsub(/\"/,""); gsub(/,/,""); print "export AWS_ACCESS_KEY_ID="$2 } $1 == "\"SecretAccessKey\":" { gsub(/\"/,""); gsub(/,/,""); print "export AWS_SECRET_ACCESS_KEY="$2} $1 == "\"SessionToken\":" { gsub(/\"/,""); gsub(/,/,""); print "export AWS_SESSION_TOKEN="$2 } '`

付録

  • AWS Security Token Service(STS)を使用して、IAMユーザのMFAデバイストークンから一時的な認証情報(Temporary Security Credentials)を取得する
  • 有効期限はデフォルト12時間
sh
aws sts get-session-token --serial-number <IAMユーザのARN> --token-code <MFAデバイストークン>

# 結果
{
    "Credentials": {
        "SecretAccessKey": "secret-access-key",
        "SessionToken": "temporary-session-token",
        "Expiration": "expiration-date-time",
        "AccessKeyId": "access-key-id"
    }
}

認証情報を環境変数にセットする

sh
export AWS_ACCESS_KEY_ID={AccessKeyId}
export AWS_SECRET_ACCESS_KEY={SecretAccessKey}
export AWS_SESSION_TOKEN={SessionToken}
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