IT Lab

다음 코드를 사용하면 된다.

def getType(x):

    return {

        0: 'A',

        1: 'B',

        2: 'C'

    }[x]

>>> getType(0)

'A'

ec2에서 sudo pip install이 안되는 경우가 있다.

[ec2-user@ip-172-31-17-194 ~]$ sudo pip install boto3
Traceback (most recent call last):
  File "/usr/bin/pip", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3138, in <module>
    @_call_aside
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3124, in _call_aside
    f(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3151, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 663, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 676, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 849, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==6.1.1' distribution was not found and is required by the application
[ec2-user@ip-172-31-17-194 ~]$ which pip
/usr/local/bin/pip

우와 같이 나오는 경우 경로를 다음과 같이 경로를 수정하면 된다. 

sudo /usr/local/bin/pip

디렉토리 생성

mkdir -pv ~/.vim/ftdetect
mkdir -pv ~/.vim/indent
mkdir -pv ~/.vim/syntax

파일 복사

wget --no-check-certificate https://lampsvn.epfl.ch/trac/scala/export/18260/scala-tool-support/trunk/src/vim/ftdetect/scala.vim -O ~/.vim/ftdetect/scala.vim
wget --no-check-certificate https://lampsvn.epfl.ch/trac/scala/export/18260/scala-tool-support/trunk/src/vim/indent/scala.vim -O ~/.vim/indent/scala.vim
wget --no-check-certificate https://lampsvn.epfl.ch/trac/scala/export/18260/scala-tool-support/trunk/src/vim/syntax/scala.vim -O ~/.vim/syntax/scala.vim

참고 문서: https://blog.outsider.ne.kr/523

ADHOC-JOB으로 시작하는 클러스터 아이디를 뽑아내고 싶다면 쉘에서 다음과 같이 입력하면 클러스터 아이디를 추출할 수 있다.

CLUSTER_ID=`aws emr list-clusters --active --query 'Clusters[?starts_with(Name, \`ADHOC-JOB\`) == \`true\`].Id' | jq .[] | sed -e 's/^"//' -e 's/"$//'`

aws cli 커맨드에서 --query 옵션을 넣으면 JSON결과를 필터링해서 볼 수 있다.

emr CORE 인스턴스중 RUNNING인 인스턴스를 찾고 아이디만 출력하기

$ aws emr list-instances --cluster-id  j-1RFIG3YHLDOXX --instance-group-types CORE --query 'Instances[?Status.State==`RUNNING`].Ec2InstanceId' 
[
  "i-51d9f1xx",
  "i-55d9f1xx",
  "i-085653xx",
  "i-656d67xx",
  "i-1a6d67xx"
]

$ aws emr  list-clusters --active --query 'Clusters[*].[Name,NormalizedInstanceHours]' | jq
[
  [
    "20160825-1135",
    192
  ],
  [
    "20160825-1109",
    448
  ],
  [
    "20160825-1100",
    672
  ]
]

$ aws emr  list-clusters --query 'Clusters[?NormalizedInstanceHours > `1000`].{Name:Name, Time:NormalizedInstanceHours}' | jq '.'
[
  {
    "Name": "20160822-0900",
    "Time": 1632
  },
  {
    "Name": "20160804",
    "Time": 1320
  },
  {
    "Name": "20160804",
    "Time": 1848
  },
  {
    "Name": "20160802-2",
    "Time": 29064
  }
]

기본 커맨드

$ aws ec2 describe-volumes
{
    "Volumes": [
        {
            "AvailabilityZone": "us-west-2a",
            "Attachments": [
                {
                    "AttachTime": "2013-09-17T00:55:03.000Z",
                    "InstanceId": "i-a071c394",
                    "VolumeId": "vol-e11a5288",
                    "State": "attached",
                    "DeleteOnTermination": true,
                    "Device": "/dev/sda1"
                }
            ],
            "VolumeType": "standard",
            "VolumeId": "vol-e11a5288",
            "State": "in-use",
            "SnapshotId": "snap-f23ec1c8",
            "CreateTime": "2013-09-17T00:55:03.000Z",
            "Size": 30
        },
        {
            "AvailabilityZone": "us-west-2a",
            "Attachments": [
                {
                    "AttachTime": "2013-09-18T20:26:16.000Z",
                    "InstanceId": "i-4b41a37c",
                    "VolumeId": "vol-2e410a47",
                    "State": "attached",
                    "DeleteOnTermination": true,
                    "Device": "/dev/sda1"
                }
            ],
            "VolumeType": "standard",
            "VolumeId": "vol-2e410a47",
            "State": "in-use",
            "SnapshotId": "snap-708e8348",
            "CreateTime": "2013-09-18T20:26:15.000Z",
            "Size": 8
        }
    ]
}

다음 조건의 데이터만 나오도록 하기

$ aws ec2 describe-volumes --query 'Volumes[?AvailabilityZone==`us-west-2a`]'

일부 필드만 나오도록 조정하기

$ aws ec2 describe-volumes --query 'Volumes[*].{ID:VolumeId,InstanceId:Attachments[0].InstanceId,AZ:AvailabilityZone,Size:Size}'
[
    {
        "InstanceId": "i-a071c394",
        "AZ": "us-west-2a",
        "ID": "vol-e11a5288",
        "Size": 30
    },
    {
        "InstanceId": "i-4b41a37c",
        "AZ": "us-west-2a",
        "ID": "vol-2e410a47",
        "Size": 8
    }
]

일부 필드와 값만 나오도록 조정하기

$ aws ec2 describe-volumes --query 'Volumes[*].[VolumeId, Attachments[0].InstanceId, AvailabilityZone, Size]'
[
    [
        "vol-e11a5288",
        "i-a071c394",
        "us-west-2a",
        30
    ],
    [
        "vol-2e410a47",
        "i-4b41a37c",
        "us-west-2a",
        8
    ]
]

참고 페이지: 커맨드 결과 제어하기 

http://docs.aws.amazon.com/ko_kr/cli/latest/userguide/controlling-output.html