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作るのも使うのも、結局は、人なのだ

OSのPython古くて困ってる場合はpyenv入れたら便利だよ

成り行き

運用管理サーバに使ってるCentOS 6で、色々オペレーションをやってるが、ここでaws-cliを使いたい。 aws-cliPython 2.6のサポートを打ち切っていたので、これを機にPython2.7にあげたい。

$ pip install awscli

DEPRECATION: Python 2.6 is no longer supported by the Python core team, please upgrade your Python. A future version of pip will drop support for Python 2.6
The directory '/home/uorat/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/uorat/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Requirement already satisfied (use --upgrade to upgrade): awscli in /usr/lib/python2.6/site-packages
Requirement already satisfied (use --upgrade to upgrade): botocore==1.0.0b1 in /usr/lib/python2.6/site-packages (from awscli)
Requirement already satisfied (use --upgrade to upgrade): bcdoc<0.16.0,>=0.15.0 in /usr/lib/python2.6/site-packages (from awscli)
Requirement already satisfied (use --upgrade to upgrade): colorama<=0.3.3,>=0.2.5 in /usr/lib/python2.6/site-packages (from awscli)
Requirement already satisfied (use --upgrade to upgrade): docutils>=0.10 in /usr/lib/python2.6/site-packages (from awscli)
Requirement already satisfied (use --upgrade to upgrade): rsa<=3.1.4,>=3.1.2 in /usr/lib/python2.6/site-packages (from awscli)
Requirement already satisfied (use --upgrade to upgrade): argparse>=1.1 in /usr/lib/python2.6/site-packages (from awscli)
Requirement already satisfied (use --upgrade to upgrade): jmespath==0.7.1 in /usr/lib/python2.6/site-packages (from botocore==1.0.0b1->awscli)
Requirement already satisfied (use --upgrade to upgrade): python-dateutil<3.0.0,>=2.1 in /usr/lib/python2.6/site-packages (from botocore==1.0.0b1->awscli)
Requirement already satisfied (use --upgrade to upgrade): ordereddict==1.1 in /usr/lib/python2.6/site-packages (from botocore==1.0.0b1->awscli)
Requirement already satisfied (use --upgrade to upgrade): simplejson==3.3.0 in /usr/lib64/python2.6/site-packages (from botocore==1.0.0b1->awscli)
Requirement already satisfied (use --upgrade to upgrade): six<2.0.0,>=1.8.0 in /usr/lib/python2.6/site-packages (from bcdoc<0.16.0,>=0.15.0->awscli)
Requirement already satisfied (use --upgrade to upgrade): pyasn1>=0.1.3 in /usr/lib/python2.6/site-packages (from rsa<=3.1.4,>=3.1.2->awscli)
/usr/lib/python2.6/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:315: SNIMissingWarning: An HTTPS request has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server to present an in
correct TLS certificate, which can cause validation failures. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#snimissingwarning.
  SNIMissingWarning
/usr/lib/python2.6/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:120: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more in
formation, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning

$ python --version
Python 2.6.6

ただ、Pythonは依存関係が多く、単純にバージョン上げるとシステム全体に波及しかねないので、怖い。 Rubyだとrbenvやrvm, Node.jsだとnvm, 最近はこういうパッケージ管理/バージョン管理ツールが充実しており、Pytyonにも pyenv なるものがあることを知ったので、aws-cli使うときはこいつを利用しようという背景。

yyuu/pyenv https://github.com/yyuu/pyenv

pyenvインストール

とってもお手軽。 git cloneして、基本的にはpath通すだけ。

### git cloneしてくる

$ git clone https://github.com/yyuu/pyenv.git ~/.pyenv
Initialized empty Git repository in /home/uorat/.pyenv/.git/
remote: Counting objects: 11999, done.
remote: Compressing objects: 100% (5/5), done.
remote: Total 11999 (delta 0), reused 0 (delta 0), pack-reused 11994
Receiving objects: 100% (11999/11999), 2.12 MiB | 941 KiB/s, done.
Resolving deltas: 100% (8334/8334), done.


### .bashrc/.bash_profile や .zshrc などに必要な変数や処理を追加

# echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bash_profile
# echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bash_profile
# echo 'eval "$(pyenv init -)"' >> ~/.bash_profile

### シェル再起動 (source ~/.bash_profile でも可)

exec $SHELL -l

### 起動確認

$ pyenv help
Usage: pyenv <command> [<args>]

Some useful pyenv commands are:
   commands    List all available pyenv commands
   local       Set or show the local application-specific Python version
   global      Set or show the global Python version
   shell       Set or show the shell-specific Python version
   install     Install a Python version using python-build
   uninstall   Uninstall a specific Python version
   rehash      Rehash pyenv shims (run this after installing executables)
   version     Show the current Python version and its origin
   versions    List all Python versions available to pyenv
   which       Display the full path to an executable
   whence      List all Python versions that contain the given executable

See `pyenv help <command>' for information on a specific command.
For full documentation, see: https://github.com/yyuu/pyenv#readme

使い方

思想は rbenv と一緒。

python入れるときは pyenv install -l でインストール可能なバージョンを探して、installする。 pypyやjythonも入れられる。

$ pyenv install -l
Available versions:
  2.1.3
  2.2.3
  ...
  2.7.9
  2.7.10
  2.7.11
  ...
  3.5-dev
  3.5.1
  3.6-dev
  ...
  anaconda3-2.4.0
  anaconda3-2.4.1
  ...
  jython-2.7.0
  jython-2.7.1b1
  jython-2.7.1b2
  ...
  pypy3-2.3.1-src
  pypy3-2.3.1
  pypy3-2.4.0-src
  pypy3-2.4.0
  ...
  stackless-3.3.5
  stackless-3.4.1
  ...

python 2.7.11をpyenvで入れてみる。コンパイル走り負荷上がるので少しだけ注意。

$ pyenv install 2.7.11
Downloading Python-2.7.11.tgz...
-> https://www.python.org/ftp/python/2.7.11/Python-2.7.11.tgz
Installing Python-2.7.11...
WARNING: The Python readline extension was not compiled. Missing the GNU readline lib?
WARNING: The Python bz2 extension was not compiled. Missing the bzip2 lib?
WARNING: The Python sqlite3 extension was not compiled. Missing the SQLite3 lib?
Installed Python-2.7.11 to /home/uorat/.pyenv/versions/2.7.11

### 入ったことを確認。

$ pyenv versions
* system (set by /home/uorat/.pyenv/version)
  2.7.11

pyenvで使用するPythonを切り替える。この辺りの使い勝手もrbenvと一緒。

### 現在のバージョン確認。最初はsystemのPython 2.6を見ている。

$ pyenv version
system (set by /home/uorat/.pyenv/version)

### 切り替える

$ pyenv global 2.7.11

### 確認

$ pyenv version
2.7.11 (set by /home/uorat/.pyenv/version)
$ pyenv versions
  system
* 2.7.11 (set by /home/uorat/.pyenv/version)
$ python --version
Python 2.7.11
$ which python
/home/uorat/.pyenv/shims/python

pyenv下でaws-cli入れてみる

無事Python 2.7が入ったのでaws-cli 入るか試してみる。

$ pip install awscli
The directory '/home/uorat/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/uorat/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting awscli
  Downloading awscli-1.10.1-py2.py3-none-any.whl (880kB)
    100% |████████████████████████████████| 884kB 595kB/s
Collecting botocore==1.3.23 (from awscli)
  Downloading botocore-1.3.23-py2.py3-none-any.whl (2.2MB)
    100% |████████████████████████████████| 2.2MB 237kB/s
Collecting rsa<=3.3.0,>=3.1.2 (from awscli)
  Downloading rsa-3.3-py2.py3-none-any.whl (44kB)
    100% |████████████████████████████████| 45kB 2.7MB/s
Collecting colorama<=0.3.3,>=0.2.5 (from awscli)
  Downloading colorama-0.3.3.tar.gz
Collecting docutils>=0.10 (from awscli)
  Downloading docutils-0.12.tar.gz (1.6MB)
    100% |████████████████████████████████| 1.6MB 320kB/s
Collecting jmespath<1.0.0,>=0.7.1 (from botocore==1.3.23->awscli)
  Downloading jmespath-0.9.0-py2.py3-none-any.whl
Collecting python-dateutil<3.0.0,>=2.1 (from botocore==1.3.23->awscli)
  Downloading python_dateutil-2.4.2-py2.py3-none-any.whl (188kB)
    100% |████████████████████████████████| 192kB 2.4MB/s
Collecting pyasn1>=0.1.3 (from rsa<=3.3.0,>=3.1.2->awscli)
  Downloading pyasn1-0.1.9-py2.py3-none-any.whl
Collecting six>=1.5 (from python-dateutil<3.0.0,>=2.1->botocore==1.3.23->awscli)
  Downloading six-1.10.0-py2.py3-none-any.whl
Installing collected packages: jmespath, six, python-dateutil, docutils, botocore, pyasn1, rsa, colorama, awscli
  Running setup.py install for docutils ... done
  Running setup.py install for colorama ... done
Successfully installed awscli-1.10.1 botocore-1.3.23 colorama-0.3.3 docutils-0.12 jmespath-0.9.0 pyasn1-0.1.9 python-dateutil-2.4.2 rsa-3.3 six-1.10.0

成功! あとは、いつもどおりaws configureして、使えば良い。

$ aws configure --profile=hogehoge
AWS Access Key ID [None]: AKIA*******************
AWS Secret Access Key [None]: **************************************
Default region name [None]: ap-northeast-1
Default output format [None]:

$ aws s3 ls --profile=hogehoge
2016-02-02 13:07:03 hogehoge-bucket

aws-cliやAnsibleなどPython系のツールを使いたいけどPythonのバージョンがfdksajfjdsak; 的な悩みを抱えてる方はpyenv使いましょう。