Redfish:Accessing Redfish enabled systems using Python

Introduction

• This documents contains preparation on the OS to make redfish runs from the OS command line console.
• One sample python script is provided, with sample output.
• As of this writing, only Red Hat 6.x is supported (tested)
• This document only covers additional steps needed to make redfish run on the OS. It does not cover OS installation instructions.
• This was done on a vanilla CentOS 6.7 installation

Installation of Chrome Browser

• Not actually vital but useful for when you have to do individual manual test, launching RESTful API commands, etc
• Installation must be done as root

[root@localhost ~]# cd Downloads/
[root@localhost Downloads]# wget http://chrome.richardlloyd.org.uk/install_chrome.sh
--2016-01-11 03:50:00--  http://chrome.richardlloyd.org.uk/install_chrome.sh
Resolving chrome.richardlloyd.org.uk... 193.110.246.53
Connecting to chrome.richardlloyd.org.uk|193.110.246.53|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 79768 (78K) [application/x-sh]
Saving to: “install_chrome.sh”

100%[================================================================================>] 79,768      --.-K/s   in 0.1s    

2016-01-11 03:50:01 (541 KB/s) - “install_chrome.sh” saved [79768/79768]

[root@localhost Downloads]# chmod +x install_chrome.sh 
[root@localhost Downloads]# ./install_chrome.sh

Installation of Python 2.7

• Next, you will need to install Python 2.7, since Red Hat default Python version is 2.6
• Warning: Red Hat OS depends on Python version 2.6, therefore, Python version 2.7 must coexist, and you are not allowed to replace version 2.6
• This should be done as root

[root@localhost Downloads]# yum -y groupinstall "development tools"
[root@localhost Downloads]# yum -y install zlib-devel openssl openssl-devel
[root@localhost Downloads]# mkdir tmp
[root@localhost Downloads]# cd tmp
[root@localhost tmp]# wget http://python.org/ftp/python/2.7.3/Python-2.7.3.tgz
[root@localhost tmp]# tar zxvf Python-2.7.3.tgz
[root@localhost tmp]# cd Python-2.7.3
[root@localhost Python-2.7.3]# ./configure --prefix=/opt/python2.7 --enable-shared
[root@localhost Python-2.7.3]# make
[root@localhost Python-2.7.3]# make altinstall
[root@localhost Python-2.7.3]# echo "/opt/python2.7/lib" >> /etc/ld.so.conf.d/opt-python2.7.conf
[root@localhost Python-2.7.3]# ldconfig

Setup Path

• Go to your home directory, then edit your .bashrc file
• Note: You don’t have to be root to edit .bashrc, since this is your own account’s file
• Add this line to your .bashrc file:

export PATH=${PATH}:/opt/python2.7/bin

• For example:

# .bashrc

# Source global definitions
if [ -f /etc/bashrc ]; then
        . /etc/bashrc
fi

# User specific aliases and functions
export PATH=${PATH}:/opt/python2.7/bin

• Then source .bashrc

[jon@localhost ~]$ source ./.bashrc

• Confirm the Python 2.7 binary directory is now in your path:

[jon@localhost ~]$ echo $PATH
/usr/lib64/qt-3.3/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/jon/bin:/opt/python2.7/bin

Install PIP 2.7

• Installation must be done as root

[root@localhost ~]# cd /opt/python2.7/bin/
[root@localhost bin]# wget https://bootstrap.pypa.io/get-pip.py
[root@localhost bin]# ./python2.7 get-pip.py
Collecting pip
/tmp/tmpWViYfj/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: 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 information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
  Downloading pip-7.1.2-py2.py3-none-any.whl (1.1MB)
    100% |████████████████████████████████| 1.1MB 306kB/s 
Collecting setuptools
  Downloading setuptools-19.2-py2.py3-none-any.whl (463kB)
    100% |████████████████████████████████| 466kB 719kB/s 
Collecting wheel
  Downloading wheel-0.26.0-py2.py3-none-any.whl (63kB)
    100% |████████████████████████████████| 65kB 4.5MB/s 
Installing collected packages: pip, setuptools, wheel
Successfully installed pip-7.1.2 setuptools-19.2 wheel-0.26.0
/tmp/tmpWViYfj/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: 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 information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.

• NB: If wget command does not work, use wget --no-check-certificate command

Python Requests package

[root@localhost bin]# ./pip2.7 install requests
Collecting requests
/opt/python2.7/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: 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 information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
  Downloading requests-2.9.1-py2.py3-none-any.whl (501kB)
    100% |████████████████████████████████| 503kB 585kB/s 
Installing collected packages: requests
Successfully installed requests-2.9.1