Dr Venu Murthy

Source This is our life when we are working on automating some really complicated machine building and provisioning procedures. I.e. while developing the playbooks in Ansible, or CookBooks in Chef or manifests in Puppet. It is not easy to fail faster and fix early as the script might have to download all the dependencies again and again. Adding to all the odds, it could be that the dependencies are being downloaded on a low bandwidth. Even though Vagrant makes bringing up VM and their management faster, the provisioning (using Ansible, Chef or Puppet or etc) might take inordinately long times when it involves, and it usually does involve downloading packages on the VMs. And it gets painful when you have to download a full stack of several libraries to test your VM. To help overcome this issue, we can use the following to cache the dependencies and test the configuration scripts or recipes faster, the following should set you up (assuming you have vagrant already installe

In case your tasks is to install some packages and it errors out as below - name: Install linux-headers apt: pkg={{item}} state=installed install_recommends=yes update_cache=yes with_items: - linux-headers-generic - dkms sudo: yes failed: [parallelsUbuntu] => (item=linux-headers-generic,dkms) => {"failed": true, "item": "linux-headers-generic,dkms"} stderr: E: There are problems and -y was used without --force-yes stdout: Reading package lists... Building dependency tree... Reading state information... The following extra packages will be installed:   cpp fakeroot gcc libfakeroot linux-headers-3.13.0-63   linux-headers-3.13.0-63-generic patch Suggested packages:   cpp-doc dpkg-dev debhelper gcc-multilib manpages-dev autoconf automake1.9   libtool flex bison gdb gcc-doc diffutils-doc The following NEW packages will be installed:   cpp dkms fakeroot gcc libfakeroot linux-headers-3

Get the Development, QA, Staging or Production Environment you need at the click of a button. Software Defined Environment The current situation It wouldn’t be a bold statement to say that all software’s ultimate goal is to enhance the customer experience. How many times have we not read such comments on app stores or heard business say?   “Great app, but I can only give it three stars until the developers add ...” But the Development team’s side of the story is     “I am waiting for the environment to test the code with new features” Continuous Delivery and Continuous Integration can help release software updates more frequently and with almost no manual intervention, but there are some bottlenecks to being able to do this. Following are a few: - Delay in getting the Environments   Lack of self-provisioning creates dependency on IT department. Lack of easily customizable Environments For Development, Testing and Staging with new feat

Error: neutron IOError: [Errno 2] No such file or directory: '/proc/ sys/net/ ipv6/conf/ default/ disable_ ipv6' Due to this error, the neutron-l3-agent does not start up. End errors out. with the above error. There is a bug filed for this and patched in releases after Icehouse. Solution This bug is fixed by doing this curl -o /usr/lib/python 2.6/site-packag es/neutron/comm on/ipv6_utils.p y  https://raw.git hubusercontent. com/openstack/n eutron/stable/i cehouse/neutron /common/ipv6_ut ils.py

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 52.0.234.85 52.0.234.85 Starting Chef Client, version 11.18.6 52.0.234.85 52.0.234.85 ================================================================================ 52.0.234.85 Chef encountered an error attempting to load the node data for "first1" 52.0.234.85 ================================================================================ 52.0.234.85 52.0.234.85 Unexpected Error: 52.0.234.85 ----------------- 52.0.234.85 Chef::Exceptions::JSON::ParseError: parse error: premature EOF 52.0.234.85 52.0.234.85                      (right here) ------^ 52.0.234.85 52.0.234.85 [2015-02-09T02:36:38-05:00] FATAL: Stacktrace dumped to /var/chef/cache/chef-stacktrace.out 52.0.234.85 Chef Client failed. 0 resources updated in 0.854925495 seconds 52.0.234.85 [2015-02-09T02:36:38-05:00] ERROR: parse error: premature EOF 52.0.234.85 52.0.234.85                      (right here) ------^ 52

While bootstrapping a redhat node which is on AWS EC2, which supports only the SSH identity file for authentication, I was getting the below error after this command  knife bootstrap 52.0.13.12 --ssh-user ec2-user --identity-file ~/.ssh/xyz.pem --node-name first1 --run-list 'recipe[some_thing]' Error 52.0.13.132 Installing Chef Client... 52.0.13.132   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current 52.0.13.132                                  Dload  Upload   Total   Spent    Left  Speed 100 18285  100 18285    0     0  48457      0 --:--:-- --:--:-- --:--:-- 48630 52.0.13.132 Downloading Chef 11 for el... 52.0.13.132 downloading https://www.opscode.com/chef/metadata?v=11&prerelease=false&nightlies=false&p=el&pv=7&m=x86_64 52.0.13.132   to file /tmp/install.sh.940/metadata.txt 52.0.13.132 trying curl... 52.0.13.132 url https://opscode-omnibus-packages.s3.amazonaws.com/el/6/x86_64/chef-11.18.6-1.el6

Today I wanted to play around hashing passwords and installing  bcrypt and got the below errors and the solution to this is as simple as running xcode-select --install and then pip install using elevated privilages     cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -arch i386 -pipe -DUSE__THREAD -I/usr/include/ffi -I/usr/include/libffi -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c c/_cffi_backend.c -o build/temp.macosx-10.9-intel-2.7/c/_cffi_backend.o     c/_cffi_backend.c:13:10: fatal error: 'ffi.h' file not found     #include <ffi.h>              ^     1 error generated.     error: command 'cc' failed with exit status 1     Complete output from command /usr/bin/python -c "