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A Simple Internal Cloud Tool
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= Overview = Maglica is a Python library and command-line tool for an internal cloud. (This tool is primitive beta now.) This is very simple and based on libvirt, virt-clone and zeromq (for RPC). The name "Maglica" is derived from a Bosnian word that means "Nebula." = Architecture of Maglica = Maglica has four components. 1. Library 2. CLI 3. Client worker 4. Host workers Maglica library is a main component of Maglica.Maglica CLI calls the library to do the jobs.The library talks to libvirtd on other hosts directly to get virtual machines information. Maglica client worker is running on the same host which cli runs. Client worker binds zeromq PUB socket to tcp://*:5555 and REP socket to tcp://*:5556. Client worker recieves requests from library through REP socket and throws request to host workers through PUB socket.Also REP socket recives job results from host workers. Host workers are running on hosts which virtual machines are running on. Host workers connect to the PUB socket of a client worker to receive job requests and the REP socket of a client worker to throw job results. = How to use Maglica = You must setup libvirtd running on host machines and accessible through tcp port. (See http://libvirt.org/remote.html) Run git clone on a host machine and run the host worker. # git clone git://github.com/mizzy/maglica.git # cd maglica # python setup.py install # cp etc/maglica.conf.example /etc/maglica.conf Edit /etc/maglica.conf that points to the correct client worker host and port. Then run the host worker. # maglica_host_worker Run git clone on a client machine. # git clone git://github.com/mizzy/maglica.git # cd maglica # cp etc/maglica.conf.example /etc/maglica.conf Edit /etc/maglica.conf that points to host machines. Then run the client worker. # maglica_client_worker Run maglica command to list up "original images" (They are only inactive domains). $ maglica image list Name Host --------------------------------------------------------- SL6.0-x86_64.original host0.example.jp SL6.1-x86_64.original host0.example.jp SL6.0-x86_64.original host1.example.jp SL6.1-x86_64.original host1.example.jp Run maclica command to clone a virtual machine image. $ maglica vm clone --image=SL6.1-x86_64.original --hostname=vm0.example.jp This command clones the image on a host and rewrites network setting of the image with libguestfs.
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