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Mike Hibler authored
* Add libadminmfs.pm with routines for entering/exiting and executing commands in, the admin MFS. Node admin and firewall swapout (see below) now use this, the image creation process does not yet. * Add swapout time hooks for running an admin mode process, likely to be used to collect swapout time state. Currently controlled globally by two new sitevars. * Modified node_admin to use the library and added a "-c <command>" option to have nodes go into admin mode and run a command. I don't really expect this to be useful, it was just a testing vehicle for the library. 2. Improved the swapout process for firewalled experiments. Largely just generalized what we already did for paniced experiments. At swapout, firewalled nodes are: - powered off - set to boot into admin mode and run a disk zapper - powered on The swapout process then waits for all nodes to successfully complete disk zapage, at which point the nodes are nfree'ed as usual....
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