Created an anaconda addon to configure kdump

Author: dashea

.gitignore

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+*~
+*.pyc

LICENSE

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+This is an anaconda addon for configuring kdump. To use, copy the
+com_redhat_kdump directory into /usr/share/anaconda/addons on your
+installation media. /etc/kdump.conf will also be needed in the installation
+environment to provide the default contents of /etc/kdump.conf on the
+installed system.
+
+The syntax of the addon's kickstart section is:
+
+%addon com_redhat_kdump (--enable|--disable) --reserve-mb=("auto"|<amount>)
+<contents of /etc/kdump.conf>
+%end
+
+Note that support for arguments on the %addon line was added in
+anaconda-21.22. See anaconda commit 3a512e4f9e15977f0ce2d0bbe39e841b881398f3,
+https://bugzilla.redhat.com/show_bug.cgi?id=1065674
+

README

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+# Kdump configuration common methods
+#
+# Copyright (C) 2014 Red Hat, Inc.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions of
+# the GNU General Public License v.2, or (at your option) any later version.
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY expressed or implied, including the implied warranties of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+# Public License for more details.  You should have received a copy of the
+# GNU General Public License along with this program; if not, write to the
+# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the
+# source code or documentation are not subject to the GNU General Public
+# License and may only be used or replicated with the express permission of
+# Red Hat, Inc.
+#
+# Red Hat Author(s): David Shea <dshea@redhat.com>
+#
+
+__all__ = ["getReservedMemory", "getTotalMemory", "getMemoryBounds"]
+
+from pyanaconda.isys import total_memory
+from pyanaconda.flags import flags
+
+_reservedMemory = None
+def getReservedMemory():
+    """Return the amount of memory currently reserved for kdump in MB."""
+    global _reservedMemory
+
+    # Check if the value has already been read
+    if _reservedMemory is not None:
+        return _reservedMemory
+
+    try:
+        with open("/sys/kernel/kexec_crash_size", "r") as fobj:
+            _reservedMemory = int(fobj.read()) / (1024*1024)
+            return _reservedMemory
+    except (ValueError, IOError):
+        return 0
+
+def getTotalMemory():
+    """Return the total amount of system memory in MB
+
+       This is the amount reported by /proc/meminfo plus the aount
+       currently reserved for kdump.
+    """
+
+    # total_memory return memory in KB, convert to MB
+    availMem = total_memory() / 1024
+
+    return availMem + getReservedMemory()
+
+def getMemoryBounds():
+    """Return a tuple of (lower, upper, step) for kdump reservation limits.
+
+       If there is not enough memory available to use kdump, both lower and
+       upper will be 0.
+    """
+
+    totalMemory = getTotalMemory()
+
+    if flags.targetarch == 'ppc64':
+        lowerBound = 256
+        minUsable = 1024
+        step = 1
+    else:
+        lowerBound = 128
+        minUsable = 256
+        step = 1
+
+    upperBound = (totalMemory - minUsable) - (totalMemory % step)
+
+    if upperBound < lowerBound:
+        upperBound = lowerBound = 0
+
+    return (lowerBound, upperBound, step)

com_redhat_kdump/__init__.py

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+# Kdump configuration constants
+#
+# Copyright (C) 2014 Red Hat, Inc.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions of
+# the GNU General Public License v.2, or (at your option) any later version.
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY expressed or implied, including the implied warranties of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+# Public License for more details.  You should have received a copy of the
+# GNU General Public License along with this program; if not, write to the
+# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the
+# source code or documentation are not subject to the GNU General Public
+# License and may only be used or replicated with the express permission of
+# Red Hat, Inc.
+#
+# Red Hat Author(s): David Shea <dshea@redhat.com>
+#
+
+# The location of the kdump config file
+CONFIG_FILE = "/etc/kdump.conf"