for centos5.3 - workaround for mkinitrd, as our kernel lacks the dm-mem-cache module

diff --git a/source/steps/MakeInitrd.py b/source/steps/MakeInitrd.py
index 043db9c..7fa7178 100644 (file)
--- a/source/steps/MakeInitrd.py
+++ b/source/steps/MakeInitrd.py
@@ -13,6 +13,31 @@ import utils
 import systeminfo
 import shutil
 
+def kernelHasMkinitrd():
+    #  Older bootcds only support LinuxThreads.  This hack is to get mkinitrd
+    #  to run without segfaulting by using /lib/obsolete/linuxthreads
+    kver = os.popen("/bin/uname -r", "r").readlines()[0].rstrip().split(".")
+    if int(kver[1]) > 4:
+        return True
+    elif int(kver[1]) <=4:
+        return False
+
+
+# for centos5.3
+# 14:42:27(UTC) No module dm-mem-cache found for kernel 2.6.22.19-vs2.3.0.34.33.onelab, aborting.
+# http://kbase.redhat.com/faq/docs/DOC-16528;jsessionid=7E984A99DE8DB094D9FB08181C71717C.ab46478d
+def bypassRaidIfNeeded(sysimg_path):
+    try:
+        [ a,b,c,d]=file('%s/etc/redhat-release'%sysimg_path).readlines()[0].strip().split()
+        if a !='CentOS': return
+        [major,minor]=[int(x) for x in c.split('.')]
+        if minor >= 3:
+            utils.sysexec_noerr('echo "DMRAID=no" >> %s/etc/sysconfig/mkinitrd/noraid' % sysimg_path)
+            utils.sysexec_noerr('chmod 755 %s/etc/sysconfig/mkinitrd/noraid' % sysimg_path)
+    except:
+        pass
+            
+        
 def Run( vars, log ):
     """
     Rebuilds the system initrd, on first install or in case the
@@ -43,7 +68,9 @@ def Run( vars, log ):
 
     initrd, kernel_version= systeminfo.getKernelVersion(vars,log)
     utils.removefile( "%s/boot/%s" % (SYSIMG_PATH, initrd) )
-    if checkKern() == True:
+    # hack for CentOS 5.3
+    bypassRaidIfNeeded(SYSIMG_PATH)
+    if kernelHasMkinitrd() == True:
         utils.sysexec( "chroot %s mkinitrd -v /boot/initrd-%s.img %s" % \
                    (SYSIMG_PATH, kernel_version, kernel_version), log )
     else:
@@ -54,11 +81,3 @@ def Run( vars, log ):
     utils.sysexec_noerr("umount %s/sys" % SYSIMG_PATH)
     utils.sysexec_noerr("umount %s/dev" % SYSIMG_PATH)
 
-def checkKern():
-    #  Older bootcds only support LinuxThreads.  This hack is to get mkinitrd
-    #  to run without segfaulting by using /lib/obsolete/linuxthreads
-    kver = os.popen("/bin/uname -r", "r").readlines()[0].rstrip().split(".")
-    if int(kver[1]) > 4:
-        return True
-    elif int(kver[1]) <=4:
-        return False