Changeset 2829 for trunk

Timestamp:

Jan 1, 2010, 7:07:46 PM (15 years ago)

Author:

broder

Message:

Don't try to start sysvms in the invirt-xen-config init script.

This code just doesn't work. In fact, I've seen it result in 0, 1, or

1 instances of sysvms running simultaneously, which makes it

officially worthless.

Location:

trunk/packages/invirt-xen-config/debian

Files:

• changelog (modified) (1 diff)
• invirt-xen-config.init (modified) (2 diffs)

trunk/packages/invirt-xen-config/debian/changelog

@@ -1 +1 @@
 invirt-xen-config (0.0.27) unstable; urgency=low
 
+  [ Greg Brockman ]
   * Nuked the pinning of libxen3
 
- -- Greg Brockman <gdb@mit.edu>  Fri, 01 Jan 2010 18:28:45 -0500
+  [ Evan Broder ]
+  * Don't try to start sysvms in the invirt-xen-config init script. The
+    code has never been reliable.
+
+ -- Evan Broder <broder@mit.edu>  Fri, 01 Jan 2010 17:58:57 -0600
 
 invirt-xen-config (0.0.26) unstable; urgency=low

trunk/packages/invirt-xen-config/debian/invirt-xen-config.init

@@ -14 +14 @@
 DESC="Invirt Xen host"
 PARENTPACKAGE=xend
-SYSVM_FILES=($(run-parts --list /etc/xen/sysvms))
-SYSVMS=("${SYSVM_FILES[@]/#\/etc\/xen\/sysvms\/}")
 GEN_FILES=(/etc/xen/xend-config.sxp.invirt)
 
@@ -23 +21 @@
 . /lib/init/std-init.sh
 
-start_sysvm() {
-    # Attempt to start a sysvm, but only if it's not running already
-    # somewhere on the cluster
-    
-    VM="$1"
-    LV="${VM}_hda"
-    DISK="/dev/xenvg/$LV"
-    
-    # Don't bother trying to start the VM if it's already running
-    if xm list "$VM" >/dev/null 2>&1; then
-        return 1
-    fi
-    
-    RET=1
-    # To keep multiple hosts from trying to start a VM at the same
-    # time, lock VM creation at startup-time with a lock LV, since LV
-    # creation is atomic
-    if lvcreate -L 1K -n "lock_${LV}" xenvg >/dev/null 2>&1; then
-        # If we can disable the LV, then the VM isn't already running
-        # somewhere else
-        if lvchange -a n "$DISK" >/dev/null 2>&1; then
-            lvchange -a y "$DISK" >/dev/null 2>&1
-            
-            [ "$VERBOSE" != no ] && log_daemon_msg "Starting sysvm $VM"
-            xm create "sysvms/$VM" >/dev/null
-            [ "$VERBOSE" != no ] && log_end_msg $?
-            RET=0
-        fi
-        
-        # Regardless of whether we could get the lock or not, the
-        # lvchange -a n probably disabled the LV somewhere; be sure we
-        # clean up
-        lvchange -a y "$DISK" >/dev/null 2>&1
-    
-        # Cleanup the lock, regardless of whether we started the LV
-        lvchange -a n "/dev/xenvg/lock_${LV}" >/dev/null 2>&1
-        lvchange -a ey "/dev/xenvg/lock_${LV}" >/dev/null 2>&1
-        lvremove -f "/dev/xenvg/lock_${LV}" >/dev/null 2>&1
-    fi
-    
-    return $RET
-}
-
 do_startup() {
     gen_files
-    
-    for vm in "${SYSVMS[@]}"; do
-        start_sysvm "$vm"
-    done
     
     echo 1 >/proc/sys/net/ipv4/ip_forward