[lxc-devel] [PATCH] oracle template: mount /dev/shm as tmpfs

[Dwight Engen]

sem_open(3) checks that /dev/shm is SHMFS_SUPER_MAGIC. Normally /dev/shm
is mounted in the initramfs created by dracut, but that won't be run for
a container so make sure that rc.sysinit mounts /dev/shm.

Signed-off-by: Dwight Engen <dwight.engen at oracle.com>
---
 templates/lxc-oracle.in | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/templates/lxc-oracle.in b/templates/lxc-oracle.in
index 946956d..70ef632 100644
--- a/templates/lxc-oracle.in
+++ b/templates/lxc-oracle.in
@@ -142,6 +142,17 @@ EOF
         sed -i 's|action $"Setting network parameters|# LXC action $"Setting network parameters|' $container_rootfs/etc/init.d/NetworkManager 2>/dev/null
     fi
 
+    # sem_open(3) checks that /dev/shm is SHMFS_SUPER_MAGIC, so make sure to mount /dev/shm (normally done by dracut initrd) as tmpfs
+    if [ $container_release_major = "4" -o $container_release_major = "5" ]; then
+        echo "mount -t tmpfs tmpfs /dev/shm" >>$container_rootfs/etc/rc.sysinit
+        echo "mount -t tmpfs tmpfs /dev/shm" >>$container_rootfs/etc/rc.d/rc.sysinit
+    fi
+
+    if [ $container_release_major = "6" ]; then
+        sed -i 's|mount -n -o remount /dev/shm >/dev/null 2>&1$|mount -t tmpfs tmpfs /dev/shm # LXC|' $container_rootfs/etc/rc.sysinit
+        sed -i 's|mount -n -o remount /dev/shm >/dev/null 2>&1$|mount -t tmpfs tmpfs /dev/shm # LXC|' $container_rootfs/etc/rc.d/rc.sysinit
+    fi
+
     # no need to attempt to mount /
     sed -i 's|mount -f /$|# LXC mount -f /|' $container_rootfs/etc/rc.sysinit
     sed -i 's|mount -f /$|# LXC mount -f /|' $container_rootfs/etc/rc.d/rc.sysinit
-- 
1.8.1.4