[libvirt] Libvirt/LXC (lxcControllerMain:380 : EPOLLHUP from fd 7)
hello, i am trying to use libvirt with LXC, and having some issues... everything seems ok when using lxc-* tools. host box is Arch Linux. ultimately i'm getting this error in the domain log: ..... 05:45:31.353: debug : lxcControllerMain:380 : EPOLLHUP from fd 7 i was getting this last night in #virt: ..... 20:49:57.545: error : lxcFdForward:230 : read of fd 7 failed: Input/output error libvir: Linux Container error : read of fd 7 failed: Input/output error instead of the former, but i can seem to reproduce now. i might have replaced 0.7.4 version with git version... i dont remember. right now the build is direct from master, and i am getting EPOLLHUP. didnt see anything interesting in virsh or libvirtd debug output, but i can paste/bin the whole thing or whatever else if need be. -----VERSIONS/SOURCES (loadmodconfig make target + below) kernel: Linux PHS-001 2.6.32-custom #1 SMP PREEMPT Sun Dec 6 05:29:37 CST 2009 i686 Intel(R) Xeon(TM) CPU 3.20GHz GenuineIntel GNU/Linux CONFIG_DEVPTS_MULTIPLE_INSTANCES=y CONFIG_GROUP_SCHED=y CONFIG_FAIR_GROUP_SCHED=y CONFIG_RT_GROUP_SCHED=y CONFIG_CGROUP_SCHED=y CONFIG_CGROUPS=y CONFIG_CGROUP_NS=y CONFIG_CGROUP_FREEZER=y CONFIG_CGROUP_DEVICE=y CONFIG_CPUSETS=y CONFIG_PROC_PID_CPUSET=y CONFIG_CGROUP_CPUACCT=y CONFIG_RESOURCE_COUNTERS=y CONFIG_CGROUP_MEM_RES_CTLR=y CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y CONFIG_MM_OWNER=y CONFIG_NAMESPACES=y CONFIG_UTS_NS=y CONFIG_IPC_NS=y CONFIG_USER_NS=y CONFIG_PID_NS=y CONFIG_NET_NS=y CONFIG_NET_CLS_CGROUP=y CONFIG_SECURITY_FILE_CAPABILITIES=y (built from master) libvirt: http://aur.archlinux.org/packages/libvirt-git/libvirt-git/PKGBUILD --with-capng --with-network --with-lxc --without-xen --without-xen-inotify --without-qemu --without-uml --without-openvz --without-vbox --without-one --without-esx libcap-ng: http://aur.archlinux.org/packages/libcap-ng/libcap-ng/PKGBUILD container: http://www.stgraber.org/2009/11/06/lxc-containers-or-extremely-fast-virtuali... http://www.stgraber.org/download/lxc-ubuntu-8.04-i386.tar.gz -----CONFIGURATION # host ptmx symlinked to pts/ptmx [root@PHS-001 vps]# ls -l /dev/ptmx lrwxrwxrwx 1 root root 8 2009-12-08 04:40 /dev/ptmx -> pts/ptmx # guest ptmx symlinked to pts/ptmx [root@PHS-001 vps]# ls -l /vps/dom/ubuntu/root/dev/ptmx lrwxrwxrwx 1 root root 8 2009-12-06 04:11 /vps/dom/ubuntu/root/dev/ptmx -> pts/ptmx # host devpts mounted newinstance [root@PHS-001 vps]# mount | grep devpts none on /dev/pts type devpts (rw,newinstance) # single cgroup mount on host [root@PHS-001 vps]# mount | grep cgroup none on /cgroup type cgroup (rw) # libvirt config [root@PHS-001 vps]# grep -v -e '^#\|^ *$' /etc/libvirt/libvirtd.conf auth_unix_ro = "none" auth_unix_rw = "none" # guest config... # i have tried the legacy <console type='pty' /> with same results # i dont fully understand this, why do i need to specify a host/source pty? [root@PHS-001 vps]# cat /vps/def/exec/sys/ubuntu.xml <domain type='lxc'> <name>ubuntu</name> <memory>500000</memory> <os> <type arch='i686'>exe</type> <init>/sbin/init</init> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <filesystem type='mount'> <source dir='/vps/dom/ubuntu/root'/> <target dir='/'/> </filesystem> <console type='pty'> <source path='/dev/pts/4'/> <target port='0'/> </console> </devices> </domain> -----PROCEDURE [root@PHS-001 vps]# LIBVIRT_DEBUG=1 libvirtd --daemon 05:42:46.121: debug : virInitialize:278 : register drivers ..... [root@PHS-001 vps]# virsh -c lxc:/// define /vps/def/exec/sys/ubuntu.xml Domain ubuntu defined from /vps/def/exec/sys/ubuntu.xml [root@PHS-001 vps]# virsh -c lxc:/// define /vps/def/exec/sys/ubuntu.xml Domain ubuntu defined from /vps/def/exec/sys/ubuntu.xml [root@PHS-001 vps]# virsh -c lxc:/// start ubuntu Domain ubuntu started [root@PHS-001 vps]# virsh -c lxc:/// console ubuntu error: Unable to get domain status error: internal error Unable to get cgroup for ubuntu -----LOGS # /var/log/libvirt/lxc/ubuntu.log 05:45:31.105: debug : lxcControllerRun:540 : Setting up private /dev/pts 05:45:31.125: debug : lxcControllerRun:566 : Mouting 'devpts' on /vps/dom/ubuntu/root/dev/pts 05:45:31.125: debug : lxcControllerRun:581 : Opening tty on private /vps/dom/ubuntu/root/dev/pts/ptmx 05:45:31.125: debug : virCgroupNew:492 : New group / 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 0:cpu at /cgroup in /1534 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 1:cpuacct at /cgroup in /1534 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 2:cpuset at /cgroup in /1534 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 3:memory at /cgroup in /1534 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 4:devices at /cgroup in /1534 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 5:freezer at /cgroup in /1534 05:45:31.125: debug : virCgroupNew:492 : New group /libvirt 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 0:cpu at /cgroup in /1534 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 1:cpuacct at /cgroup in /1534 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 2:cpuset at /cgroup in /1534 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 3:memory at /cgroup in /1534 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 4:devices at /cgroup in /1534 05:45:31.125: debug : virCgroupDetect:230 : Detected mount/mapping 5:freezer at /cgroup in /1534 05:45:31.125: debug : virCgroupMakeGroup:450 : Make group /libvirt 05:45:31.125: debug : virCgroupMakeGroup:462 : Make controller /cgroup/1534/libvirt/ 05:45:31.125: debug : virCgroupCpuSetInherit:416 : Setting up inheritance / -> /libvirt 05:45:31.126: debug : virCgroupGetValueStr:305 : Get value /cgroup/1534/cpuset.cpus 05:45:31.126: debug : virCgroupCpuSetInherit:429 : Inherit cpuset.cpus = 0-3 05:45:31.126: debug : virCgroupSetValueStr:275 : Set value /cgroup/1534/libvirt/cpuset.cpus 05:45:31.126: debug : virCgroupGetValueStr:305 : Get value /cgroup/1534/cpuset.mems 05:45:31.126: debug : virCgroupCpuSetInherit:429 : Inherit cpuset.mems = 0 05:45:31.126: debug : virCgroupSetValueStr:275 : Set value /cgroup/1534/libvirt/cpuset.mems 05:45:31.126: debug : virCgroupMakeGroup:462 : Make controller /cgroup/1534/libvirt/ 05:45:31.126: debug : virCgroupMakeGroup:462 : Make controller /cgroup/1534/libvirt/ 05:45:31.126: debug : virCgroupMakeGroup:462 : Make controller /cgroup/1534/libvirt/ 05:45:31.126: debug : virCgroupMakeGroup:462 : Make controller /cgroup/1534/libvirt/ 05:45:31.126: debug : virCgroupMakeGroup:462 : Make controller /cgroup/1534/libvirt/ 05:45:31.126: debug : virCgroupNew:492 : New group /libvirt/lxc 05:45:31.126: debug : virCgroupDetect:230 : Detected mount/mapping 0:cpu at /cgroup in /1534 05:45:31.126: debug : virCgroupDetect:230 : Detected mount/mapping 1:cpuacct at /cgroup in /1534 05:45:31.126: debug : virCgroupDetect:230 : Detected mount/mapping 2:cpuset at /cgroup in /1534 05:45:31.126: debug : virCgroupDetect:230 : Detected mount/mapping 3:memory at /cgroup in /1534 05:45:31.126: debug : virCgroupDetect:230 : Detected mount/mapping 4:devices at /cgroup in /1534 05:45:31.126: debug : virCgroupDetect:230 : Detected mount/mapping 5:freezer at /cgroup in /1534 05:45:31.126: debug : virCgroupMakeGroup:450 : Make group /libvirt/lxc 05:45:31.126: debug : virCgroupMakeGroup:462 : Make controller /cgroup/1534/libvirt/lxc/ 05:45:31.211: debug : lxcContainerStart:832 : clone() returned, 1536 05:45:31.353: debug : lxcControllerMain:380 : EPOLLHUP from fd 7 -----END i've tried endless variations of the <devices> section, but i just cant seem to get anything going with libvirt/LXC once i move the root to a new location for a system container. same container works fine with lxc-* tools (although i manually make a bridge). any help is appreciated, C Anthony Risinger
On Mon, Dec 07, 2009 at 03:02:53AM -0600, Tony Risinger wrote:
hello,
i am trying to use libvirt with LXC, and having some issues... everything seems ok when using lxc-* tools. host box is Arch Linux. ultimately i'm getting this error in the domain log:
..... 05:45:31.353: debug : lxcControllerMain:380 : EPOLLHUP from fd 7
i was getting this last night in #virt:
..... 20:49:57.545: error : lxcFdForward:230 : read of fd 7 failed: Input/output error libvir: Linux Container error : read of fd 7 failed: Input/output error
I believe this essentially says that the container has shutdown.
-----CONFIGURATION
# host ptmx symlinked to pts/ptmx [root@PHS-001 vps]# ls -l /dev/ptmx lrwxrwxrwx 1 root root 8 2009-12-08 04:40 /dev/ptmx -> pts/ptmx
# guest ptmx symlinked to pts/ptmx [root@PHS-001 vps]# ls -l /vps/dom/ubuntu/root/dev/ptmx lrwxrwxrwx 1 root root 8 2009-12-06 04:11 /vps/dom/ubuntu/root/dev/ptmx -> pts/ptmx
Avoid doing this - libvirt will set that up as part of the container bootstrapping processs.
# guest config... # i have tried the legacy <console type='pty' /> with same results # i dont fully understand this, why do i need to specify a host/source pty? [root@PHS-001 vps]# cat /vps/def/exec/sys/ubuntu.xml <domain type='lxc'> <name>ubuntu</name> <memory>500000</memory> <os> <type arch='i686'>exe</type> <init>/sbin/init</init> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <filesystem type='mount'> <source dir='/vps/dom/ubuntu/root'/> <target dir='/'/> </filesystem> <console type='pty'> <source path='/dev/pts/4'/>
Leave out the <source> here - that's auto-generated when the container starts
<target port='0'/> </console> </devices> </domain>
-----PROCEDURE
[root@PHS-001 vps]# LIBVIRT_DEBUG=1 libvirtd --daemon 05:42:46.121: debug : virInitialize:278 : register drivers .....
[root@PHS-001 vps]# virsh -c lxc:/// define /vps/def/exec/sys/ubuntu.xml Domain ubuntu defined from /vps/def/exec/sys/ubuntu.xml
[root@PHS-001 vps]# virsh -c lxc:/// define /vps/def/exec/sys/ubuntu.xml Domain ubuntu defined from /vps/def/exec/sys/ubuntu.xml
[root@PHS-001 vps]# virsh -c lxc:/// start ubuntu Domain ubuntu started
[root@PHS-001 vps]# virsh -c lxc:/// console ubuntu error: Unable to get domain status error: internal error Unable to get cgroup for ubuntu
-----LOGS
# /var/log/libvirt/lxc/ubuntu.log 05:45:31.126: debug : virCgroupMakeGroup:450 : Make group /libvirt/lxc 05:45:31.126: debug : virCgroupMakeGroup:462 : Make controller /cgroup/1534/libvirt/lxc/ 05:45:31.211: debug : lxcContainerStart:832 : clone() returned, 1536 05:45:31.353: debug : lxcControllerMain:380 : EPOLLHUP from fd 7
i've tried endless variations of the <devices> section, but i just cant seem to get anything going with libvirt/LXC once i move the root to a new location for a system container. same container works fine with lxc-* tools (although i manually make a bridge). any help is appreciated,
Rather that going straight for a full OS, try just setting up a trivial busybox root environment which just takes you intoa busybox shell. eg, in /sbin/init just have #!/sbin/busybox sh (Obviously install busybox in /sbin inside the root env too :-) Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|
i have made a busybox container mostly from here: https://lists.linux-foundation.org/pipermail/containers/2008-September/01332... please see sections below; i do not think i am doing anything wrong. is there somewhere i could download a known working config + root? also, do i not need to manually create critical devices like zero/random and friends? i havent seen anything about this in docs. thanks there is nothing in the root now except this: [root@PHS-001 vps]# tree /vps/dom/arch-nano/ /vps/dom/arch-nano/ |-- bin | |-- cat -> ../sbin/busybox | |-- chdir -> ../sbin/busybox | |-- chmod -> ../sbin/busybox | |-- ls -> ../sbin/busybox | |-- rm -> ../sbin/busybox | |-- sh -> ../sbin/busybox | `-- vi -> ../sbin/busybox |-- dev | `-- pts |-- myc.xml |-- proc |-- sbin | |-- busybox | `-- init `-- sys and my /sbin/init looks like this: [root@PHS-001 vps]# cat /vps/dom/arch-nano/sbin/init #!/sbin/busybox sh config looks like: [root@PHS-001 vps]# cat /vps/dom/arch-nano/myc.xml <domain type='lxc'> <name>myc</name> <memory>500000</memory> <os> <type>exe</type> <init>/sbin/init</init> </os> <devices> <filesystem type='mount'> <source dir='/vps/dom/arch-nano'/> <target dir='/'/> </filesystem> <interface type='network'> <source network='default'/> </interface> <console type='pty' /> </devices> </domain> same thing when ran: [root@PHS-001 vps]# virsh -c lxc:/// create /vps/dom/arch-nano/myc.xml Domain myc created from /vps/dom/arch-nano/myc.xml [root@PHS-001 vps]# virsh -c lxc:/// console myc error: Unable to get domain status error: internal error Unable to get cgroup for myc [root@PHS-001 vps]# virsh -c lxc:/// list Id Name State ---------------------------------- 22307 myc no state why/how is busyboy trying to spawn an init? or what is happening here.... ......... 22307 ? Ss 0:00 /usr/lib/libvirt-git/libvirt_lxc --name myc --console 11 --background --veth veth1 22309 ? Ss 0:00 /sbin/busybox init 22914 ? Z 0:00 [init] <defunct> .......... domain log (pid seem to match above so i dont know why it cant find it... seems like the cgroup folder matches the pid of the hypervisor/lxc driver?): 18:07:20.866: debug : lxcControllerRun:540 : Setting up private /dev/pts 18:07:20.883: debug : lxcControllerRun:566 : Mouting 'devpts' on /vps/dom/arch-nano/dev/pts 18:07:20.883: debug : lxcControllerRun:581 : Opening tty on private /vps/dom/arch-nano/dev/pts/ptmx 18:07:20.883: debug : virCgroupNew:492 : New group / 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 0:cpu at /cgroup in /22307 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 1:cpuacct at /cgroup in /22307 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 2:cpuset at /cgroup in /22307 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 3:memory at /cgroup in /22307 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 4:devices at /cgroup in /22307 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 5:freezer at /cgroup in /22307 18:07:20.883: debug : virCgroupNew:492 : New group /libvirt 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 0:cpu at /cgroup in /22307 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 1:cpuacct at /cgroup in /22307 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 2:cpuset at /cgroup in /22307 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 3:memory at /cgroup in /22307 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 4:devices at /cgroup in /22307 18:07:20.883: debug : virCgroupDetect:230 : Detected mount/mapping 5:freezer at /cgroup in /22307 18:07:20.883: debug : virCgroupMakeGroup:450 : Make group /libvirt 18:07:20.883: debug : virCgroupMakeGroup:462 : Make controller /cgroup/22307/libvirt/ 18:07:20.884: debug : virCgroupCpuSetInherit:416 : Setting up inheritance / -> /libvirt 18:07:20.884: debug : virCgroupGetValueStr:305 : Get value /cgroup/22307/cpuset.cpus 18:07:20.884: debug : virCgroupCpuSetInherit:429 : Inherit cpuset.cpus = 0-3 18:07:20.884: debug : virCgroupSetValueStr:275 : Set value /cgroup/22307/libvirt/cpuset.cpus 18:07:20.884: debug : virCgroupGetValueStr:305 : Get value /cgroup/22307/cpuset.mems 18:07:20.884: debug : virCgroupCpuSetInherit:429 : Inherit cpuset.mems = 0 18:07:20.884: debug : virCgroupSetValueStr:275 : Set value /cgroup/22307/libvirt/cpuset.mems 18:07:20.884: debug : virCgroupMakeGroup:462 : Make controller /cgroup/22307/libvirt/ 18:07:20.884: debug : virCgroupMakeGroup:462 : Make controller /cgroup/22307/libvirt/ 18:07:20.884: debug : virCgroupMakeGroup:462 : Make controller /cgroup/22307/libvirt/ 18:07:20.884: debug : virCgroupMakeGroup:462 : Make controller /cgroup/22307/libvirt/ 18:07:20.884: debug : virCgroupMakeGroup:462 : Make controller /cgroup/22307/libvirt/ 18:07:20.884: debug : virCgroupNew:492 : New group /libvirt/lxc 18:07:20.884: debug : virCgroupDetect:230 : Detected mount/mapping 0:cpu at /cgroup in /22307 18:07:20.884: debug : virCgroupDetect:230 : Detected mount/mapping 1:cpuacct at /cgroup in /22307 18:07:20.884: debug : virCgroupDetect:230 : Detected mount/mapping 2:cpuset at /cgroup in /22307 18:07:20.884: debug : virCgroupDetect:230 : Detected mount/mapping 3:memory at /cgroup in /22307 18:07:20.884: debug : virCgroupDetect:230 : Detected mount/mapping 4:devices at /cgroup in /22307 18:07:20.884: debug : virCgroupDetect:230 : Detected mount/mapping 5:freezer at /cgroup in /22307 18:07:20.884: debug : virCgroupMakeGroup:450 : Make group /libvirt/lxc 18:07:20.884: debug : virCgroupMakeGroup:462 : Make controller /cgroup/22307/libvirt/lxc/ 18:07:20.976: debug : lxcContainerStart:832 : clone() returned, 22309 18:07:20.976: debug : virRun:809 : ip link set veth1 netns 22309 On Mon, Dec 7, 2009 at 4:20 AM, Daniel P. Berrange <berrange@redhat.com> wrote:
On Mon, Dec 07, 2009 at 03:02:53AM -0600, Tony Risinger wrote:
hello,
i am trying to use libvirt with LXC, and having some issues... everything seems ok when using lxc-* tools. host box is Arch Linux. ultimately i'm getting this error in the domain log:
..... 05:45:31.353: debug : lxcControllerMain:380 : EPOLLHUP from fd 7
i was getting this last night in #virt:
..... 20:49:57.545: error : lxcFdForward:230 : read of fd 7 failed: Input/output error libvir: Linux Container error : read of fd 7 failed: Input/output error
I believe this essentially says that the container has shutdown.
-----CONFIGURATION
# host ptmx symlinked to pts/ptmx [root@PHS-001 vps]# ls -l /dev/ptmx lrwxrwxrwx 1 root root 8 2009-12-08 04:40 /dev/ptmx -> pts/ptmx
# guest ptmx symlinked to pts/ptmx [root@PHS-001 vps]# ls -l /vps/dom/ubuntu/root/dev/ptmx lrwxrwxrwx 1 root root 8 2009-12-06 04:11 /vps/dom/ubuntu/root/dev/ptmx -> pts/ptmx
Avoid doing this - libvirt will set that up as part of the container bootstrapping processs.
# guest config... # i have tried the legacy <console type='pty' /> with same results # i dont fully understand this, why do i need to specify a host/source pty? [root@PHS-001 vps]# cat /vps/def/exec/sys/ubuntu.xml <domain type='lxc'> <name>ubuntu</name> <memory>500000</memory> <os> <type arch='i686'>exe</type> <init>/sbin/init</init> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <filesystem type='mount'> <source dir='/vps/dom/ubuntu/root'/> <target dir='/'/> </filesystem> <console type='pty'> <source path='/dev/pts/4'/>
Leave out the <source> here - that's auto-generated when the container starts
<target port='0'/> </console> </devices> </domain>
-----PROCEDURE
[root@PHS-001 vps]# LIBVIRT_DEBUG=1 libvirtd --daemon 05:42:46.121: debug : virInitialize:278 : register drivers .....
[root@PHS-001 vps]# virsh -c lxc:/// define /vps/def/exec/sys/ubuntu.xml Domain ubuntu defined from /vps/def/exec/sys/ubuntu.xml
[root@PHS-001 vps]# virsh -c lxc:/// define /vps/def/exec/sys/ubuntu.xml Domain ubuntu defined from /vps/def/exec/sys/ubuntu.xml
[root@PHS-001 vps]# virsh -c lxc:/// start ubuntu Domain ubuntu started
[root@PHS-001 vps]# virsh -c lxc:/// console ubuntu error: Unable to get domain status error: internal error Unable to get cgroup for ubuntu
-----LOGS
# /var/log/libvirt/lxc/ubuntu.log 05:45:31.126: debug : virCgroupMakeGroup:450 : Make group /libvirt/lxc 05:45:31.126: debug : virCgroupMakeGroup:462 : Make controller /cgroup/1534/libvirt/lxc/ 05:45:31.211: debug : lxcContainerStart:832 : clone() returned, 1536 05:45:31.353: debug : lxcControllerMain:380 : EPOLLHUP from fd 7
i've tried endless variations of the <devices> section, but i just cant seem to get anything going with libvirt/LXC once i move the root to a new location for a system container. same container works fine with lxc-* tools (although i manually make a bridge). any help is appreciated,
Rather that going straight for a full OS, try just setting up a trivial busybox root environment which just takes you intoa busybox shell.
eg, in /sbin/init just have
#!/sbin/busybox
sh
(Obviously install busybox in /sbin inside the root env too :-)
Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|
participants (2)
-
Daniel P. Berrange -
Tony Risinger