November 2009 - Devel - libvirt List Archives

[libvirt] Guestfwd support (round 3)
by Matthew Booth 05 Nov '09

05 Nov '09

This is substantially the same as the last set. I don't think I changed patches 1 and 2 at all. Patch 3 is updated to use a virBuffer as Rich Jones recommended. Patch 4 is updated slightly for the above change, and there are a couple of other trivial tidy ups in there. Patch 5 is new. QEMU's guestfwd only supports IPv4 addresses, so we check for that. Rich Jones also noted that guestfwd is specific to QEMU. If there's a good chance this same syntax might do something simililar in a different driver, I agree that changing the name would be a good idea. However, I'm not familiar enough with other hypervisors to be able to make a call on this. If nothing else does anything similar, I'd keep the QEMU name for clarity. Matt

3 17

[libvirt] [PATCH] LXC allow container to have ethN interfaces
by Ryota Ozaki 05 Nov '09

05 Nov '09

Current implementation of lxc driver creates vethN named interface(s) in the host and passes as it is to a container. The reason why it doesn't use ethN is due to the limitation that one namespace cannot have multiple iterfaces that have an identical name so that we give up creating ethN named interface in the host for the container. However, we should be able to allow the container to have ethN by changing the name after clone(CLONE_NEWNET). The patch simply does that and numberes to ethN with ascending order from zero with no concern for what vethN is named. So say if there is one interface, its name will be eth0. Note that this patch is based on top of the prior cleanup patches. --- src/lxc/lxc_container.c | 34 ++++++++++++++++++++++++---------- src/lxc/veth.c | 31 +++++++++++++++++++++++++++++++ src/lxc/veth.h | 1 + 3 files changed, 56 insertions(+), 10 deletions(-) diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c index 2419345..97b7903 100644 --- a/src/lxc/lxc_container.c +++ b/src/lxc/lxc_container.c @@ -225,26 +225,38 @@ static int lxcContainerWaitForContinue(int control) /** - * lxcContainerEnableInterfaces: + * lxcContainerRenameAndEnableInterfaces: * @nveths: number of interfaces * @veths: interface names * - * This function will enable the interfaces for this container. + * This function will rename the interfaces to ethN + * with id ascending order from zero and enable the + * renamed interfaces for this container. * * Returns 0 on success or nonzero in case of error */ -static int lxcContainerEnableInterfaces(unsigned int nveths, - char **veths) +static int lxcContainerRenameAndEnableInterfaces(unsigned int nveths, + char **veths) { int rc = 0; unsigned int i; + char *newname = NULL; for (i = 0 ; i < nveths ; i++) { - DEBUG("Enabling %s", veths[i]); - rc = vethInterfaceUpOrDown(veths[i], 1); - if (0 != rc) { + rc = virAsprintf(&newname, "eth%d", i); + if (rc < 0) goto error_out; - } + + DEBUG("Renaming %s to %s", veths[i], newname); + rc = setInterfaceName(veths[i], newname); + if (0 != rc) + goto error_out; + + DEBUG("Enabling %s", newname); + rc = vethInterfaceUpOrDown(newname, 1); + if (0 != rc) + goto error_out; + VIR_FREE(newname); } /* enable lo device only if there were other net devices */ @@ -252,6 +264,7 @@ static int lxcContainerEnableInterfaces(unsigned int nveths, rc = vethInterfaceUpOrDown("lo", 1); error_out: + VIR_FREE(newname); return rc; } @@ -757,8 +770,9 @@ static int lxcContainerChild( void *data ) if (lxcContainerWaitForContinue(argv->monitor) < 0) return -1; - /* enable interfaces */ - if (lxcContainerEnableInterfaces(argv->nveths, argv->veths) < 0) + /* rename and enable interfaces */ + if (lxcContainerRenameAndEnableInterfaces(argv->nveths, + argv->veths) < 0) return -1; /* drop a set of root capabilities */ diff --git a/src/lxc/veth.c b/src/lxc/veth.c index 8617cf7..ede85ce 100644 --- a/src/lxc/veth.c +++ b/src/lxc/veth.c @@ -247,3 +247,34 @@ int setMacAddr(const char* iface, const char* macaddr) error_out: return rc; } + +/** + * setInterfaceName + * @iface: name of device + * @new: new name of @iface + * + * Changes the name of the given device with the + * given new name using this command: + * ip link set @iface name @new + * + * Returns 0 on success or -1 in case of error + */ +int setInterfaceName(const char* iface, const char* new) +{ + int rc = -1; + const char *argv[] = { + "ip", "link", "set", iface, "name", new, NULL + }; + int cmdResult; + + if (NULL == iface || NULL == new) { + goto error_out; + } + + rc = virRun(NULL, argv, &cmdResult); + if (0 == rc) + rc = cmdResult; + +error_out: + return rc; +} diff --git a/src/lxc/veth.h b/src/lxc/veth.h index 8f2f514..8075a5e 100644 --- a/src/lxc/veth.h +++ b/src/lxc/veth.h @@ -21,5 +21,6 @@ int vethDelete(const char* veth); int vethInterfaceUpOrDown(const char* veth, int upOrDown); int moveInterfaceToNetNs(const char *iface, int pidInNs); int setMacAddr(const char* iface, const char* macaddr); +int setInterfaceName(const char* iface, const char* new); #endif /* VETH_H */ -- 1.6.2.5

2 1

[libvirt] [PATCH 0/3] LXC misc fixes and cleanups
by Ryota Ozaki 05 Nov '09

05 Nov '09

This patch series fix and cleanup over whole lxc codes. I want to clean up before adding more in them. Thanks, ozaki-r Ryota Ozaki (3): LXC fix wrong or out-of-date function descriptions LXC cleanup and fix lxcError LXC cleanup deep indentation in lxcDomainSetAutostart src/lxc/lxc_container.c | 85 +++++++++++----------- src/lxc/lxc_controller.c | 40 ++++++----- src/lxc/lxc_driver.c | 177 +++++++++++++++++++++++++--------------------- src/lxc/veth.c | 8 +- 4 files changed, 164 insertions(+), 146 deletions(-)

3 7

[libvirt] flush guest page cache and suspend?
by Marco Colombo 05 Nov '09

05 Nov '09

Hi, I'm new to this list. I've searched the archives (and google) but I haven't found an answer. Recently I moved to CentOS 5.4, with libvirt-0.6.3 and kvm-83. They are rather new compared to 5.3 ones, so I'm still investigating on the new capabilities. My guests disk images are LV single devices, /dev/vg_virt/<guestname>, usually with two partitions, the root fs and swap space. I'd like to run backups on the node only, taking snapshots of the LVs. I'm already doing that, actually. Everything works fine, using bacula (with one minor glitch, but that's for another list). Now I wonder if it makes sense to suspend the guest before creating the snapshot: virsh suspend <guestname> lvcreate --snapshot ... virsh resume <guestname> ... perform backup ... lvremove -f <the snapshot> but thinking about it a second time it seems it doesn't add anything to the equation, the filesystem is still potentially unclean, with data to be written still in the guest page cache. The filesystem is ext3, so it's not that bad (recovers a consistent state from the journal, with standard options even data-consistent, not just metadata-consistent). Yet it's like doing a backup of a (potentially badly) crashed filesystem. While I trust the recovery step of ext3, my feeling is that it can't be 100% reliable. I have (rarely) seen ext3 crash and ask for fsck at boot, journal or not (for truth's sake, I can't rule out an hard disk problem in those cases). So, first question: does the suspend command cause a flush in the guest OS (details: both guest and node are CentOS 5.4, hypervisor is qemu-kvm)? I guess not (otherwise I won't be here). So if not, what are the options to force the sync? Ideally, there should be a single atomic 'sync & suspend'. In practice, I can think of some workarounds: ssh <guest> -c sync, or the very old-fashioned way of enabling the 'sync' user and logging in from the serial console, or issuing a sysrq-s, again on the console. I'm interested in the latter, but I wasn't able to trigger the sysrq from either 'virsh console <guestname>' or 'screen `virsh ttyconsole <guestname>` (tried minicom, too). The serial console is on pty, I'm not even sure you can generate a break on a pty. (and yes, I remembered to sysctl -w kernel.sysrq=1 on the guest). I know XEN has 'xm sysrq', but this is kvm. Is there anything similar? I think it can be done if you invoke qemu-kvm from the command line with -nographics (it multiplexes the console and the monitor lines on stdin/out, and you can send a 'break' with C-a b I think, I've never tried). So question 2): is there a way to send a sysrq-s to the guest? My fallback plan is to try and map the serial line over telnet instead of pty, and the figure out a way to send the break (which I think is part of the telnet protocol) from the command line. I'd rather not mess with telnet and local port assignment to the guests, if not necessary. My really fallback plan is to revert to shutdown/snapshot/create, which is overkill for a daily backup. Question 3): does it _really_ make sense to try and sync the guest OS page cache before taking the snapshot? Or is it just me being paranoid? For reference, here's the qemu cmdline of one of the guests: /usr/libexec/qemu-kvm -S -M pc -m 512 -smp 1 -name wtitv -uuid 445d0fe5-c1b6-4baf-a186-da1fe021158c -monitor pty -pidfile /var/run/libvirt/qemu//wtitv.pid -boot c -drive file=/dev/vg_virt/wtitv,if=ide,index=0,boot=on -net nic,macaddr=00:16:3e:57:45:4f,vlan=0,model=e1000 -net tap,fd=14,script=,vlan=0,ifname=vnet0 -serial pty -parallel none -usb -usbdevice tablet -vnc 127.0.0.1:0 and here's the xml config file for libvirt, same guest: <domain type='kvm'> <name>wtitv</name> <uuid>445d0fe5-c1b6-4baf-a186-da1fe021158c</uuid> <memory>524288</memory> <currentMemory>524288</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='hd'/> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <features> <acpi/> </features> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='block' device='disk'> <source dev='/dev/vg_virt/wtitv'/> <target dev='hda' bus='ide'/> </disk> <interface type='bridge'> <mac address='00:16:3e:57:45:4f'/> <source bridge='br1'/> <model type='e1000'/> </interface> <console type='pty'> <target port='0'/> </console> <input type='tablet' bus='usb'/> <graphics type='vnc' autoport='yes'/> </devices> </domain> TIA, .TM.

2 2

[libvirt] [PATCH 0/2] CPU flags capabilities and domain configuration
by Jiri Denemark 05 Nov '09

05 Nov '09

Hi, These are two initial patches for CPU flags/masks support for libvirt. The first patch contains changes to schemas and describes semantics of new elements and attributes. The second patch introduces internal API functions for XML parsing and formating. Jiri Denemark (2): XML schema for CPU flags XML parsing/formating code for CPU flags docs/schemas/capability.rng | 30 ++++ docs/schemas/domain.rng | 49 ++++++ include/libvirt/virterror.h | 1 + src/Makefile.am | 9 +- src/conf/capabilities.c | 31 ++++- src/conf/capabilities.h | 6 + src/conf/cpu_conf.c | 345 +++++++++++++++++++++++++++++++++++++++++++ src/conf/cpu_conf.h | 110 ++++++++++++++ src/conf/domain_conf.c | 15 ++ src/conf/domain_conf.h | 2 + src/libvirt_private.syms | 8 + src/util/virterror.c | 3 + 12 files changed, 606 insertions(+), 3 deletions(-) create mode 100644 src/conf/cpu_conf.c create mode 100644 src/conf/cpu_conf.h

2 4

[libvirt] F12beta guest will not connect to LAN via bridge
by Gerry Reno 04 Nov '09

04 Nov '09

Setup: HOST: F11 x86_64 GUEST: F12beta x86_64 I have a number of guests setup on this host and all connect without a problem with the 'br0' bridge on the host. I created a new guest and loaded F12beta on it. I defined it to also use 'br0' networking but this guest cannot ping anything on the LAN. All the other guests have no problems communicating to addresses on the LAN. Details: ### on HOST: # brctl showmacs br0 port no mac addr is local? ageing timer 1 00:0b:82:11:bc:cb no 15.88 3 00:0c:01:30:50:00 no 16.37 2 00:0c:01:40:50:00 no 2.51 1 00:0c:29:e3:bc:ee no 0.49 1 00:18:f8:48:27:15 no 2.51 1 00:18:f8:9b:ba:b4 no 116.39 1 00:18:f8:9b:ba:b5 no 20.60 1 00:1a:4d:5e:f6:36 no 156.43 1 00:24:1d:19:05:cf yes 0.00 3 06:1d:1d:7a:31:9b yes 0.00 2 06:ba:11:dd:7b:08 yes 0.00 1 54:52:00:24:5e:cf no 28.93 # EXISTING GUEST: network interface in xml file: <interface type='bridge'> <mac address='00:0c:01:30:50:00'/> <source bridge='br0'/> <target dev='vnet0'/> <model type='virtio'/> </interface> # NEW GUEST: network interface in xml file: <interface type='bridge'> <mac address='00:0c:01:40:50:00'/> <source bridge='br0'/> <target dev='vnet0'/> <model type='virtio'/> </interface> ### on EXISTING GUEST: DEVICE=eth0 ONBOOT=yes BOOTPROTO=static HWADDR=00:0c:01:30:50:00 IPADDR=192.168.1.200 NETMASK=255.255.255.0 NETWORK=192.168.1.0 ### on NEW GUEST: DEVICE=eth0 ONBOOT=yes BOOTPROTO=static HWADDR=00:0c:01:40:50:00 IPADDR=192.168.1.210 NETMASK=255.255.255.0 GATEWAY=192.168.1.1 NETWORK=192.168.1.0 TYPE=Ethernet IPV6INIT=no USERCTL=no ### on EXISTING GUEST: # ping 192.168.1.1 succeeds ### on NEW GUEST: # ping 192.168.1.1 fails with Destination Host Unreachable Is there something else I need to configure in F12beta to get this working? -Gerry

1 2

[libvirt] Minor doc fix for <clock>
by Cole Robinson 04 Nov '09

04 Nov '09

FYI, I just pushed this minor docs fix: commit 45bd290b64c9f911ebb6e0990f8fcef249576436 Author: Cole Robinson <crobinso(a)redhat.com> Date: Wed Nov 4 13:26:28 2009 -0500 docs: <clock> property is 'offset', not 'sync' diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 53cd960..d26ce75 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -300,7 +300,7 @@ <dl> <dt><code>clock</code></dt> - <dd>The <code>sync</code> attribute takes either "utc" or + <dd>The <code>offset</code> attribute takes either "utc" or "localtime" to specify how the guest clock is initialized in relation to the host OS. </dd> Thanks, Cole

1 0

[libvirt] ESX with Python binding
by Dave Bryson 04 Nov '09

04 Nov '09

I'm new to libvirt. Is it possible to use the python binding with the latest ESX support? If so, does anyone have a simple example I can try? Thanks in advance! Dave

3 2

[libvirt] [RFC][PATCH] LXC allow a container to have ethN named interfaces
by Ryota Ozaki 04 Nov '09

04 Nov '09

Note that this patch is not mature yet and still proof- of-concept prototype, although it actually works. Current implementation of lxc driver creates vethN named interface(s) in the host and passes as it is to a container. The reason why it doesn't use ethN is due to the limitation that one namespace cannot have multiple iterfaces that have an identical name so that we give up creating ethN named interface in the host for the container. However, we should be able to allow the container to have ethN by changing the name after clone(CLONE_NEWNET) in controller. To this end, this patch extends --veth argument of controller to be able to have two names; one is the name of a created veth, and the other is a new name. The format is: --veth veth1,eth0 --veth veth3,eth1 ... where veth1 is old name and eth0 is new one. The implementation also allows a single name, in that case, controller does not do nothing for the interface, which is the original behavior. The numbering of the new names is simply ascending order from zero. So if there is one interface, its name will be eth0. --- src/lxc/lxc_container.c | 23 ++++++++++++++++++----- src/lxc/lxc_container.h | 1 + src/lxc/lxc_controller.c | 30 ++++++++++++++++++++++++++++-- src/lxc/lxc_driver.c | 30 +++++++++++++++++++++++++----- src/lxc/veth.c | 20 ++++++++++++++++++++ src/lxc/veth.h | 1 + 6 files changed, 93 insertions(+), 12 deletions(-) diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c index f4381e7..f065788 100644 --- a/src/lxc/lxc_container.c +++ b/src/lxc/lxc_container.c @@ -84,6 +84,7 @@ struct __lxc_child_argv { virDomainDefPtr config; unsigned int nveths; char **veths; + char **newveths; int monitor; char *ttyPath; }; @@ -233,14 +234,23 @@ static int lxcContainerWaitForContinue(int control) * Returns 0 on success or nonzero in case of error */ static int lxcContainerEnableInterfaces(unsigned int nveths, - char **veths) + char **veths, char **newveths) { int rc = 0; unsigned int i; for (i = 0 ; i < nveths ; i++) { - DEBUG("Enabling %s", veths[i]); - rc = vethInterfaceUpOrDown(veths[i], 1); + char *veth = veths[i]; + if (newveths[i] && !STREQ(veths[i], newveths[i])) { + DEBUG("changing %s", veths[i]); + rc = setInterfaceName(veths[i], newveths[i]); + if (0 != rc) { + goto error_out; + } + veth = newveths[i]; + } + DEBUG("Enabling %s", veth); + rc = vethInterfaceUpOrDown(veth, 1); if (0 != rc) { goto error_out; } @@ -758,7 +768,9 @@ static int lxcContainerChild( void *data ) return -1; /* enable interfaces */ - if (lxcContainerEnableInterfaces(argv->nveths, argv->veths) < 0) + if (lxcContainerEnableInterfaces(argv->nveths, + argv->veths, + argv->newveths) < 0) return -1; /* drop a set of root capabilities */ @@ -786,6 +798,7 @@ static int userns_supported(void) int lxcContainerStart(virDomainDefPtr def, unsigned int nveths, char **veths, + char **newveths, int control, char *ttyPath) { @@ -793,7 +806,7 @@ int lxcContainerStart(virDomainDefPtr def, int flags; int stacksize = getpagesize() * 4; char *stack, *stacktop; - lxc_child_argv_t args = { def, nveths, veths, control, ttyPath }; + lxc_child_argv_t args = { def, nveths, veths, newveths, control, ttyPath }; /* allocate a stack for the container */ if (VIR_ALLOC_N(stack, stacksize) < 0) { diff --git a/src/lxc/lxc_container.h b/src/lxc/lxc_container.h index a1dd5a1..d796380 100644 --- a/src/lxc/lxc_container.h +++ b/src/lxc/lxc_container.h @@ -49,6 +49,7 @@ int lxcContainerSendContinue(int control); int lxcContainerStart(virDomainDefPtr def, unsigned int nveths, char **veths, + char **newveths, int control, char *ttyPath); diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c index 545f718..75dd73a 100644 --- a/src/lxc/lxc_controller.c +++ b/src/lxc/lxc_controller.c @@ -493,6 +493,7 @@ static int lxcControllerRun(virDomainDefPtr def, unsigned int nveths, char **veths, + char **newveths, int monitor, int client, int appPty) @@ -603,6 +604,7 @@ lxcControllerRun(virDomainDefPtr def, if ((container = lxcContainerStart(def, nveths, veths, + newveths, control[1], containerPtyPath)) < 0) goto cleanup; @@ -649,6 +651,7 @@ int main(int argc, char *argv[]) char *name = NULL; int nveths = 0; char **veths = NULL; + char **newveths = NULL; int monitor = -1; int appPty = -1; int bg = 0; @@ -691,10 +694,33 @@ int main(int argc, char *argv[]) virReportOOMError(NULL); goto cleanup; } - if ((veths[nveths++] = strdup(optarg)) == NULL) { + if (VIR_REALLOC_N(newveths, nveths+1) < 0) { virReportOOMError(NULL); goto cleanup; } + { + char *sep = strchr(optarg, ','); + if (sep) { + *sep = '\0'; + sep++; + if ((veths[nveths] = strdup(optarg)) == NULL) { + virReportOOMError(NULL); + goto cleanup; + } + if ((newveths[nveths] = strdup(sep)) == NULL) { + virReportOOMError(NULL); + goto cleanup; + } + nveths++; + } else { + if ((veths[nveths] = strdup(optarg)) == NULL) { + virReportOOMError(NULL); + goto cleanup; + } + newveths[nveths] = NULL; + nveths++; + } + } break; case 'c': @@ -803,7 +829,7 @@ int main(int argc, char *argv[]) goto cleanup; } - rc = lxcControllerRun(def, nveths, veths, monitor, client, appPty); + rc = lxcControllerRun(def, nveths, veths, newveths, monitor, client, appPty); cleanup: diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c index 4f0787b..1323cff 100644 --- a/src/lxc/lxc_driver.c +++ b/src/lxc/lxc_driver.c @@ -693,13 +693,15 @@ static int lxcVMCleanup(virConnectPtr conn, static int lxcSetupInterfaces(virConnectPtr conn, virDomainDefPtr def, unsigned int *nveths, - char ***veths) + char ***veths, + char ***newveths) { int rc = -1, i; char *bridge = NULL; char parentVeth[PATH_MAX] = ""; char containerVeth[PATH_MAX] = ""; brControl *brctl = NULL; + char *newveth; if (brInit(&brctl) != 0) return -1; @@ -744,10 +746,20 @@ static int lxcSetupInterfaces(virConnectPtr conn, if (NULL == def->nets[i]->ifname) { def->nets[i]->ifname = strdup(parentVeth); } + if (VIR_REALLOC_N(*veths, (*nveths)+1) < 0) goto error_exit; - if (((*veths)[(*nveths)++] = strdup(containerVeth)) == NULL) + if (VIR_REALLOC_N(*newveths, (*nveths)+1) < 0) + goto error_exit; + + if (((*veths)[*nveths] = strdup(containerVeth)) == NULL) + goto error_exit; + if (virAsprintf(&newveth, "eth%d", i) < 0) goto error_exit; + if (((*newveths)[*nveths] = strdup(newveth)) == NULL) + goto error_exit; + (*nveths)++; + VIR_FREE(newveth); if (NULL == def->nets[i]->ifname) { lxcError(NULL, NULL, VIR_ERR_INTERNAL_ERROR, @@ -906,6 +918,7 @@ static int lxcControllerStart(virConnectPtr conn, virDomainObjPtr vm, int nveths, char **veths, + char **newveths, int appPty, int logfd) { @@ -1029,7 +1042,13 @@ static int lxcControllerStart(virConnectPtr conn, for (i = 0 ; i < nveths ; i++) { ADD_ARG_LIT("--veth"); - ADD_ARG_LIT(veths[i]); + if (newveths[i]) { + if (virAsprintf(&tmp, "%s,%s", veths[i], newveths[i]) < 0) + goto no_memory; + ADD_ARG_LIT(tmp); + } else { + ADD_ARG_LIT(veths[i]); + } } ADD_ARG(NULL); @@ -1107,6 +1126,7 @@ static int lxcVmStart(virConnectPtr conn, int logfd = -1; unsigned int nveths = 0; char **veths = NULL; + char **newveths = NULL; if ((r = virFileMakePath(driver->logDir)) < 0) { virReportSystemError(conn, r, @@ -1135,7 +1155,7 @@ static int lxcVmStart(virConnectPtr conn, VIR_FREE(parentTtyPath); } - if (lxcSetupInterfaces(conn, vm->def, &nveths, &veths) != 0) + if (lxcSetupInterfaces(conn, vm->def, &nveths, &veths, &newveths) != 0) goto cleanup; /* Persist the live configuration now we have veth & tty info */ @@ -1152,7 +1172,7 @@ static int lxcVmStart(virConnectPtr conn, if (lxcControllerStart(conn, vm, - nveths, veths, + nveths, veths, newveths, parentTty, logfd) < 0) goto cleanup; diff --git a/src/lxc/veth.c b/src/lxc/veth.c index b15df8d..fbd1195 100644 --- a/src/lxc/veth.c +++ b/src/lxc/veth.c @@ -247,3 +247,23 @@ int setMacAddr(const char* iface, const char* macaddr) error_out: return rc; } + +int setInterfaceName(const char* iface, const char* new) +{ + int rc = -1; + const char *argv[] = { + "ip", "link", "set", iface, "name", new, NULL + }; + int cmdResult; + + if (NULL == iface || NULL == new) { + goto error_out; + } + + rc = virRun(NULL, argv, &cmdResult); + if (0 == rc) + rc = cmdResult; + +error_out: + return rc; +} diff --git a/src/lxc/veth.h b/src/lxc/veth.h index 8f2f514..8075a5e 100644 --- a/src/lxc/veth.h +++ b/src/lxc/veth.h @@ -21,5 +21,6 @@ int vethDelete(const char* veth); int vethInterfaceUpOrDown(const char* veth, int upOrDown); int moveInterfaceToNetNs(const char *iface, int pidInNs); int setMacAddr(const char* iface, const char* macaddr); +int setInterfaceName(const char* iface, const char* new); #endif /* VETH_H */ -- 1.6.2.5

2 4

[libvirt] starting vm using virsh somewhat fails
by Ricardo Tiago 04 Nov '09

04 Nov '09

Hi all, I have started a vm using virsh create domain.xml and it starts for a second and then its destroyed automatically. When I do xm create -f <xm cfg> it works fine. I don't know if this is relevant but virsh net-list --all Name State Autostart ----------------------------------------- default inactive yes virsh net-start default error: Failed to start network default error: Failed to open file '/etc/sysconfig/system-config-firewall': No such file or directory Can this be the problem? Why do I need /etc/sysconfig/system-config-firewall? Domain XML Description: (converted from a xm cfg file) <domain type='xen'> <name>rtiago_test</name> <uuid>8f07fe28-753f-2729-d76d-bdbd892f949a</uuid> <memory>2560000</memory> <currentMemory>200000</currentMemory> <vcpu>8</vcpu> <bootloader>/usr/bin/pygrub</bootloader> <os> <type arch='x86_64' machine='xenpv'>linux</type> <cmdline>rtiago</cmdline> </os> <clock offset='utc'/> <on_poweroff>restart</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <disk type='file' device='disk'> <driver name='file'/> <source file='/images/fc-6.img'/> <target dev='xvda1' bus='xen'/> </disk> </domain>

1 1