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[libvirt] LXC container with user namespace and root fs on loop device - how it's supposed to work?
by Dmitry Guryanov 19 Mar '15

19 Mar '15

Hello, It's not possible to start LXC container inside user namespace with root filesystem on loop device, because it tries to mount root FS from container's user namespace (lxcContainerSetupPivotRoot) and gets EPERM: 2015-03-19 12:48:18.545+0000: 1: debug : lxcContainerChild:2278 : Tearing down container Failed to mount device /dev/loop0 to /var/run/libvirt/lxc/instance-0000000b.root: Operation not permitted So I wonder, if someone tried to run LXC container with such configuration with success. Here is my config: <domain type='lxc'> <name>instance-0000000b</name> <uuid>d918c415-0a00-4c12-896e-19e4711111d3</uuid> <memory unit='KiB'>524288</memory> <currentMemory unit='KiB'>524288</currentMemory> <cputune> <shares>1024</shares> </cputune> <os> <type arch='x86_64'>exe</type> <init>/sbin/init</init> <cmdline>console=tty0 console=ttyS0</cmdline> </os> <idmap> <uid start='0' target='10000' count='1000'/> <gid start='0' target='10000' count='1000'/> </idmap> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='file' accessmode='passthrough'> <driver type='loop' format='raw'/> <source file='/root/2.img'/> <target dir='/'/> </filesystem> <console type='pty'> <target type='lxc' port='0'/> </console> </devices> </domain> -- Dmitry Guryanov

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[libvirt] [PATCH v2 0/6] parallels: implement managed save
by Dmitry Guryanov 19 Mar '15

19 Mar '15

This patch series is intended to implement all needed code, so that suspend/resume in openstack nova will work. It implements .domainHasManagedSaveImage, .domainManagedSave and .domainManagedSaveRemove functions. Also it adds workaround to parallelsDomainDefineXMLFlags to skip applying configuration, if VM is in managed save state and config hasn't been changed, because it's not possible to change VM config in suspended state in PCS. Changes in v2: * rebased Dmitry Guryanov (6): parallels: fix headers in parallels_sdk.h parallels: split prlsdkDomainChangeState function parallels: implement virDomainManagedSave parallels: report, that cdroms are readonly parallels: add controllers in prlsdkLoadDomain parallels: fix virDomainDefineXML for domain in saved state src/parallels/parallels_driver.c | 101 +++++++++++++++++++++++++++++++++++++-- src/parallels/parallels_sdk.c | 65 ++++++++++++++++++------- src/parallels/parallels_sdk.h | 17 +++++-- 3 files changed, 157 insertions(+), 26 deletions(-) -- 2.1.0

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[libvirt] USB hostdev de/reattaching
by Martin Polednik 19 Mar '15

19 Mar '15

Hello, according to libvirt documentation, when using hostdev with USB device "...the user is responsible to call virNodeDeviceDettach (or virsh nodedev-detach) before starting the guest...". In libvirt-1.2.13-1.el7.x86_64, this leads to virsh nodedev-detach usb_usb1 error: Failed to detach device usb_usb1 error: invalid argument: device usb_usb1 is not a PCI device The failure is most probably caused in qemuNodeDeviceDeta where qemuNodeDeviceGetPCIInfo is called. Is it a bug, or usb hostdev can be done without detaching/reattaching? Thanks, mpolednik

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Re: [libvirt] [SOLVED] Domain XML isn't dumping full backing chain
by Deepak Shetty 19 Mar '15

19 Mar '15

On Wed, Mar 18, 2015 at 5:33 PM, Shanzhi Yu <shyu(a)redhat.com> wrote: > > > ------------------------------ > > *From: *"Deepak Shetty" <dpkshetty(a)gmail.com> > *To: *libvir-list(a)redhat.com > *Sent: *Wednesday, March 18, 2015 7:19:05 PM > *Subject: *[libvirt] Domain XML isn't dumping full backing chain > > > Hi, > I am using libvirt version 1.2.9.2 on F21 and i am unable to get the > complete backing chain info in the virsh dumpxml output. Details below : > > *My backing chain per qemu-img :* > > [stack@devstack-f21 test]$ qemu-img info --backing-chain snap4.qcow2 > image: snap4.qcow2 > file format: qcow2 > virtual size: 1.0G (1073741824 bytes) > disk size: 196K > cluster_size: 65536 > backing file: ./snap3.qcow2 > Format specific information: > compat: 1.1 > lazy refcounts: false > > image: ./snap3.qcow2 > file format: qcow2 > virtual size: 1.0G (1073741824 bytes) > disk size: 196K > cluster_size: 65536 > backing file: ./snap2.qcow2 (actual path: ././snap2.qcow2) > Format specific information: > compat: 1.1 > lazy refcounts: false > > image: ././snap2.qcow2 > file format: qcow2 > virtual size: 1.0G (1073741824 bytes) > disk size: 196K > cluster_size: 65536 > backing file: ./snap1.qcow2 (actual path: ./././snap1.qcow2) > Format specific information: > compat: 1.1 > lazy refcounts: false > > image: ./././snap1.qcow2 > file format: qcow2 > virtual size: 1.0G (1073741824 bytes) > disk size: 196K > cluster_size: 65536 > backing file: ./base.qcow2 (actual path: ././././base.qcow2) > Format specific information: > compat: 1.1 > lazy refcounts: false > > image: ././././base.qcow2 > file format: qcow2 > virtual size: 1.0G (1073741824 bytes) > disk size: 196K > cluster_size: 65536 > Format specific information: > compat: 1.1 > lazy refcounts: false > > If you want prepare the backing chain yourself, you should add "-o > backing_fmt=$farmat" options, > like "qemu-img create -f qcow2 base.s1 -b base.qcow2 -o backing_fmt=qcow2" > Thanks, it works after I did the above thanx, deepak

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[libvirt] [PATCH] qemu: fix sometimes error overwrite when we fail to start/migrate/restore
by Luyao Huang 19 Mar '15

19 Mar '15

https://bugzilla.redhat.com/show_bug.cgi?id=1196934 When start/migrate/restore a vm failed, libvirt will try to catch the log in /var/log/libvirt/qemu/vm.log and output them before. However we add a check in qemuDomainObjExitMonitor after commit dc2fd51f, this will overwrite the error set in priv->mon which has set by qemuMonitorIO (a qemu monitor I/O event callback function). Add a check in qemuDomainObjExitMonitor, if there is an error have been set by other function, we won't overwrite it. Signed-off-by: Luyao Huang <lhuang(a)redhat.com> --- src/qemu/qemu_domain.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 2eacef2..41d1263 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -1609,8 +1609,9 @@ int qemuDomainObjExitMonitor(virQEMUDriverPtr driver, { qemuDomainObjExitMonitorInternal(driver, obj); if (!virDomainObjIsActive(obj)) { - virReportError(VIR_ERR_OPERATION_FAILED, "%s", - _("domain is no longer running")); + if (!virGetLastError()) + virReportError(VIR_ERR_OPERATION_FAILED, "%s", + _("domain is no longer running")); return -1; } return 0; -- 1.8.3.1

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[libvirt] [PATCH v2 0/2] network_conf: check if bridge exists on host for user created bridges
by Shivaprasad G Bhat 19 Mar '15

19 Mar '15

The patch fixes the below problem. ============================== If the bridge name is not mentioned in the <network> xml, the bridge name is auto generated from virNetworkAllocateBridge(). If the default template named bridge is created manually by a user, the bridge start will fail with "File exists". bash-4.3$ sudo brctl addbr virbr1 bash-4.3$ brctl show bridge name bridge id STP enabled interfaces br0 8000.000000000000 no virbr0 8000.525400a91d03 yes virbr0-nic virbr1 8000.000000000000 no bash-4.3$ sudo virsh net-list --all Name State Autostart Persistent ---------------------------------------------------------- default active no yes bash-4.3$ cat /tmp/isolated # Notice that the <bridge> intentionally not given. <network> <name>isolated</name> <forward/> <ip address="192.168.123.1" netmask="255.255.255.0"> <dhcp> <range start="192.168.123.2" end="192.168.123.254"/> </dhcp> </ip> </network> bash-4.3$ sudo virsh net-create /tmp/isolated error: Failed to create network from isolated error: Unable to create bridge virbr1: File exists =============================== --- Shivaprasad G Bhat (2): cleanup conf/device_conf.h reference from util/virnetdev.h network_conf: check if bridge exists on host for user created bridges src/Makefile.am | 3 +-- src/conf/device_conf.h | 21 +-------------------- src/conf/network_conf.c | 11 +++++++++-- src/util/virnetdev.h | 21 ++++++++++++++++++++- 4 files changed, 31 insertions(+), 25 deletions(-) -- Signature

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[libvirt] [PATCH v2] doc: Fix doc for backingStore
by Deepak Shetty 19 Mar '15

19 Mar '15

I spent quite some time figuring that backingStore info isn't included in the dom xml, unless guest is up and running. Hopefully putting that in the doc should help. This patch adds that info to the doc. Signed-off-by: Deepak C Shetty <deepakcs(a)redhat.com> --- docs/formatdomain.html.in | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index ab51982..a41c2c6 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -2113,7 +2113,12 @@ and only used for output to describe the detected backing chains. <span class="since">Since 1.2.4</span>. An empty <code>backingStore</code> element means the sibling source is - self-contained and is not based on any backing store. The following + self-contained and is not based on any backing store. Note that + <code>backingStore</code> info is included in the output only when + the guest is up and running, otherwise it's not included. For accurate + <code>backingStore</code> info, when using external snapshot with the + destination of a existing file, the snapshot must be created with + backing file format specified in the metadata. The following attributes and sub-elements are supported in <code>backingStore</code>: <dl> -- 1.9.3

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[libvirt] [PATCH] libxl: Don't overwrite errors from xenconfig
by Jim Fehlig 19 Mar '15

19 Mar '15

When converting domXML from native, the libxl driver was overwriting useful errors from the xenconfig parsing code with a useless, generic error. E.g. "internal error: parsing xm config failed" vs "internal error: config value usbdevice was malformed". Remove the redundant (and useless) error reporting in the libxl driver. Signed-off-by: Jim Fehlig <jfehlig(a)suse.com> --- src/libxl/libxl_driver.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c index e555ca4..1c1af79 100644 --- a/src/libxl/libxl_driver.c +++ b/src/libxl/libxl_driver.c @@ -2222,22 +2222,16 @@ libxlConnectDomainXMLFromNative(virConnectPtr conn, goto cleanup; if (!(def = xenParseXL(conf, cfg->caps, - cfg->verInfo->xen_version_major))) { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("parsing xl config failed")); + cfg->verInfo->xen_version_major))) goto cleanup; - } } else if (STREQ(nativeFormat, LIBXL_CONFIG_FORMAT_XM)) { if (!(conf = virConfReadMem(nativeConfig, strlen(nativeConfig), 0))) goto cleanup; if (!(def = xenParseXM(conf, cfg->verInfo->xen_version_major, - cfg->caps))) { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("parsing xm config failed")); + cfg->caps))) goto cleanup; - } } else if (STREQ(nativeFormat, LIBXL_CONFIG_FORMAT_SEXPR)) { /* only support latest xend config format */ if (!(def = xenParseSxprString(nativeConfig, -- 1.8.4.5

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[libvirt] [PATCH] Add vircgroupdata dir to tests/Makefile.am
by Nehal J Wani 18 Mar '15

18 Mar '15

The folder vircgroupdata was introduced in commit 2dbfa716 as part of the test suite for virCgroupDetectMounts --- tests/Makefile.am | 1 + 1 file changed, 1 insertion(+) diff --git a/tests/Makefile.am b/tests/Makefile.am index 9277c13..27cee63 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -128,6 +128,7 @@ EXTRA_DIST = \ storagevolxml2xmlout \ sysinfodata \ test-lib.sh \ + vircgroupdata \ vircaps2xmldata \ vboxsnapshotxmldata \ virsh-uriprecedence \ -- 2.1.0

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[libvirt] [PATCH v3 4/4] migration: Expose 'cancelling' status to user
by zhanghailiang 18 Mar '15

18 Mar '15

'cancelling' status is introduced by commit 51cf4c1a, which is mainly avoid possible starting a new migration process while the previous one still exist. But we don't expose this status to user, instead by return a 'active' state. Here, we expose it to the user (such as libvirt), 'cancelling' status only occurs for a short window before the migration aborts, so for users, if they cancell a migration process, it will observe 'cancelling' status occasionally. Signed-off-by: zhanghailiang <zhang.zhanghailiang(a)huawei.com> Cc: libvir-list(a)redhat.com --- migration/migration.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/migration/migration.c b/migration/migration.c index 035e005..a57928d 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -179,13 +179,11 @@ MigrationInfo *qmp_query_migrate(Error **errp) break; case MIGRATION_STATUS_SETUP: info->has_status = true; - info->status = MIGRATION_STATUS_SETUP; info->has_total_time = false; break; case MIGRATION_STATUS_ACTIVE: case MIGRATION_STATUS_CANCELLING: info->has_status = true; - info->status = MIGRATION_STATUS_ACTIVE; info->has_total_time = true; info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - s->total_time; @@ -221,7 +219,6 @@ MigrationInfo *qmp_query_migrate(Error **errp) get_xbzrle_cache_stats(info); info->has_status = true; - info->status = MIGRATION_STATUS_COMPLETED; info->has_total_time = true; info->total_time = s->total_time; info->has_downtime = true; @@ -243,13 +240,12 @@ MigrationInfo *qmp_query_migrate(Error **errp) break; case MIGRATION_STATUS_FAILED: info->has_status = true; - info->status = MIGRATION_STATUS_FAILED; break; case MIGRATION_STATUS_CANCELLED: info->has_status = true; - info->status = MIGRATION_STATUS_CANCELLED; break; } + info->status = s->state; return info; } -- 1.7.12.4

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