[libvirt] Java bindings
by Alejandro Berna Juan
Hi all, I'm Alejandro Berna from i2CAT (a non-profit foundation in
Barcelona, Spain, www.i2cat.net). I'm collaborating in a Europena project
called Federica ( www.fp7-*federica*.eu ). One of the branch of this project
is to permit virtualization of different hosts in the Federica test-bed. We
are doing some studies about the different management interfaces of Xen. Our
objective is to create a software remote client for Xen tool (in java if
it's possible) that can do (general functionalities):
- Create virtual machines assigning virtual interfaces.
- Permit choose the OS assigned to this virtual machine
- Install new applications to be tested in the virtual machines
- Configure a vm to become a router and permit to configure this router as
it was a physical router.
All these actions have to be performed remotelly. I have not found too much
information about libvrt but I think that can be usefull for our achieves.
If you agree that with libvrt we can perform these actions, maybe I can
build the java bindings for libvrt inside the Federica work. I'm waiting for
your opinions, thank you,
--
Alejandro Berna Juan
alejandro.berna(a)i2cat.net
15 years, 8 months
[libvirt] [PATCH/RFC]: hostdev passthrough support
by Guido Günther
Hi,
attached is some basic support for host device passthrough. It enables
you to passthrough usb devices in qemu/kvm via:
<devices>
<hostdev type='usb' vendor='0204' product='6025'/>
<hostdev type='usb' bus='001' device='007'/>
</devices>
I didn't implement unplug yet since this needs some modifications to
qemu/kvm to be able to identify the correct device to unplug.
Does this look reasonable?
-- Guido
15 years, 9 months
[libvirt] default networking issues
by Bryan Kearney
Need some help about where to look next. I am running a Fedora 9
machine, up to date on the releaed rpms. SELinux is permissive, iptables
is stopped. I have followed the instructions for NAT forwarding [1].
When I launch a guest in virt manager it uses the default network, and
is assigned an IP address in the 192.168.122 space. It can do dns
resolution, but can not wget a known website (www.cnn.com). From my host
machine, I can ssh into the guest.
Where is the next place I should look. Is the fact that I am running in
a corporate network causing me issues?
Thanks!
-- bk
[1]
http://wiki.libvirt.org/page/Networking#NAT_forwarding_.28aka_.22virtual_...
15 years, 9 months
[libvirt] [PATCH] storage pool discovery
by David Lively
Hi -
The attached patch implements virConnectDiscoverStoragePools mostly as
specified by Daniel Berrange in:
http://www.redhat.com/archives/libvir-list/2008-February/msg00107.html
Daniel wasn't happy with the interface for this function because it
wasn't sufficiently general, so it currently doesn't exist. I've
attempted to generalize his proposed interface by changing the
"hostname" argument to a "srcSpec" argument, which is intended to be a
XML storage pool <source> element. Note that srcSpec is not necessary
for some (local) pool types.
For example, to discover existing LVM volume groups, there's no need
to specify a source:
virsh # pool-discover logical
While discovering nfs shares requires a <source> document to specify
the host to query:
virsh # pool-discover netfs "<source><host name='share' /></source>"
Currently (i.e., in this patch) I've implemented discovery support
only for the "logical" and "netfs" pools. I plan on covering the other
types once we've agreed upon the API. While this patch is rather large,
the vast majority of it is "generic" (not specific to any particular
type of storage pool) code, which I mostly took from Daniel's
submission. I could easily break the storage-pool-type-specific pieces
into separate patches, but those changes are already segregated into the
appropriate storage_backend_ files.
* Known Issues *
I made the virsh interface take a XML string rather than a filename.
I found it convenient, but AFAIK the rest of the commands that take XML
take it from a file, so perhaps that should be changed (just let me know
what you'd prefer).
I realize the description of srcSpec is kind of fuzzy. For instance,
for netfs discovery, the <source> must have a <host> element (to specify
the host to query), but shouldn't have a <dir> element since the
exported dirs are exactly what we're trying to discover in this case.
So this really needs to be documented accurately for each storage pool
type. (Where?)
Finally, there's an underspecification issue. The XML pool
descriptions returned are supposed to be usable as valid input to
virStoragePoolDefineXML. But these descriptions include some data (pool
name, target path) that isn't specified by the discover input or the
discovered resources. For now, I'm making up a somewhat arbitrary pool
name (logical: VolGroup name, netfs: last component of export path).
And I don't even specify <target><path> in the "netfs" discovery output
(which means it's not valid input to virStoragePoolDefineXML until a
target path is added).
Dave
15 years, 9 months
[libvirt] fully virtualized xen guest question
by Christoph Höger
Hi,
I am running XEN on an debian etch. For clustering purposes I wanted to
boot fedora as virtual machine.
That works (except for nfs mounts) fine using the paravortualization
features.
But fully virtulalized guests do not even boot, I do not get any
sensefull error message, my config file looks like:
<domain type='xen'>
<name>werewolf</name>
<os>
<type>hvm</type>
<loader>/usr/lib/xen-3.0.3-1/boot/hvmloader</loader>
<kernel>/data/virtual/kernel/kvm1/vmlinuz-2.6.18-6-amd64</kernel>
<initrd>/data/virtual/kernel/kvm1/initrd.img-2.6.18-6-amd64</initrd>
<cmdline>root=/dev/hda1</cmdline>
</os>
<memory>524M</memory>
<vcpu>1</vcpu>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='file'>
<source file='/tmp/werewolf.img.plb13810'/>
<target dev='hda1' bus='xen'/>
</disk>
<interface type='bridge'>
<source bridge='virbr1'/>
</interface>
</devices>
<features>
<acpi/>
</features>
</domain>
<domain type='xen'>
<name>werewolf</name>
<os>
<type>hvm</type>
<loader>/usr/lib/xen-3.0.3-1/boot/hvmloader</loader>
<kernel>/data/virtual/kernel/kvm1/vmlinuz-2.6.18-6-amd64</kernel>
<initrd>/data/virtual/kernel/kvm1/initrd.img-2.6.18-6-amd64</initrd>
<cmdline>root=/dev/hda1</cmdline>
</os>
<memory>524M</memory>
<vcpu>1</vcpu>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='file'>
<source file='/tmp/werewolf.img.plb13810'/>
<target dev='hda1' bus='xen'/>
</disk>
<interface type='bridge'>
<source bridge='virbr1'/>
</interface>
</devices>
<features>
<acpi/>
</features>
</domain>
all I get when tryin virsh create is:
xend_post: error from xen daemon: (xend.err "Error creating domain: (0,
'Error')")
Whats wrong?
15 years, 9 months
[libvirt] PATCH: Support container XML enhancements
by Daniel P. Berrange
This is something I previously submitted as part of one of the LXC
patches, but I figure it makes sense on its own, since OpenVZ needs
this now too.
This adds two new XML elements to the domain XML format:
- An <init> block within <os> allowing specification of the path for
a binary to run when starting the container - aka 'init' by any other
name. First we also specify that all containers will use an OS
type of 'exe' - as in executable - the container equivalent of 'hvm'
<os>
<type>exe</type>
<init>/sbin/init</init>
</os>
- An <filesystem> element for specifying how the container's filesystem
is to be provided. This can actually be useful for full-machine virt
too such as KVM which have host filesystem pass-through. There are
various ways to configure it:
eg to use '/some/directory' as the root filesystem for a container
<filesystem type='mount'>
<source dir='/some/directory'/>
<target dir='/'/>
</filesystem>
eg to use a template called 'fedora9web' as the root filesystem for
a container
<filesystem type='template'>
<source name='fedora9web'/>
<target dir='/'/>
</filesystem>
eg to use a file containing a filesystem as the root filesystem
<filesystem type='file'>
<source file='/some/file.img'/>
<target dir='/'/>
</filesystem>
eg to use a disk partition or other block device (eg LVM) containing
a filesystem as the root filesystem
<filesystem type='block'>
<source dev='/dev/VolGroup00/Fedora9Web'/>
<target dir='/'/>
</filesystem>
If setting the root filesystem, the target path will be '/', some
container based virt allows the host OS root filesystem to be
used in the guest, and merely specify additive mounts at specific
locations,
eg to override just /home within a container
<filesystem type='mount'>
<source dir='/some/directory'/>
<target dir='/home'/>
</filesystem>
I believe this should satisfy all the OpenVZ, LXC and Linux-VServer
drivers' requirements around filesystems
Daniel
diff -r 5614da5fe9ef src/domain_conf.c
--- a/src/domain_conf.c Fri Jul 25 15:38:46 2008 +0100
+++ b/src/domain_conf.c Tue Jul 29 16:03:38 2008 +0100
@@ -86,6 +86,12 @@
"virtio",
"xen")
+VIR_ENUM_IMPL(virDomainFS, VIR_DOMAIN_FS_TYPE_LAST,
+ "mount",
+ "block",
+ "file",
+ "template")
+
VIR_ENUM_IMPL(virDomainNet, VIR_DOMAIN_NET_TYPE_LAST,
"user",
"ethernet",
@@ -234,6 +240,18 @@
VIR_FREE(def->driverType);
virDomainDiskDefFree(def->next);
+ VIR_FREE(def);
+}
+
+void virDomainFSDefFree(virDomainFSDefPtr def)
+{
+ if (!def)
+ return;
+
+ VIR_FREE(def->src);
+ VIR_FREE(def->dst);
+
+ virDomainFSDefFree(def->next);
VIR_FREE(def);
}
@@ -345,6 +363,7 @@
virDomainGraphicsDefFree(def->graphics);
virDomainInputDefFree(def->inputs);
virDomainDiskDefFree(def->disks);
+ virDomainFSDefFree(def->fss);
virDomainNetDefFree(def->nets);
virDomainChrDefFree(def->serials);
virDomainChrDefFree(def->parallels);
@@ -355,6 +374,7 @@
VIR_FREE(def->os.type);
VIR_FREE(def->os.arch);
VIR_FREE(def->os.machine);
+ VIR_FREE(def->os.init);
VIR_FREE(def->os.kernel);
VIR_FREE(def->os.initrd);
VIR_FREE(def->os.cmdline);
@@ -620,6 +640,89 @@
error:
virDomainDiskDefFree(def);
+ def = NULL;
+ goto cleanup;
+}
+
+
+/* Parse the XML definition for a disk
+ * @param node XML nodeset to parse for disk definition
+ */
+static virDomainFSDefPtr
+virDomainFSDefParseXML(virConnectPtr conn,
+ xmlNodePtr node) {
+ virDomainFSDefPtr def;
+ xmlNodePtr cur;
+ char *type = NULL;
+ char *source = NULL;
+ char *target = NULL;
+
+ if (VIR_ALLOC(def) < 0) {
+ virDomainReportError(conn, VIR_ERR_NO_MEMORY, NULL);
+ return NULL;
+ }
+
+ type = virXMLPropString(node, "type");
+ if (type) {
+ if ((def->type = virDomainFSTypeFromString(type)) < 0) {
+ virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR,
+ _("unknown filesystem type '%s'"), type);
+ goto error;
+ }
+ } else {
+ def->type = VIR_DOMAIN_FS_TYPE_MOUNT;
+ }
+
+ cur = node->children;
+ while (cur != NULL) {
+ if (cur->type == XML_ELEMENT_NODE) {
+ if ((source == NULL) &&
+ (xmlStrEqual(cur->name, BAD_CAST "source"))) {
+
+ if (def->type == VIR_DOMAIN_FS_TYPE_MOUNT)
+ source = virXMLPropString(cur, "dir");
+ else if (def->type == VIR_DOMAIN_FS_TYPE_FILE)
+ source = virXMLPropString(cur, "file");
+ else if (def->type == VIR_DOMAIN_FS_TYPE_BLOCK)
+ source = virXMLPropString(cur, "dev");
+ else if (def->type == VIR_DOMAIN_FS_TYPE_TEMPLATE)
+ source = virXMLPropString(cur, "name");
+ } else if ((target == NULL) &&
+ (xmlStrEqual(cur->name, BAD_CAST "target"))) {
+ target = virXMLPropString(cur, "dir");
+ } else if (xmlStrEqual(cur->name, BAD_CAST "readonly")) {
+ def->readonly = 1;
+ }
+ }
+ cur = cur->next;
+ }
+
+ if (source == NULL) {
+ virDomainReportError(conn, VIR_ERR_NO_SOURCE,
+ target ? "%s" : NULL, target);
+ goto error;
+ }
+
+ if (target == NULL) {
+ virDomainReportError(conn, VIR_ERR_NO_TARGET,
+ source ? "%s" : NULL, source);
+ goto error;
+ }
+
+ def->src = source;
+ source = NULL;
+ def->dst = target;
+ target = NULL;
+
+cleanup:
+ VIR_FREE(type);
+ VIR_FREE(target);
+ VIR_FREE(source);
+
+ return def;
+
+ error:
+ virDomainFSDefFree(def);
def = NULL;
goto cleanup;
}
@@ -1351,6 +1454,10 @@
dev->type = VIR_DOMAIN_DEVICE_DISK;
if (!(dev->data.disk = virDomainDiskDefParseXML(conn, node)))
goto error;
+ } else if (xmlStrEqual(node->name, BAD_CAST "filesystem")) {
+ dev->type = VIR_DOMAIN_DEVICE_FS;
+ if (!(dev->data.fs = virDomainFSDefParseXML(conn, node)))
+ goto error;
} else if (xmlStrEqual(node->name, BAD_CAST "interface")) {
dev->type = VIR_DOMAIN_DEVICE_NET;
if (!(dev->data.net = virDomainNetDefParseXML(conn, node)))
@@ -1560,7 +1667,21 @@
}
}
- if (!def->os.bootloader) {
+ /*
+ * Booting options for different OS types....
+ *
+ * - A bootloader (and optional kernel+initrd) (xen)
+ * - A kernel + initrd (xen)
+ * - A boot device (and optional kernel+initrd) (hvm)
+ * - An init script (exe)
+ */
+
+ if (STREQ(def->os.type, "exe")) {
+ def->os.init = virXPathString(conn, "string(./os/init[1])", ctxt);
+ }
+
+ if (STREQ(def->os.type, "xen") ||
+ STREQ(def->os.type, "hvm")) {
def->os.kernel = virXPathString(conn, "string(./os/kernel[1])", ctxt);
def->os.initrd = virXPathString(conn, "string(./os/initrd[1])", ctxt);
def->os.cmdline = virXPathString(conn, "string(./os/cmdline[1])", ctxt);
@@ -1610,12 +1731,9 @@
def->os.type,
def->os.arch,
type);
- if (!emulator) {
- virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR,
- "%s", _("unsupported guest type"));
- goto error;
- }
- if (!(def->emulator = strdup(emulator))) {
+
+ if (emulator &&
+ !(def->emulator = strdup(emulator))) {
virDomainReportError(conn, VIR_ERR_NO_MEMORY, NULL);
goto error;
}
@@ -1648,6 +1766,23 @@
ptr = ptr->next;
}
}
+ }
+ VIR_FREE(nodes);
+
+ /* analysis of the filesystems */
+ if ((n = virXPathNodeSet(conn, "./devices/filesystem", ctxt, &nodes)) < 0) {
+ virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR,
+ "%s", _("cannot extract filesystem devices"));
+ goto error;
+ }
+ for (i = n - 1 ; i >= 0 ; i--) {
+ virDomainFSDefPtr fs = virDomainFSDefParseXML(conn,
+ nodes[i]);
+ if (!fs)
+ goto error;
+
+ fs->next = def->fss;
+ def->fss = fs;
}
VIR_FREE(nodes);
@@ -2202,6 +2337,57 @@
}
static int
+virDomainFSDefFormat(virConnectPtr conn,
+ virBufferPtr buf,
+ virDomainFSDefPtr def)
+{
+ const char *type = virDomainFSTypeToString(def->type);
+
+ if (!type) {
+ virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR,
+ _("unexpected filesystem type %d"), def->type);
+ return -1;
+ }
+
+ virBufferVSprintf(buf,
+ " <filesystem type='%s'>\n",
+ type);
+
+ if (def->src) {
+ switch (def->type) {
+ case VIR_DOMAIN_FS_TYPE_MOUNT:
+ virBufferEscapeString(buf, " <source dir='%s'/>\n",
+ def->src);
+ break;
+
+ case VIR_DOMAIN_FS_TYPE_BLOCK:
+ virBufferEscapeString(buf, " <source dev='%s'/>\n",
+ def->src);
+ break;
+
+ case VIR_DOMAIN_FS_TYPE_FILE:
+ virBufferEscapeString(buf, " <source file='%s'/>\n",
+ def->src);
+ break;
+
+ case VIR_DOMAIN_FS_TYPE_TEMPLATE:
+ virBufferEscapeString(buf, " <source name='%s'/>\n",
+ def->src);
+ }
+ }
+
+ virBufferVSprintf(buf, " <target dir='%s'/>\n",
+ def->dst);
+
+ if (def->readonly)
+ virBufferAddLit(buf, " <readonly/>\n");
+
+ virBufferAddLit(buf, " </filesystem>\n");
+
+ return 0;
+}
+
+static int
virDomainNetDefFormat(virConnectPtr conn,
virBufferPtr buf,
virDomainNetDefPtr def)
@@ -2479,6 +2665,7 @@
unsigned char *uuid;
char uuidstr[VIR_UUID_STRING_BUFLEN];
virDomainDiskDefPtr disk;
+ virDomainFSDefPtr fs;
virDomainNetDefPtr net;
virDomainSoundDefPtr sound;
virDomainInputDefPtr input;
@@ -2548,6 +2735,9 @@
else
virBufferVSprintf(&buf, ">%s</type>\n", def->os.type);
+ if (def->os.init)
+ virBufferEscapeString(&buf, " <init>%s</init>\n",
+ def->os.init);
if (def->os.loader)
virBufferEscapeString(&buf, " <loader>%s</loader>\n",
def->os.loader);
@@ -2621,6 +2811,13 @@
if (virDomainDiskDefFormat(conn, &buf, disk) < 0)
goto cleanup;
disk = disk->next;
+ }
+
+ fs = def->fss;
+ while (fs) {
+ if (virDomainFSDefFormat(conn, &buf, fs) < 0)
+ goto cleanup;
+ fs = fs->next;
}
net = def->nets;
diff -r 5614da5fe9ef src/domain_conf.h
--- a/src/domain_conf.h Fri Jul 25 15:38:46 2008 +0100
+++ b/src/domain_conf.h Tue Jul 29 16:03:38 2008 +0100
@@ -91,6 +91,28 @@
unsigned int shared : 1;
virDomainDiskDefPtr next;
+};
+
+
+/* Two types of disk backends */
+enum virDomainFSType {
+ VIR_DOMAIN_FS_TYPE_MOUNT, /* Better named 'bind' */
+ VIR_DOMAIN_FS_TYPE_BLOCK,
+ VIR_DOMAIN_FS_TYPE_FILE,
+ VIR_DOMAIN_FS_TYPE_TEMPLATE,
+
+ VIR_DOMAIN_FS_TYPE_LAST
+};
+
+typedef struct _virDomainFSDef virDomainFSDef;
+typedef virDomainFSDef *virDomainFSDefPtr;
+struct _virDomainFSDef {
+ int type;
+ char *src;
+ char *dst;
+ unsigned int readonly : 1;
+
+ virDomainFSDefPtr next;
};
@@ -262,6 +284,7 @@
/* Flags for the 'type' field in next struct */
enum virDomainDeviceType {
VIR_DOMAIN_DEVICE_DISK,
+ VIR_DOMAIN_DEVICE_FS,
VIR_DOMAIN_DEVICE_NET,
VIR_DOMAIN_DEVICE_INPUT,
VIR_DOMAIN_DEVICE_SOUND,
@@ -273,6 +296,7 @@
int type;
union {
virDomainDiskDefPtr disk;
+ virDomainFSDefPtr fs;
virDomainNetDefPtr net;
virDomainInputDefPtr input;
virDomainSoundDefPtr sound;
@@ -318,6 +342,7 @@
char *machine;
int nBootDevs;
int bootDevs[VIR_DOMAIN_BOOT_LAST];
+ char *init;
char *kernel;
char *initrd;
char *cmdline;
@@ -357,6 +382,7 @@
virDomainGraphicsDefPtr graphics;
virDomainDiskDefPtr disks;
+ virDomainFSDefPtr fss;
virDomainNetDefPtr nets;
virDomainInputDefPtr inputs;
virDomainSoundDefPtr sounds;
@@ -411,6 +437,7 @@
void virDomainGraphicsDefFree(virDomainGraphicsDefPtr def);
void virDomainInputDefFree(virDomainInputDefPtr def);
void virDomainDiskDefFree(virDomainDiskDefPtr def);
+void virDomainFSDefFree(virDomainFSDefPtr def);
void virDomainNetDefFree(virDomainNetDefPtr def);
void virDomainChrDefFree(virDomainChrDefPtr def);
void virDomainSoundDefFree(virDomainSoundDefPtr def);
@@ -481,6 +508,7 @@
VIR_ENUM_DECL(virDomainDisk)
VIR_ENUM_DECL(virDomainDiskDevice)
VIR_ENUM_DECL(virDomainDiskBus)
+VIR_ENUM_DECL(virDomainFS)
VIR_ENUM_DECL(virDomainNet)
VIR_ENUM_DECL(virDomainChr)
VIR_ENUM_DECL(virDomainSoundModel)
--
|: 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 :|
15 years, 9 months
[libvirt] [PATCH]: Add carriage returns to qemudLog
by Chris Lalancette
Since qemudLog just maps to fprintf(stderr), add carriage returns every where it
is used, so it's easier on the eyes while debugging.
Signed-off-by: Chris Lalancette <clalance(a)redhat.com>
15 years, 9 months
[libvirt] [PATCH] Minor doc tweaks
by Charles Duffy
Per subject; clarifies the distinction between virDomainCreateLinux and
virDomainDefineXML+virDomainCreate, and adds documentation for the
autoport display attribute.
15 years, 9 months
