[libvirt] Ability to nice KVM processes
Hey all,
I'd quite like the ability to nice my KVM process, on a home basis this
stops my Windows VM locking up my linux desktop when it's under load (or
at least limits it) and in a commercial setting it might be nice to
offer CPU priority to other customers or company backup-services over
customer VPS instances for example.
How does it sound? Any thoughts?
A quick chat in #virt revealed that a method for adding generic KVM
options has been under discussion for ages - I thought i'd throw my two
cents in, what about some sort of expression with variables like:
cmdstring{cmd} {options}/cmdstring (default)
for my nice proposition you could:
cmdstring/usr/bin/nice {cmd} {options}/cmdstring
Obviously people could use this to add conflicting options which is
concerning but perhaps that should be their own lookout - it seems to be
a fairly advanced request.
Thanks,
Henri
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Re: [libvirt] Ability to nice KVM processes
A good news - sorry I wasn't aware of the current stance on arbitrary
parameters and can say I completely agree with it.
Scheduler Parameters API sounds interesting - i'll see if I can find
time to look into it - if there's anyone who already knows how it works
that sees this as a quick patch though, massive points
Henri
Daniel P. Berrange wrote:
On Tue, Sep 09, 2008 at 10:23:59PM +0100, Henri Cook wrote:
Hey all,
I'd quite like the ability to nice my KVM process, on a home basis this
stops my Windows VM locking up my linux desktop when it's under load (or
at least limits it) and in a commercial setting it might be nice to
offer CPU priority to other customers or company backup-services over
customer VPS instances for example.
How does it sound? Any thoughts?
A quick chat in #virt revealed that a method for adding generic KVM
options has been under discussion for ages - I thought i'd throw my two
cents in, what about some sort of expression with variables like:
A method for adding arbitrary KVM options will never be merged in
libvirt
cmdstring{cmd} {options}/cmdstring (default)
for my nice proposition you could:
cmdstring/usr/bin/nice {cmd} {options}/cmdstring
The intent of libvirt is to provide APIs which can be used across all
hypervisors. Taking the 'nice' example, this is really a schedular
parameter. If we added ability to set 'nice -20' in the XML for KVM,
there is no way we could possibly implement this for Xen.
So the goal is to find a consistent API representation. Fortunately we
do already have a 'schedular parameters' API in libvirt - we simply
need to decide how to implement this for KVM - a 'nice' setting is
certainly one schedular tunable we'd likely want to support.
So if someone wants to implenment the schedular parameters driver API
for KVM patches welcomed...
Regards,
Daniel
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Re: [libvirt] How does virt-manager send shutdown?
Bryan Kearney wrote: How does virt-manager send shutdown to guests? Does it depend on if you are running kvm or xen? I have been building images with acpid enabled and acpi=force on the command line. After upgrading to f9 and running kvm my images no longer respond to shutdown. Is there a tweak which I have missed? - bk -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list Hi Bryan, What version of KVM does this now mean you are running? Rgds, Henri -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[libvirt] Web Interface - LibVirt Communication?
Hi, I want to write a web tool that lets me administer my cluster from one location (including operations that things like virt-manager don't provide) - what's the proper way of achieving this? Can i communicate over TCP with libvirt on each server (is this documented?) or should I be trying to get my web app to auth and run virsh commands over SSH? Thanks. Henri -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] Wiki Pages?
Brilliant, I really like the look of the site now! I look forward to contributing in the future Henri Daniel Veillard wrote: On Mon, Apr 07, 2008 at 04:03:25PM +0100, Henri Cook wrote: On a different tack - what about making some Wiki pages, or the pages on the main site wiki-integrated? I would love to add more info for KVM users to the XML format page, there were a lot of things i had to trial and error figure out myself when importing a) DomUs from a past Xen Install and b) DomUs from kvm command-line only setups As part of the Web site update/cleanup by Dan, there is now a wiki for libvirt, see http://wiki.libvirt.org/ it's linked from the main site. Tell us if there is any problem, thanks, Daniel -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] RFC: get/set properties
My first thought as a layman is that libvirt should only contain information related to the actual running of the virtual machine i.e. not things that might concern say, customer data (this may not be your use case). I would say that's up to the end user to manage with their own databases, cross referenced with a virtual machine name or similar unique identifier. I'd be interested to hear what those who've actually contributed to the project think though! :p Henri Ryan Scott wrote: I'd like to get some comments on the following... We would like to use libvirt to store some properties related to a domain. This can be done by adding a simple get/set API as follows: /* * Domain property get/set interfaces * * For GetProp, the return value must be freed by the caller. */ char * virDomainGetProp(virDomainPtr domain, const char *propName); int virDomainSetProp(virDomainPtr domain, const char *propName, const char *value); Sample command-line usage: virsh # setprop solaris-pv-0 foo bar virsh # setprop solaris-pv-0 blah 3 virsh # getprop solaris-pv-0 foo foo: bar The XML would look something like this: virsh # dumpxml solaris-pv-0 domain type='xen' id='-1' [ snip ] properties blah value=3/ foo value=bar/ /properties /domain Looking at the Xen code, I'll need to do a bit of work on that API before I can implement this. I don't know how well this will fit into the other hypervisors that Libvirt supports, so I'll leave those implementations up to someone else :) Any thoughts? -Ryan -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] modele1000/model - Specifying model in XML Configs
I've made a hack for this in the meantime that adds the model/model option to the interface section and allows me to pass in any string for addition - since I really wanted this functionality. Obviously this means i'm now compiling my Ubuntu package from source which isn't ideal, it'll probably get overwritten by apt at any moment :o Also, i got in a bit of a pickle last night which I had to reboot to fix: [EMAIL PROTECTED]:~# /usr/sbin/libvirtd -d libvir: QEMU error : cannot create bridge 'virbr0' : File exists Failed to autostart network 'default': cannot create bridge 'virbr0' : File exists Is there a way to fix this without rebooting? ifconfig virbr0 0.0.0.0 down brctl delbr virbr0 - doesn't seem to be enough, what did I miss? On the model options - an error message does seem like the best option: with model=foo in the -net options qemu: Unsupported NIC: foo I'd love to put all that in myself but my C-fu is seriously limited - I can only do simple work without more time to learn things properly, like adding things to the XML based on all the previous examples *g* Cheers, Henri Daniel Veillard wrote: On Tue, Apr 08, 2008 at 09:05:41AM +0100, Richard W.M. Jones wrote: On Mon, Apr 07, 2008 at 10:51:56PM +0100, Henri Cook wrote: I just tried to port a few customers over to this libvirt setup i'm hoping to run and I couldn't get their machines started because there's no mechanism to specify a model in the XML! I know redhat have changed KVM's default driver to e1000, which I think is the one I like the most and almost if not all of my VMs use. Ubuntu haven't done that yet however! Is there a model directive in the latest version? In the works? Just so I know which solution I should pursue (updating libvirt or harassing ubuntu to change the default) There isn't a way to select the model, but there ought to be. In KVM 64 the following NIC models are supported: i82551 i82557b i82559er ne2k_pci pcnet rtl8139 e1000 virtio Part of the problem with implementing this will be validating the model (unless we just pass the model string directly to qemu which could lead to errors). The documentation suggests running qemu with '-net nic,model=?' to list the models, and there is code in qemu/hw/pci.c to implement this, but it just doesn't work for me. Then what happen if you pass a wrong string ? Is there any way to get a meaningful error back from qemu and report it. Thet would IMHO be quite better than tracking the evolution of the emulation in QEmu, plus the added benefit of not being tied to a strict version of QEmu, Daniel -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] modele1000/model - Specifying model in XML Configs
There's nothing in brctl show for virbr0 - br0 still exists but that's in use (And shouldn't be causing the problem?) Maybe it's a one off - i'll try to recreate It could be a patch, maybe, I think bits of it are really bad C (i.e. hackery at its worst) - i'll make sure it works then see if i can merge it with source - unless someone who knows more and can do the error checking beats me too it, it's only about 6 lines Cheers, Henri Richard W.M. Jones wrote: On Tue, Apr 08, 2008 at 10:19:02AM +0100, Henri Cook wrote: I've made a hack for this in the meantime that adds the model/model You have a patch? Is there a way to fix this without rebooting? ifconfig virbr0 0.0.0.0 down brctl delbr virbr0 - doesn't seem to be enough, what did I miss? This should be enough to get rid of the bridge, but if not then you need to look at the error messages and the output of 'brctl show'. Rich. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] modele1000/model - Specifying model in XML Configs
Sorry - I tried to make a patch, but it appears it makes libvirtd
segfault (it starts but when i try to use virsh -c qemu:///system create
vm.cfg it segfaults).
Also - when building my own copy of libvirt - I can connect via virsh -c
qemu:///system, but just 'virsh' says it cannot connect to the
hypervisor - any idea what could cause that? I'm root at the time
As I said, my C-fu is weak - it's probably not useable, if anyone feels
really generous i'd appreciate some criticism, otherwise probably best
if one of you guys made it :p
I think for the meantime i'm going to hard code model=e1000 into my
build, since all my VMs will use that (no windows ones)
Henri
Richard W.M. Jones wrote:
On Tue, Apr 08, 2008 at 10:19:02AM +0100, Henri Cook wrote:
I've made a hack for this in the meantime that adds the model/model
You have a patch?
Is there a way to fix this without rebooting? ifconfig virbr0 0.0.0.0
down brctl delbr virbr0 - doesn't seem to be enough, what did I miss?
This should be enough to get rid of the bridge, but if not then you
need to look at the error messages and the output of 'brctl show'.
Rich.
--- libvirt-0.4.0/src/qemu_conf.h 2007-12-04 13:26:35.0 +
+++ libvirt-0.4.0-new/src/qemu_conf.h 2008-04-08 11:08:40.0 +0100
@@ -68,6 +68,7 @@
#define QEMUD_MAC_ADDRESS_LEN 6
#define QEMUD_OS_TYPE_MAX_LEN 10
+#define QEMUD_NET_DRIVER_MAX_LEN 10
#define QEMUD_OS_ARCH_MAX_LEN 10
#define QEMUD_OS_MACHINE_MAX_LEN 10
@@ -90,6 +91,8 @@
struct qemud_vm_net_def {
int type;
unsigned char mac[QEMUD_MAC_ADDRESS_LEN];
+unsigned char model[QEMUD_NET_DRIVER_MAX_LEN];
+
union {
struct {
char ifname[BR_IFNAME_MAXLEN];
--- libvirt-0.4.0/src/qemu_conf.c 2007-12-12 13:30:49.0 +
+++ libvirt-0.4.0-new/src/qemu_conf.c 2008-04-08 12:36:02.0 +0100
@@ -605,6 +605,7 @@
xmlChar *script = NULL;
xmlChar *address = NULL;
xmlChar *port = NULL;
+xmlChar *model = NULL;
net-type = QEMUD_NET_USER;
@@ -666,6 +667,8 @@
(net-type == QEMUD_NET_ETHERNET)
xmlStrEqual(cur-name, BAD_CAST script)) {
script = xmlGetProp(cur, BAD_CAST path);
+} else if (xmlStrEqual(cur-name, BAD_CAST model)) {
+ model = xmlGetProp(cur, BAD_CAST type);
}
}
cur = cur-next;
@@ -822,6 +825,17 @@
}
xmlFree(address);
}
+
+// Model can apply to all interface configurations, should we check for all the known supported model types?
+// Otherwise it's an optional parameter, so no real checking need be done
+if (model != NULL) {
+ int len = 0;
+ if ((len = xmlStrlen(model)) = QEMUD_NET_DRIVER_MAX_LEN) {
+ qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
+ _(Interface model type '%s' is too long), model);
+goto error;
+ }
+}
return 0;
@@ -838,6 +852,8 @@
xmlFree(script);
if (bridge)
xmlFree(bridge);
+if (model)
+ xmlFree(model);
return -1;
}
@@ -1679,13 +1695,27 @@
int vlan = 0;
while (net) {
char nic[100];
+char model[QEMUD_NET_DRIVER_MAX_LEN];
-if (snprintf(nic, sizeof(nic), nic,macaddr=%02x:%02x:%02x:%02x:%02x:%02x,vlan=%d,
+ // Model's optional, if it's not set simply set the temporary 'model' variable to ''
+ if (net-model == NULL)
+ {
+snprintf(model, sizeof(model), ,);
+ }
+ else
+ {
+snprintf(model, sizeof(model), ,model=%s,, net-model);
+ }
+
+if (snprintf(nic, sizeof(nic), nic%smacaddr=%02x:%02x:%02x:%02x:%02x:%02x,vlan=%d,
+ model,
net-mac[0], net-mac[1],
net-mac[2], net-mac[3],
net-mac[4], net-mac[5],
vlan) = sizeof(nic))
goto error;
+
+free(model);
if (!((*argv)[++n] = strdup(-net)))
goto no_memory;
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Re: [Libvir] [PATCH] Allow selection of the NIC model in QEMU/KVM
What about when the model name doesn't include an underscore? like e1000 H Richard W.M. Jones wrote: This patch allows selection of the NIC model for QEMU/KVM domains. The selection is done by adding a model/ element to the XML, as in this example: interface type='user' mac address='00:16:3e:33:b8:d3'/ model type='ne2k_pci'/ /interface The model type string is only checked to make sure it's a short alpha-numeric + underscore, since it seems impractical to extract the actual list of supported models. If you choose a supported model then QEMU starts up with this extra -nic parameter: /usr/bin/qemu-kvm -M pc -m 500 -smp 1 -monitor pty \ -boot c -hda /var/lib/xen/images/rhel51x32kvm.img \ -net nic,macaddr=00:16:3e:33:b8:d3,vlan=0,model=ne2k_pci -net user,vlan=0 \ -usb -vnc 127.0.0.1:0 If you choose a non-existant model then you get the error: libvir: QEMU error : internal error QEMU quit during monitor startup Rich. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] [PATCH] Allow selection of the NIC model in QEMU/KVM
I'm sorry , didn't read the patch properly first! Richard W.M. Jones wrote: This patch allows selection of the NIC model for QEMU/KVM domains. The selection is done by adding a model/ element to the XML, as in this example: interface type='user' mac address='00:16:3e:33:b8:d3'/ model type='ne2k_pci'/ /interface The model type string is only checked to make sure it's a short alpha-numeric + underscore, since it seems impractical to extract the actual list of supported models. If you choose a supported model then QEMU starts up with this extra -nic parameter: /usr/bin/qemu-kvm -M pc -m 500 -smp 1 -monitor pty \ -boot c -hda /var/lib/xen/images/rhel51x32kvm.img \ -net nic,macaddr=00:16:3e:33:b8:d3,vlan=0,model=ne2k_pci -net user,vlan=0 \ -usb -vnc 127.0.0.1:0 If you choose a non-existant model then you get the error: libvir: QEMU error : internal error QEMU quit during monitor startup Rich. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[Libvir] Zombie KVMs?
Hey all, Does anyone ever see: root 18628 3.2 0.0 0 0 ?Z17:30 0:40 \_ [kvm] defunct Zombie copies of KVM under libvirtd? They're unkillable (without restarting libvirtd) - although libvirt all still functions as normal Henri -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] Web Interface Question
This is why I asked the question! I've already started developing my own which is a pain, i've got it functional and doing reboots/startup/shutdown - i'm really annoyed i couldn't find oVirt when I was googling; Enomalism I found but for some reason discounted - i'll take another look at them both now but i'm not sure which route i'll take. Cheers for getting back to me, Henri Daniel Veillard wrote: On Sat, Apr 05, 2008 at 09:35:33PM +0100, Henri Cook wrote: Hey guys, I'm designing a web interface for libvirt so that my customers can manage their DomUs - unless you know of a good one that already exists??? I'm thinking that the best way to run this is have the web server connected to libvirtd - but I can't find any documentation about the API it presents - can you help? I considered giving the web server access to virsh and parsing that, but that has obvious security implications as it would need root/sudo access There is also Ovirt which is in development http://ovirt.org/ and enomalism http://www.enomalism.com/ I guess the problem is not to find a web interface for managing the domains, but to select the one with the features you need, or help finish one of the open source tools already around. Restarting from scratch at this point sounds a bit like wasted time, no ;-) ? Daniel -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] Web Interface Question
Thanks, I think the way forward for me is as follows: - I've had to discard oVirt and Enomalism, thanks for letting me know they exist on here/IRC. oVirt seems to be a complete solution that would require me to reconfigure many of my existing vms and Enomalism is just inappropriate for VPS hosts and more company-with-lots-of-machines centric it appears. - I'm really after something that can slot into my existing setup of '/home/virt/domains/Machine/vm.cfg' (a name I just chose arbitrarily) and use the cfg files to provide info about the machine to a user over the web, then the perl bindings to start/stop/restart. - So, the perl bindings and a socket with permissions for the web user or possibly a 'vmadmins' group - Eventually i hope to package it up into a standalone web server (a-la webmin) style solution and release it, but i've got to finish my degree first so that will be months, my customers are my immediate concern and I have a basic version of the above which can do shutdowns/reboots/startups in action at the moment. - It was regrettably necessary to have to have some actions contingent on things like libvirt error code: 42 i.e. If you try to retrieve a domain that doesn't exist (and is not defined). I expect these to break when the ubuntu package maintainers upgrade to 0.4.1 - but i'll have to deal with that when the time comes I'll keep hanging out in #virt for as long as i can remember to stay connected :p Thanks, Henri Richard W.M. Jones wrote: On Sat, Apr 05, 2008 at 09:35:33PM +0100, Henri Cook wrote: I'm designing a web interface for libvirt so that my customers can manage their DomUs - unless you know of a good one that already exists??? I'm thinking that the best way to run this is have the web server connected to libvirtd - but I can't find any documentation about the API it presents - can you help? I sort of gathered from IRC that you are using Perl Dan's Perl bindings. This is the right approach. In order to be able to contact libvirtd without needing to run anything as root you (may) need to change the permissions on the libvirtd socket (normally /var/run/libvirt/libvirt-sock). If your libvirt was configured to use PolicyKit you may also need to edit the configuration file /etc/PolicyKit/PolicyKit.conf to allow your web server user access to the privilege 'org.libvirt.unix.manage'. I would test this out using 'virsh -c ... list' as the web daemon user first of all. Rich. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[Libvir] Wiki Pages?
On a different tack - what about making some Wiki pages, or the pages on the main site wiki-integrated? I would love to add more info for KVM users to the XML format page, there were a lot of things i had to trial and error figure out myself when importing a) DomUs from a past Xen Install and b) DomUs from kvm command-line only setups P.S. Do we say DomU in the libvirt/KVM world? :-) Thanks, Henri Richard W.M. Jones wrote: On Mon, Apr 07, 2008 at 03:00:52PM +0100, Richard W.M. Jones wrote: $ ./test libvir: Domain error : invalid domain pointer in virDomainFree Stranger and stranger is that I cannot reproduce this with libvirt from CVS, only with libvirt 0.4.1 in Fedora 8. However there is no change in either src/hash.c or src/libvirt.c that I can point to which could have fixed this. So I don't know if this bug has really been fixed or is just in hiding (evidence suggests that the F8 problem is caused by memory corruption, so this is exactly the sort of bug which might just disappear by a simple recompilation). Valgrind doesn't see anything. Rich. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] Web Interface Question
Yes, the perl bindings with 0.4.0 at least often error - e.g. how do I check whether a domain is online? I could list all the domains or I could simply try and retrieve the domain by name, if error 42 (the 'unknown' error) comes back then the domain is not online. Maybe i'm using the perl bindings wrong? H Richard W.M. Jones wrote: On Mon, Apr 07, 2008 at 04:01:12PM +0100, Henri Cook wrote: - It was regrettably necessary to have to have some actions contingent on things like libvirt error code: 42 i.e. If you try to retrieve a domain that doesn't exist (and is not defined). I expect these to break when the ubuntu package maintainers upgrade to 0.4.1 - but i'll have to deal with that when the time comes I don't understand this -- do you mean you had to hard-code libvirt error numbers into your program? Rich. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] Wiki Pages?
It sounds great, but is indeed a lot of maintenance. I'd like the chance to expand the xml section more for KVM users though! Perhaps just a definitive run down of all the possible XML options in a generic context. The rest of the project's obviously open source - is the website under a source tree? Can I come on board as a contributor in some sense and propose 'patches' for the site? Henri Richard W.M. Jones wrote: On Mon, Apr 07, 2008 at 11:47:37AM -0400, Daniel Veillard wrote: My previous experience hosting a Wiki on xmlsoft.org (a.k.a. libvirt.org) has been rather painful, admitedly that was a few years ago ... I'm not sure what's the best way, hosting yet another wiki or reusing an existing one. Wikis, as you point out, require active management. I'm running several low-traffic OCaml wikis (might as well advertise them: http://ocaml-tutorial.org/ and http://cocan.org/) with reasonable success. We require authenticated email addresses for all editing, a diff of all edits are CC'd daily to subscribers, and we have people who act as editors for particular pages / sections of the wiki. This has controlled spam reasonably successfully. One Ubuntu developer who shall remain nameless turned out to have a sideline in blackhat SEO (wiki spamming) and actually signed up with his valid email address to spam the wiki. This was spotted almost instantly and he was kicked off. We had another case where someone signed up using http://mailinator.com and set up a http://bugmenot.com account which we also found quickly and eliminated. The daily emailed diffs of the whole wiki, plus the ability to roll back a day, basically make any long-term wiki spam impossible to carry out (or so we think ...[1]) The benefits of all this management can be useful, user-driven resources, and _if_ carefully structured and edited, this can be better than Google + mailing lists or asking the same questions over and over on IRC. Just my 2p (about $1). Rich. [1] And if you think of a way, rather than making lots of work for our editors by proving it, just email me OK? -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] Web Interface Question
I'd be very interested in the output, I really enjoy learning languages by-project although in my case the result isn't often the best way of doing things :p Maybe it's the way I learn!! The bonus of python presumably is that you can use the api straight from a python website, at the moment i'm using PHP (which i know extremely well and can whack up a website in in no time) to exec() perl scripts which do the administrative tasks for me. There's certainly an open source project in here somewhere, something where sysadmins can slot in a solution with their existing setup without having to do enormous amounts of reconfiguration - in an operating system independent manner (even the webserver could be packaged, like webmin or cpanel)). Glad to hear i'm not the only one out there, let me know if I can help at all. Henri Spencer Parker wrote: I am actually in the process of trying to develop one of these in Python. Since I am pretty new to python or programming in general, it has been a really good learning experience. I haven't really gotten very far yet...since its all learning about basically everything...its been fun. I have made some basic calls to the API and had the info shoved into a MySQL database...but thats about...nothing grand. On Mon, Apr 7, 2008 at 12:44 PM, Daniel P. Berrange [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: On Mon, Apr 07, 2008 at 02:38:17PM +0100, Richard W.M. Jones wrote: On Sat, Apr 05, 2008 at 09:35:33PM +0100, Henri Cook wrote: I'm designing a web interface for libvirt so that my customers can manage their DomUs - unless you know of a good one that already exists??? I'm thinking that the best way to run this is have the web server connected to libvirtd - but I can't find any documentation about the API it presents - can you help? I sort of gathered from IRC that you are using Perl Dan's Perl bindings. This is the right approach. In order to be able to contact libvirtd without needing to run anything as root you (may) need to change the permissions on the libvirtd socket (normally /var/run/libvirt/libvirt-sock). If your libvirt was configured to use PolicyKit you may also need to edit the configuration file /etc/PolicyKit/PolicyKit.conf to allow your web server user access to the privilege 'org.libvirt.unix.manage'. PolicyKit is one option - you'd need to edit /etc/PolicyKit/PolicyKit.conf to add an explicit rule allowing the httpd user access. Alternatively you could switch the UNIX socket to use SASL as its auth method, and setup a SASL username password There's some docs here http://libvirt.org/auth.html Dan. -- |: Red Hat, Engineering, Boston -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/ http://search.cpan.org/%7Edanberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :| -- Libvir-list mailing list Libvir-list@redhat.com mailto:Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list -- Spencer Parker ___ if you can't go to heaven, may you at least die in Ireland. ___ -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] Wiki Pages?
I'd happily host wiki.libvirt.org or similar for free, it's a bit of a conversion effort to move the entire site as it exists into a wiki structure - so maybe it would be progressive i.e. new documentation goes into the wiki It would be a lot of admin i'm sure, keeping rubbish posts out - it would take time to configure, time which I don't unfortunately have at the moment although will hopefully have in a couple of months. If someone wants to take it on and finds RHEL4 too restrictive as described, I can provide a php5/mysql5 web enabled shell for freebies (perhaps an acknowledgement) Henri Daniel Veillard wrote: On Mon, Apr 07, 2008 at 05:38:48PM +0100, Richard W.M. Jones wrote: On Mon, Apr 07, 2008 at 11:47:37AM -0400, Daniel Veillard wrote: My previous experience hosting a Wiki on xmlsoft.org (a.k.a. libvirt.org) has been rather painful, admitedly that was a few years ago ... I'm not sure what's the best way, hosting yet another wiki or reusing an existing one. Wikis, as you point out, require active management. I'm running several low-traffic OCaml wikis (might as well advertise them: http://ocaml-tutorial.org/ and http://cocan.org/) with reasonable success. We require authenticated email addresses for all editing, a diff of all edits are CC'd daily to subscribers, and we have people who act as editors for particular pages / sections of the wiki. This has controlled spam reasonably successfully. One Ubuntu developer who shall remain nameless turned out to have a sideline in blackhat SEO (wiki spamming) and actually signed up with his valid email address to spam the wiki. This was spotted almost instantly and he was kicked off. We had another case where someone signed up using http://mailinator.com and set up a http://bugmenot.com account which we also found quickly and eliminated. The daily emailed diffs of the whole wiki, plus the ability to roll back a day, basically make any long-term wiki spam impossible to carry out (or so we think ...[1]) The benefits of all this management can be useful, user-driven resources, and _if_ carefully structured and edited, this can be better than Google + mailing lists or asking the same questions over and over on IRC. Well if you have maintainance experience, why not ... except libvirt.org is a RHEL-4 box, i.e. not the easiest for bleeding edge stuff. if you feel this is reasonnable, and won't waste too much time, I agree this can be really useful too, I'm fine with the idea. Daniel -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[Libvir] modele1000/model - Specifying model in XML Configs
Hi guys, I just tried to port a few customers over to this libvirt setup i'm hoping to run and I couldn't get their machines started because there's no mechanism to specify a model in the XML! I know redhat have changed KVM's default driver to e1000, which I think is the one I like the most and almost if not all of my VMs use. Ubuntu haven't done that yet however! Is there a model directive in the latest version? In the works? Just so I know which solution I should pursue (updating libvirt or harassing ubuntu to change the default) Thanks, Henri -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] modele1000/model - Specifying model in XML Configs
P.S. I'd take even a hack to get this working in the meantime Henri Cook wrote: Hi guys, I just tried to port a few customers over to this libvirt setup i'm hoping to run and I couldn't get their machines started because there's no mechanism to specify a model in the XML! I know redhat have changed KVM's default driver to e1000, which I think is the one I like the most and almost if not all of my VMs use. Ubuntu haven't done that yet however! Is there a model directive in the latest version? In the works? Just so I know which solution I should pursue (updating libvirt or harassing ubuntu to change the default) Thanks, Henri -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [Libvir] Web Interface Question
That sounds quite exciting; is it open source? I'm looking at build something that works with KVM/Xen but i'm sure many of the operations are the same; especially for status type, read only queries. Do you know if there's anything like an RFC document for libvirtd? What did you base all your queries off while making the product? Thanks for getting back to me, Henri Shuveb Hussain wrote: Hello Henri, On Sun, Apr 6, 2008 at 2:05 AM, Henri Cook [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Hey guys, I'm designing a web interface for libvirt so that my customers can manage their DomUs - unless you know of a good one that already exists??? We, from BinaryKarma are the folks who contributed OpenVZ support for Libvirt and are experts in the area. We already have a product FluidVM that manages Xen and OpenVZ based virtual machines with support for Linux Containers and VMWare ESX coming up. FluidVM also ships with a browser based interface. Currently, there is also VPSCart, a free application built on top of the FluidVM platform available where you can create plans and expose them on a portal. customers can then choose and buy any of them. Users with the right privileges are automatically provisioned. They can login and manage their VPSs. Usage of VPSCart is completely optional. FluidVM ships with support for Local and SAN storage as well. You can evaluate a fully capable copy of FluidVM for a period of 45 days by downloading it from our web site. Here are the details: *FluidVM Screenshots:* http://www.binarykarma.com/fluidvm_screenshots.php *FluidVM Demo Videos:* http://www.binarykarma.com/demo.php *FluidVM Manuals, free License and User Manuals:* http://www.binarykarma.com/download.php If you have any further questions, we'll be happy to clarify them. Thanks regards, -- Shuveb Hussain B I N A R Y K A R M A Chennai, India. Phone : +91 44-64621656 Mobile: +91 98403-80386 http://www.binarykarma.com -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
