two minutes on my laptop. Note that due to sparse allocation, raw
disks don't actually take up more space than qcow2 disks (and
they're temporary anyway).
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nfsd, as suggested by the nfs-utils README.
Also, rather than relying on Upstart events (which have all sorts of
problems, especially if you have jobs that have multiple
dependencies), we know just let jobs start their on prerequisites.
That is, nfsd starts mountd in its preStart script; mountd starts
statd; statd starts portmap. Likewise, mountall starts statd to
ensure that it can mount NFS filesystems. This means that doing
something like "start nfsd" from the command line will Do The Right
Thing and start the dependencies of nfsd.
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TCP port on the guest. Useful during testing (e.g. to access a web
server in the guest through a web browser on the host).
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This has the advantage that it doesn't depend on networking being
up.
* Move common QEMU/KVM guest configuration to profiles/qemu-guest.nix.
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so the startup synchronisation didn't work, causing spurious QEMU
failures ("Device 'vde' could not be initialized").
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together into virtual networks. This has several advantages:
- It's more secure because the QEMU instances use Unix domain
sockets to talk to the switch.
- It doesn't depend on the host's network interfaces. (Local
multicast fails if there is no default gateway, so for instance it
fails if a laptop is not connected to any network.)
- VDE devices can be connected together to form arbitrary network
topologies.
- VDE has a "wirefilter" tool to emulate delays and packet loss,
which are useful for network testing.
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interactively on a network specification. For instance:
$ nix-build tests/ -A quake3.driver
$ ./result/bin/nixos-test-driver
> startAll;
client1: starting vm
client1: QEMU running (pid 14971)
server: starting vm
server: QEMU running (pid 14982)
...
> $client1->execute("quake3 ...");
* Use the GNU readline library in interactive mode.
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guest connect to a Unix domain socket on the host rather than the
other way around. The former is a QEMU feature (guestfwd to a
socket) while the latter requires a patch (which we can now get rid
of).
svn path=/nixos/branches/boot-order/; revision=22331
machine can now declare an option `virtualisation.vlans' that causes
it to have network interfaces connected to each listed virtual
network. For instance,
virtualisation.vlans = [ 1 2 ];
causes the machine to have two interfaces (in addition to eth0, used
by the test driver to control the machine): eth1 connected to
network 1 with IP address 192.168.1.<i>, and eth2 connected to
network 2 with address 192.168.2.<i> (where <i> is the index of the
machine in the `nodes' attribute set). On the other hand,
virtualisation.vlans = [ 2 ];
causes the machine to only have an eth1 connected to network 2 with
address 192.168.2.<i>. So each virtual network <n> is assigned the
IP range 192.168.<n>.0/24.
Each virtual network is implemented using a separate multicast
address on the host, so guests really cannot talk to networks to
which they are not connected.
* Added a simple NAT test to demonstrate this.
* Added an option `virtualisation.qemu.options' to specify QEMU
command-line options. Used to factor out some commonality between
the test driver script and the interactive test script.
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console. This uses the `sendkey' command in the QEMU monitor.
* For the block/unblock primitives, use the `set_link' command in the
QEMU monitor.
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it special commands such as "screendump", "sendkey" and so on.
* Take screenshots using the "screendump" command. This has the
advantage over "scrot" that it also supports taking a picture of the
console, and is not affected by weird X visuals.
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its default behaviour is to stop the emulator (i.e. suspend the VM).
For automated tests, this is bad, because is makes the VM appear to
hang without any error message. The "werror=report" flag causes
QEMU to report the problem to the VM. As a side effect QEMU exits
very elegantly:
[ 2.308668] end_request: I/O error, dev vda, sector 534400
[ 2.309611] Buffer I/O error on device vda, logical block 66800
...
*** glibc detected *** /nix/store/yhngqrww53j0aw7z7v4bv948x5g5fc3d-qemu-kvm-0.12.1.2/bin/qemu-system-x86_64: double free or corruption (!prev): 0x08e3e040 ***
Aborted
So I guess we now depend on a bug in QEMU :-)
svn path=/nixos/trunk/; revision=19703
