1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
Ideas for the Python bindings:
https://www.redhat.com/archives/fedora-virt/2009-April/msg00114.html
----------------------------------------------------------------------
We badly need to actually implement the FTP server mentioned in the
documentation.
Or: Implement a FUSE-based filesystem. See the FUSE mountlo
project which does something similar, albeit only to single
filesystems:
http://sourceforge.net/project/showfiles.php?group_id=121684&package_id=150116
----------------------------------------------------------------------
BufferIn and BufferOut should turn into <char *, int> and simple
strings in other languages that can handle 8 bit clean strings.
Limit on transfers would still be 2MB for these types.
- then implement write-file properly
- and implement read-file
----------------------------------------------------------------------
Implement febootstrap command.
----------------------------------------------------------------------
Complete the Haskell bindings (see discussion on haskell-cafe).
----------------------------------------------------------------------
Complete the bindings tests - must test the return values and
error cases.
----------------------------------------------------------------------
For virt-inspector:
- Make a libvirt XML config
- Test over available OSes
- Add 'reged' / NT registry support.
----------------------------------------------------------------------
Use virtio_blk by default. It's faster and more natural.
Unfortunately it seems like this will rename all devices - see next
item.
Note: virtio_blk *IS* supported by all our minimum platforms,
ie. CentOS 5.3, Fedora 11, Debian.
----------------------------------------------------------------------
Qemu options -- After discussion with the KVM developers, they have
recommended some flags which will improve the safety and reliability
of KVM. Need to test that these also work under qemu (or at least, do
no harm):
-no-hpet HPET support is broken and should be disabled.
-rtc-td-hack Keeps the rtc clock source track time correctly.
-drive file=...,if=[ide|virtio],cache=off
cache=off is necessary to improve reliability in the
event of a system crash when writing.
----------------------------------------------------------------------
"Standalone/local mode"
Instead of running guestfsd (the daemon) inside qemu, there should be
an option to just run guestfsd directly.
The architecture in this mode would look like:
+------------------+
| main program |
|------------------|
| libguestfs |
+--------^---------+
| | reply
cmd | |
+----v-------------+
| guestfsd |
+------------------+
Notes:
(1) This only makes sense if we are running as root.
(2) There is no console / kernel messages in this configuration, but
we might consider capturing stderr from the daemon.
(3) guestfs_config and guestfs_add_drive become no-ops.
Obviously in this configuration, commands are run directly on the
local machine's disks. You could just run the commands themselves
directly, but libguestfs provides a convenient API and language
bindings. Also deals with tricky stuff like parsing the output of the
LVM commands. Also we get to leverage other code such as
virt-inspector.
This is mainly useful from live CDs, ie. virt-p2v.
Should we bother having the daemon at all and just link the guestfsd
code directly into libguestfs?
----------------------------------------------------------------------
PPC problems:
ppc (32 bit) works with qemu from git, however there is no serial console
ppc64 requires extra parameters:
-M mac99 -cpu ppc64
however it still fails:
invalid/unsupported opcode: 01 - 01 - 1a (06301e83) 00000000018c2738 1
invalid bits: 00400000 for opcode: 0b - 19 - 15 (2d746572) 0000000000009230
no serial console in ppc or ppc64 because no one can tell us what
console=ttyXX option to use
----------------------------------------------------------------------
Supermin appliance should be moved into febootstrap.
|
