[pve-devel] [PATCH qemu-server 2/4] improve snapshot machine logic
Dominik Csapak
d.csapak at proxmox.com
Thu Sep 13 12:15:05 CEST 2018
instead of overwriting the 'machine' config in the snapshot,
use its own 'runningmachine' config only for the snapshot
this way, we do not lose the machine type if it was
explicitely set during the snapshot, but deleted afterwards
we also have to adapt the tests for this
Signed-off-by: Dominik Csapak <d.csapak at proxmox.com>
---
PVE/QemuConfig.pm | 26 +++++++++++++---------
PVE/QemuServer.pm | 9 +++++++-
test/snapshot-expected/create/qemu-server/102.conf | 2 +-
test/snapshot-expected/create/qemu-server/104.conf | 2 +-
test/snapshot-expected/create/qemu-server/106.conf | 2 +-
.../snapshot-expected/prepare/qemu-server/102.conf | 2 +-
.../snapshot-expected/prepare/qemu-server/104.conf | 2 +-
test/snapshot-test.pm | 2 +-
8 files changed, 30 insertions(+), 17 deletions(-)
diff --git a/PVE/QemuConfig.pm b/PVE/QemuConfig.pm
index 5cc2d48..35ed9b6 100644
--- a/PVE/QemuConfig.pm
+++ b/PVE/QemuConfig.pm
@@ -146,9 +146,7 @@ sub __snapshot_save_vmstate {
my $scfg = PVE::Storage::storage_config($storecfg, $target);
$name .= ".raw" if $scfg->{path}; # add filename extension for file base storage
$snap->{vmstate} = PVE::Storage::vdisk_alloc($storecfg, $target, $vmid, 'raw', $name, $size*1024);
- # always overwrite machine if we save vmstate. This makes sure we
- # can restore it later using correct machine type
- $snap->{machine} = PVE::QemuServer::get_current_qemu_machine($vmid);
+ $snap->{runningmachine} = PVE::QemuServer::get_current_qemu_machine($vmid);
}
sub __snapshot_check_running {
@@ -288,13 +286,21 @@ sub __snapshot_rollback_hook {
# we save the machine of the current config
$data->{oldmachine} = $conf->{machine};
} else {
- # Note: old code did not store 'machine', so we try to be smart
- # and guess the snapshot was generated with kvm 1.4 (pc-i440fx-1.4).
- $data->{forcemachine} = $conf->{machine} || 'pc-i440fx-1.4';
-
- # we remove the 'machine' configuration if not explicitly specified
- # in the original config.
- delete $conf->{machine} if $snap->{vmstate} && !defined($data->{oldmachine});
+ # if we have a 'runningmachine' entry in the snapshot
+ # we use that for the forcemachine parameter,
+ # else we use the old logic
+ if (defined($conf->{runningmachine})) {
+ $data->{forcemachine} = $conf->{runningmachine};
+ delete $conf->{runningmachine};
+ } else {
+ # Note: old code did not store 'machine', so we try to be smart
+ # and guess the snapshot was generated with kvm 1.4 (pc-i440fx-1.4).
+ $data->{forcemachine} = $conf->{machine} || 'pc-i440fx-1.4';
+
+ # we remove the 'machine' configuration if not explicitly specified
+ # in the original config.
+ delete $conf->{machine} if $snap->{vmstate} && !defined($data->{oldmachine});
+ }
}
return;
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 015f8f7..a3e602d 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -528,6 +528,13 @@ EODESCR
description => "Default storage for VM state volumes/files.",
optional => 1,
}),
+ runningmachine => {
+ description => "Specifies the Qemu machine type of the running vm. This is used internally for snapshots.",
+ type => 'string',
+ pattern => '(pc|pc(-i440fx)?-\d+\.\d+(\.pxe)?|q35|pc-q35-\d+\.\d+(\.pxe)?)',
+ maxLength => 40,
+ optional => 1,
+ },
machine => {
description => "Specific the Qemu machine type.",
type => 'string',
@@ -2255,7 +2262,7 @@ sub json_config_properties {
my $prop = shift;
foreach my $opt (keys %$confdesc) {
- next if $opt eq 'parent' || $opt eq 'snaptime' || $opt eq 'vmstate';
+ next if $opt eq 'parent' || $opt eq 'snaptime' || $opt eq 'vmstate' || $opt eq 'runningmachine';
$prop->{$opt} = $confdesc->{$opt};
}
diff --git a/test/snapshot-expected/create/qemu-server/102.conf b/test/snapshot-expected/create/qemu-server/102.conf
index c521154..9b57004 100644
--- a/test/snapshot-expected/create/qemu-server/102.conf
+++ b/test/snapshot-expected/create/qemu-server/102.conf
@@ -20,12 +20,12 @@ bootdisk: ide0
cores: 4
ide0: local:snapshotable-disk-1,discard=on,size=32G
ide2: none,media=cdrom
-machine: somemachine
memory: 8192
name: win
net0: e1000=12:34:56:78:90:12,bridge=somebr0,firewall=1
numa: 0
ostype: win7
+runningmachine: somemachine
smbios1: uuid=01234567-890a-bcde-f012-34567890abcd
snaptime: 1234567890
sockets: 1
diff --git a/test/snapshot-expected/create/qemu-server/104.conf b/test/snapshot-expected/create/qemu-server/104.conf
index ef7285e..54f1c21 100644
--- a/test/snapshot-expected/create/qemu-server/104.conf
+++ b/test/snapshot-expected/create/qemu-server/104.conf
@@ -39,13 +39,13 @@ bootdisk: ide0
cores: 4
ide0: local:snapshotable-disk-1,discard=on,size=32G
ide2: none,media=cdrom
-machine: somemachine
memory: 8192
name: win
net0: e1000=12:34:56:78:90:12,bridge=somebr0,firewall=1
numa: 0
ostype: win7
parent: test
+runningmachine: somemachine
smbios1: uuid=01234567-890a-bcde-f012-34567890abcd
snaptime: 1234567890
sockets: 1
diff --git a/test/snapshot-expected/create/qemu-server/106.conf b/test/snapshot-expected/create/qemu-server/106.conf
index c521154..9b57004 100644
--- a/test/snapshot-expected/create/qemu-server/106.conf
+++ b/test/snapshot-expected/create/qemu-server/106.conf
@@ -20,12 +20,12 @@ bootdisk: ide0
cores: 4
ide0: local:snapshotable-disk-1,discard=on,size=32G
ide2: none,media=cdrom
-machine: somemachine
memory: 8192
name: win
net0: e1000=12:34:56:78:90:12,bridge=somebr0,firewall=1
numa: 0
ostype: win7
+runningmachine: somemachine
smbios1: uuid=01234567-890a-bcde-f012-34567890abcd
snaptime: 1234567890
sockets: 1
diff --git a/test/snapshot-expected/prepare/qemu-server/102.conf b/test/snapshot-expected/prepare/qemu-server/102.conf
index 4ab1787..92db74a 100644
--- a/test/snapshot-expected/prepare/qemu-server/102.conf
+++ b/test/snapshot-expected/prepare/qemu-server/102.conf
@@ -18,12 +18,12 @@ bootdisk: ide0
cores: 4
ide0: somestore:somedisk,discard=on,size=32G
ide2: none,media=cdrom
-machine: somemachine
memory: 8192
name: win
net0: e1000=12:34:56:78:90:12,bridge=somebr0,firewall=1
numa: 0
ostype: win7
+runningmachine: somemachine
smbios1: uuid=01234567-890a-bcde-f012-34567890abcd
snapstate: prepare
snaptime: 1234567890
diff --git a/test/snapshot-expected/prepare/qemu-server/104.conf b/test/snapshot-expected/prepare/qemu-server/104.conf
index b62f2c6..02e2d3c 100644
--- a/test/snapshot-expected/prepare/qemu-server/104.conf
+++ b/test/snapshot-expected/prepare/qemu-server/104.conf
@@ -35,13 +35,13 @@ bootdisk: ide0
cores: 4
ide0: somestore:somedisk,discard=on,size=32G
ide2: none,media=cdrom
-machine: somemachine
memory: 8192
name: win
net0: e1000=12:34:56:78:90:12,bridge=somebr0,firewall=1
numa: 0
ostype: win7
parent: test
+runningmachine: somemachine
smbios1: uuid=01234567-890a-bcde-f012-34567890abcd
snapstate: prepare
snaptime: 1234567890
diff --git a/test/snapshot-test.pm b/test/snapshot-test.pm
index d95d77f..8988942 100644
--- a/test/snapshot-test.pm
+++ b/test/snapshot-test.pm
@@ -295,7 +295,7 @@ sub __snapshot_save_vmstate {
my $snap = $conf->{snapshots}->{$snapname};
$snap->{vmstate} = "somestorage:state-volume";
- $snap->{machine} = "somemachine";
+ $snap->{runningmachine} = "somemachine"
}
# END mocked PVE::QemuConfig methods
--
2.11.0
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