From 241f2c89769a72a0e04540a0310af2817b60ae24 Mon Sep 17 00:00:00 2001 From: johannst Date: Wed, 24 Nov 2021 23:50:09 +0000 Subject: deploy: 4b2d24e60b147e5a7552e01ba800573164b2c441 --- tools/qemu.html | 33 ++++++++++++++++++++++++++++++--- 1 file changed, 30 insertions(+), 3 deletions(-) (limited to 'tools/qemu.html') diff --git a/tools/qemu.html b/tools/qemu.html index eb46b87..6a04769 100644 --- a/tools/qemu.html +++ b/tools/qemu.html @@ -298,12 +298,12 @@ connection.

VM snapshots

VM snapshots require that there is at least on qcow2 disk attached to the VM -([VM Snapshots][qemu-doc-snapshot]).

-

Commands for qemu [Monitor][qemu-doc-monitor] or [QMP][qemu-doc-qmp]:

+(VM Snapshots).

+

Commands for qemu Monitor or QMP:

# List available snapshots.
 info snapshots
 
-# Create/Load/Delete snapshot with name <tag>
+# Create/Load/Delete snapshot with name <tag>.
 savevm <tag>
 loadvm <tag>
 delvm <tag>
@@ -313,6 +313,33 @@ delvm <tag>
     -loadvm <tag>  \
     ...
+

VM Migration

+

Online migration example:

+
# Start machine 1 on host ABC.
+qemu-system-x86_64 -monitor stdio -cdrom <iso>
+
+# Prepare machine 2 on host DEF as migration target.
+# Listen for any connection on port 12345.
+qemu-system-x86_64 -monitor stdio -incoming tcp:0.0.0.0:12345
+
+# Start migration from the machine 1 monitor console.
+(qemu) migrate tcp:DEF:12345
+
+

Save to external file example:

+
```bash
+# Start machine 1.
+qemu-system-x86_64 -monitor stdio -cdrom <iso>
+
+# Save VM state to file.
+(qemu) migrate "exec:gzip -c > vm.gz"
+
+# Load VM from file.
+qemu-system-x86_64 -monitor stdio -incoming "exec: gzip -d -c vm.gz"
+
+
+

The migration source machine and the migration target machine should be +launched with the same parameters.

+

Appendix: Direct Kernel boot

Example command line to directly boot a Kernel with an initrd ramdisk.

qemu-system-x86_64                                                     \
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