Differences

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--- chuleta_kvm [2020/06/04 10:35] – [Bridges en interfaces con vlan] etfiat
+++ chuleta_kvm [2023/03/17 17:00] (current) – [Modos de red] etfiat
@@ Line 1: / Line 1: @@
 ===== KVM =====
+==== Crear imagen ====
+<code>
+qemu-img create -f qcow2 image.img 10G
+</code>
+==== Get images info ====
+<code>
+qemu-img info /route/example.img
+</code>
+==== Convert image from qcow2 to raw ====
+<code>
+qemu-img convert -f qcow1 -O raw /var/lib/libvirt/images/kvm2.img /var/lib/libvirt/images/kvm2_new.img
+qemu-img convert -f vpc -O qcow2
+</code>
+==== Snapshots ====
+<code>
+qemu-img create -f qcow2 -F qcow2 -b win10.qcow2 win10_UOC_DB.img
+</code>
 === KVM con I/O iscsi paravirtualizado soporte trim optimizados ceros y teclado español===
@@ Line 38: / Line 55: @@
 ==== Ubuntu + KVM + VNC ====
   * El arranque correcto con vnc requiere quitar de la linea boot la opción "splash"
+==== KVM con BIOS uefi ====
+<code>
+kvm -bios /usr/share/ovmf/OVMF.fd -m 2G cosa.img
+</code>
+==== KVM con BIOS uefi nueva sintaxis ====
+<code>
+cp /usr/share/OVMF/OVMF_VARS.fd .
+kvm  -drive if=pflash,format=raw,readonly=on,file=/usr/share/ovmf/OVMF.fd \
+     -drive if=pflash,format=raw,file=OVMF_VARS.fd  # requiere copia editable de OVFM_VARS.fd
+</code>
 ==== Modos de red ====
-+ info http://www.linux-kvm.org/page/Networking
+  * + info http://www.linux-kvm.org/page/Networking
 === User Networking ===
+== Redirección de puertos ==
+<code>
+qemu-system-x86_64  -net nic,model=rtl8139 -net user,hostfwd=tcp::3389-:3389,hostfwd=tcp::1992-:1992
+</code>
 **Cuando usar:**
     * Un modo simple para que la máquina virtual tenga acceso al host, a internet y a recursos de la red local
@@ Line 152: / Line 190: @@
+==== Pasar dispositivo usb a la VM ====
+<code>
+sudo kvm -m 4000  -cdrom Descargas/Fedora-Games-Live-x86_64-33-1.2.iso -usb --device usb-host,vendorid=0x258a,productid=0x0027
+</code>
 ==== Bridges en interfaces con vlan ====
@@ Line 212: / Line 257: @@
 </code>
+==== Bridged network sintaxis nueva ====
+<code>
+qemu-system-x86_64 -enable-kvm                                                           \
+ -m 4096 frontal.img                                                                      \
+ -device e1000,netdev=net0,mac=DE:AD:BE:EF:00:FA                                         \
+ -netdev tap,id=net0,script=/etc/kvm/kvm-brblades-ifup,downscript=/etc/kvm/kvm-ifdown    \
+ -device e1000,netdev=net1,mac=DE:AD:BE:EF:00:FB                                         \
+ -netdev tap,id=net1,script=/etc/kvm/kvm-brceph-iup,downscript=/etc/kvm/kvm-ifdown       \
+$ cat /etc/kvm/kvm-brceph-ifup
+#!/bin/sh
+#
+# Script called by kvm on tap interface creation
+#
+KVM_BR=`basename $0 -ifup | sed -e 's/^[^-]*-\?//'`
+KVM_BRIDGE=${KVM_BR:-$KVM_BRIDGE}
+echo "$0:"
+echo "Adding $1 to bridge interface $KVM_BRIDGE"
+brctl addif "$KVM_BRIDGE" "$1"
+ip link set "$1" up
+$ cat /etc/kvm/kvm-ifdown
+#!/bin/sh
+#
+# Script called by kvm on tap interface deletion
+#
+KVM_BR=`basename $0 -ifdown|sed -e 's/^[^-]*-\?//'`
+KVM_BRIDGE=${KVM_BR:-$KVM_BRIDGE}
+echo "$0:"
+echo "Removing $1 from bridge $KVM_BRIDGE"
+ip link set "$1" down
+brctl delif "$KVM_BRIDGE" "$1"
+</code>