最後更新: 2023-11-13

目錄

• Download
• Installation
• Access VM
• 事前準備

介紹

• 它有 VGA 及 Serial port console
• Console 是沒有 login Password 的 (直入), 即使設定了 root pw
• Default 第一個 NIC (eth0) 會被綁到 br-lan
• HDD 及 NIC 都支持 virtio

Version

• openwrt-21.02    ->    Linux 5.4

 

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Download

 

# i.e. $VERSION=22.03.6

https://downloads.openwrt.org/$releases/VERSION/targets/x86/

x86 Targets

• "64" is for modern PC hardware
  (https://downloads.openwrt.org/releases/22.03.6/targets/x86/64/)
• "Generic" is for 32-bit-only hardware
  (https://downloads.openwrt.org/releases/22.03.6/targets/x86/generic/)

Disk images

• ext4-combined.img.gz

ext4 partition

 * allows to enlarge the partition

另外有 Package

ext4-combined-rootfs.img.gz           # Only rootfs (no generic-kernel.bin)

ext4-combined-efi.img.gz                # EFI boot

 

• squashfs-combined.img.gz (8.9M)

This disk image uses the traditional OpenWrt layout (squashfs(RO) + partition(RW))

 * only 230 MB of space to store additional packages

 * Failsafe Mode or Factory Reset

Partition layout

• /dev/sda1 is a 16MB ext4 /boot partition
• /dev/sda2 is a 256MB partition containing the squashfs root filesystem and a read-write f2fs filesystem
  (Any additional space in the device is unallocated.)

More Info.

blkid /dev/vda2

/dev/vda2: TYPE="squashfs" PARTUUID="c58d873d-02"

losetup

NAME       SIZELIMIT  OFFSET AUTOCLEAR RO BACK-FILE DIO LOG-SEC
/dev/loop0         0 4128768         1  0 /vda2       0     512

• rootfs.tar.gz

LXC 使用

 

Example

 

VERSION=22.03.6

IMG=openwrt-$VERSION-x86-generic-generic-ext4-combined.img.gz

URL=https://downloads.openwrt.org/releases/$VERSION/targets/x86/generic

wget $URL/$IMG

 

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Installation

 

 

準備 qcow2 format 的 image

gzip -dk openwrt-*.img.gz

qemu-img convert -f raw -O qcow2 openwrt-*.img openwrt.qcow2

建立 internal 的 bridge

# 方案 1 - By OS

/etc/network/interfaces

#### Bridge for Internal
auto openwrt_br0
iface openwrt_br0 inet manual
    bridge_stp off
    bridge_fd 0

ifup openwrt_sw

# 方案 2 - By virsh

openwrt-br0.xml

<network>
  <name>openwrt-br0</name>
  <bridge name='openwrt-br0' stp='off' delay='0'/>
</network>

virsh net-define openwrt-br0.xml

virsh net-start openwrt-br0

virsh net-autostart openwrt-br0

virsh net-list

 Name           State    Autostart   Persistent
-------------------------------------------------
 openwrt-br0    active   yes         yes

ip link show openwrt-br0

34: openwrt-br0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:9b:1b:b4 brd ff:ff:ff:ff:ff:ff

Notes: 當未有 VM 在此 bridge start 時它狀態是 DOWN 的

建立 VM

virsh define openwrt.xml

VM 的 XML

<domain type='kvm'>
  <name>openwrt</name>
  <memory unit='KiB'>128000</memory>
  <os>
    <type arch='x86_64'>hvm</type>
  </os>

  # Tuning
  <clock offset='localtime'>
    <timer name='hpet' present='no'/>
  </clock>
  <cpu mode='host-model' check='partial'>
    <feature policy='disable' name='svm'/>
  </cpu>

  # For "Power down" Not "System halted"
  <features>
    <acpi/>
  </features>

  # VM Device
  <devices>

    # Disk
    <emulator>/usr/bin/kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/mnt/raid/openwrt/openwrt.qcow2'/>
      <target dev='vda' bus='virtio'/>
    </disk>

    # NIC 1 - WAN
    <interface type='bridge'>
      <source bridge='vmbr1'/>
      <target dev='openwrt-wan'/>
      <model type='virtio'/>
    </interface>

    # NIC 2 - LAN
    <interface type='bridge'>
      <source bridge='openwrt-br0'/>
      <target dev='openwrt-lan'/>
      <model type='virtio'/>
    </interface>

    # Console
    <console type='pty'/>
    # VNC
    <graphics type='vnc' port='5910' autoport='no' listen='192.168.88.150'/>

  </devices>
</domain>

 

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Access VM

 

Serial port: 38400 8N1

 

 

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事前準備

 

1) Login in console

2) Stop DHCP

/etc/init.d/dnsmasq stop

3) 修改 NIC settings

/etc/config/network

config device
        option name 'br-lan'
        option type 'bridge'
        list ports 'eth1'

config interface 'lan'
        ...
        #option ip6assign '60'

config interface 'wan'
        option device  'eth0'
        #option proto  'dhcp'
        option proto   'static'
        option ipaddr  '192.168.11.15'
        option netmask '255.255.255.0'
        option gateway '192.168.11.1'
        option ipv6    '0'

/etc/init.d/network restart

eth0 係 LAN 的原因

uci show | grep ^network

...
network.@device[0]=device
network.@device[0].name='br-lan'
network.@device[0].type='bridge'
network.@device[0].ports='eth0'

4) 設定 web panel

/etc/config/uhttpd

# 只保留 https 的 8443

config uhttpd 'main'
        #list listen_http '0.0.0.0:80'
        list listen_https '0.0.0.0:8443'

/etc/init.d/uhttpd restart

5) 修改 firewall settings

/etc/config/firewall

config rule
        option name             Allow-FW-Panel
        option src              wan
        option dest_port        8443
        option proto            tcp
        option target           ACCEPT

6) Turning

(a) Disable IPv6

Network > Interfaces > Edit > Advanced Settins > "IPv6 assignment length" 選 "disabled"

7) Upgrade Panel

opkg update

# -V[<level>]             Set verbosity level to <level>

opkg -V upgrade luci

8) 安裝常用 Package

opkg install curl rsync tcpdump diffutils

 

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Other

 

• overlayfs