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KVM 安装 Gentoo

环境准备

启动镜像

可以在Gentoo官网下载Minimal Installation CDhttps://www.gentoo.org/downloads/

虚拟磁盘

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mkdir -p /home/kvm/dev
qemu-img create -f qcow2 -o size=32G,preallocation=metadata /home/kvm/dev/dev.qcow2

用下载的LiveCD启动虚拟机

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virt-install 
--name dev
--ram 4096
--vcpus=2
--disk path=/home/kvm/dev/dev.qcow2,format=qcow2,size=32,bus=virtio
--cdrom /home/users/test/install-amd64-minimal-20200419T214502Z.iso
--network bridge=brlan
--noautoconsole
--graphics vnc,listen=0.0.0.0,port=5910,password=11223311

VNC连接

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配置IP, 可连接公网
配置root密码
开启sshd服务后改为ssh连接(方便)

安装

硬盘分区、格式化、挂载

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fdisk
mke2fs /dev/vda1 -t ext4 -L /
mount /dev/vda1 /mnt/gentoo/

DNS配置

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echo "nameserver 114.114.114.114" >> /etc/resolv.conf

stage3

官网下载https://www.gentoo.org/downloads/或把预下载好的scp到/mnt/gentoo目录

不要太旧, 否则后面portage更新后, 会被折磨死

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cd /mnt/gentoo
tar xpvf stage3-*.tar.xz --xattrs-include='*.*' --numeric-owner

建议portage更新源换为163或阿里

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mkdir /mnt/gentoo/etc/portage/repos.conf
cp /mnt/gentoo/usr/share/portage/config/repos.conf /mnt/gentoo/etc/portage/repos.conf/gentoo.conf

/mnt/gentoo/etc/portage/repos.conf

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[DEFAULT]
main-repo = gentoo

[gentoo]
location = /var/db/repos/gentoo
sync-type = websync
sync-uri = https://mirrors.163.com/gentoo-portage/
auto-sync = no

建议下载换为163或阿里

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mirrorselect -i -o >> /mnt/gentoo/etc/portage/make.conf

chroot

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cp /etc/resolv.conf /mnt/gentoo/etc/resolv.conf
mount --bind /sys /mnt/gentoo/sys
mount --bind /dev /mnt/gentoo/dev
mount -t proc proc /mnt/gentoo/proc
chroot /mnt/gentoo/ /bin/bash

export PS1="(chroot) ${PS1}"

更新portage

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emerge-webrsync

按需选择profile

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(chroot) livecd ~ # eselect profile list
Available profile symlink targets:
[1] default/linux/amd64/17.1 (stable) *
[2] default/linux/amd64/17.1/selinux (stable)
[3] default/linux/amd64/17.1/hardened (stable)
[4] default/linux/amd64/17.1/hardened/selinux (stable)
... ...

(chroot) livecd ~ # eselect profile set NUMBER

更新系统

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emerge --ask --verbose --update --deep --newuse @world

先安装vim, 方便编辑(非必须)

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emerge -av vim

设置时区(非必须)

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echo "Asia/Shanghai" > /etc/timezone
emerge --config sys-libs/timezone-data

配置内核

下载内核

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emerge --ask sys-kernel/gentoo-sources

安装pciutils(非必须)

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emerge --ask sys-apps/pciutils

按需配置、编译、安装

参考 https://wiki.gentoo.org/wiki/QEMU/Linux_guest

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cd /usr/src/linux
make defconfig
make kvm_guest.config
make -j`nproc` && make modules_install && make install

/etc/fstab配置

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LABEL=/                 /               ext4            noatime         0 1

网络配置

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emerge -av net-misc/netifrc

/etc/conf.d/net

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config_eth0="192.168.0.2 netmask 255.255.255.0 brd 192.168.0.255"
routes_eth0="default via 192.168.0.1"

eth0 开机启动

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ln -s /etc/init.d/net.lo /etc/init.d/net.eth0
rc-update add net.eth0 default

配置root密码

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passwd

sshd开机启动

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rc-update add sshd default

一些工具安装

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emerge -av sys-process/cronie
rc-update add cronie default

emerge -av app-admin/rsyslog
rc-update add rsyslog default

emerge -av sys-apps/mlocate

Grub2(bootloader)安装

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emerge -av sys-boot/grub:2
grub-install /dev/vda
grub-mkconfig -o /boot/grub/grub.cfg

测试

退出chroot, 重启测试

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virsh destroy|start dev2

排错

挂载Live CD启动

/etc/libvirt/qemu/dev2.xml

cdrom 指定iso

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<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/home/users/test/install-amd64-minimal-20200419T214502Z.iso'/>
<target dev='hdc' bus='ide'/>
<readonly/>
<address type='drive' controller='0' bus='1' unit='0'/>
</disk>

优先cdrom 启动

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<os>
<type arch='x86_64' machine='pc-q35-5.1'>hvm</type>
<boot dev='cdrom'/>
<boot dev='hd'/>
</os>

网卡命名不是eth0

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ln -s /dev/null 80-net-name-slot.rules
ln -s /dev/null 80-net-setup-link.rules
ln -s /dev/null 80-net-setup-slot.rules