本文介绍使用 libguestfs-tools 修改镜像文件密码的方法。
步骤
# 环境
# CentOS Linux release 7.9.2009 (AltArch)
# 鲲鹏 ARM 服务器
第一步：检查并修改qemu访问虚拟机镜像的权限
修改 qemu 配置文件 /etc/libvirt/qemu.conf，将 user = "root" 和 group = "root" 注释取消，并重启 libvirtd 或重启宿主机。
$ vim /etc/libvirt/qemu.conf
- #user = "root"
- #group = "root"
+ user = "root"
+ group = "root"
systemctl restart libvirtd
第二步：安装工具
# 安装libguestfs-tools
$ yum install libguestfs-tools
$ systemctl start libvirtd
第三步：修改密码
# 以下两组命令貌似均可，但是实测我的环境仅第二个命令可用
$ virt-customize -a CentOS-7-x86_64-GenericCloud.qcow2 --root-password password:xxx
$ virt-sysprep --root-password password:123456 -a *.qcow2
# 若以下错误
# cannot access storage file (as uid:107, gid:107)permission denied
# 说明您第一步没有做，给一下权限再尝试
# 示例
[root@compute-arm-01 stl]$ virt-sysprep --root-password password:123456 -a bionic-server-cloudimg-arm64.img
[ 0.0] Examining the guest ...
[ 5.4] Performing "abrt-data" ...
[ 5.4] Performing "backup-files" ...
[ 5.8] Performing "bash-history" ...
[ 5.9] Performing "blkid-tab" ...
[ 5.9] Performing "crash-data" ...
[ 6.0] Performing "cron-spool" ...
[ 6.0] Performing "dhcp-client-state" ...
[ 6.0] Performing "dhcp-server-state" ...
[ 6.0] Performing "dovecot-data" ...
[ 6.0] Performing "logfiles" ...
[ 6.1] Performing "machine-id" ...
[ 6.2] Performing "mail-spool" ...
[ 6.2] Performing "net-hostname" ...
[ 6.2] Performing "net-hwaddr" ...
[ 6.3] Performing "pacct-log" ...
[ 6.4] Performing "package-manager-cache" ...
[ 6.5] Performing "pam-data" ...
[ 6.5] Performing "passwd-backups" ...
[ 6.5] Performing "puppet-data-log" ...
[ 6.6] Performing "rh-subscription-manager" ...
[ 6.6] Performing "rhn-systemid" ...
[ 6.7] Performing "rpm-db" ...
[ 6.8] Performing "samba-db-log" ...
[ 6.8] Performing "script" ...
[ 6.8] Performing "smolt-uuid" ...
[ 6.9] Performing "ssh-hostkeys" ...
[ 6.9] Performing "ssh-userdir" ...
[ 6.9] Performing "sssd-db-log" ...
[ 7.0] Performing "tmp-files" ...
[ 7.0] Performing "udev-persistent-net" ...
[ 7.1] Performing "utmp" ...
[ 7.1] Performing "yum-uuid" ...
[ 7.1] Performing "customize" ...
[ 7.2] Setting a random seed
virt-sysprep: warning: random seed could not be set for this type of guest
[ 7.3] Setting the machine ID in /etc/machine-id
[ 7.3] Setting passwords
[ 8.7] Performing "lvm-uuids" ...