###### tags: `virtualization` `MAAS` `openstack` `Ubuntu` # cloud-init environment ## Prerequisites - 兩種使用 cloud-init 的方式(都只在 linux 上有效) - kvm or libvirt ( recommanded ) - acted like real machine - lxd - using lxd debuging is much faster - 可以擇一安裝 ## lxd install ```bash= sudo apt install snap sudo snap install lxd sudo lxd init --auto # please logout and login sudo usermod -aG lxd $USER # if id print you are in lxd group, you are success installed # otherwise just reboot it id $USER ``` ## install virtual machine manager ### CPU 硬體虛擬化 KVM 的執行必須仰賴 Intel VT 或 AMD-V 這兩種 CPU 硬體虛擬化功能，若在 Linux 中想要檢查自己的 CPU 是否有開啟這個功能，可以查看 /proc/cpuinfo 中是否有 vmx 或 svm 這兩個關鍵字 ``` grep -E '(vmx|svm)' /proc/cpuinfo ``` #### 利用 package 確認虛擬化狀態 - 安裝 cpu checker ``` sudo apt update sudo apt install cpu-checker ``` - check kvm status ``` sudo kvm-ok ``` 如果發現虛擬化那部份出問題，會 output 一些 error message ## install kvm at ubuntu ``` sudo apt install qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils virtinst virt-manager ``` - list of packages - qemu-kvm: kvm 提供硬體虛擬化的 hypervisor - libvirt-daemon-system: 提供設定 libvirt 的 daemon 程式 - libvirt-clients: 提供管理的 api - bridge-utils: a set of commandline to configure the ethernet network - virtinst: a set of commandline to configure the virtual machine - virt-manager: a easy-to-use GUI interface to configure the vitual machine ### check kvm is-active ``` sudo systemctl is-active libvirtd ``` if output active,then it is active. ### add user and group ``` sudo usermod -aG libvirt $USER sudo usermod -aG kvm $USER ``` log and login back, check the group has libvert and kvm. ``` id $USER ``` [more network setting](https://help.ubuntu.com/community/KVM/Networking#Bridged_Networking)