Cloud Init

• cloud-init.io / cloud-init
  • Apply user data to your instances automatically
  • Document
  • GitHub mirror cloud-init/cloud-init
• AlpineLinux
  • cloud-init
  • testing/cloud-init/APKBUILD
• Ubuntu
  • CloudInit
• ArchLinux
  • Cloud-init
• 特性
  • 配置自定义 locale
  • 配置 hostname
  • 生成 SSH 密钥
  • 配置临时挂载点
• 支持
  • terraform-provider-libvirt libvirt_cloudinit_disk
  • Ansible cloud_init_data_facts_module
    • 获取 cloud init 配置信息
• /var/log/cloud-init.log

# < 3.13
# ifupdown-ng
apk add ifupdown-ng iproute2-minimal
apk add cloud-init

cloud-init status --wait

# 阿里云
curl http://100.100.100.200/

# Linode / Akamai
# fd00:a9fe:a9fe::1
curl 169.254.169.254

# GCE
curl http://meta-data.google.internal/computeMetadata/v1/

• cloud init to install docker on ubuntu

user-data

#cloud-config
password: password
chpasswd:
  expire: False

meta-data

instance-id: someid/somehostname

• Instance Metadata Service (IMDS)
• /
  • meta-data
  • user-data
  • vendor-data
• qemu -smbios type=1,serial=ds='nocloud;s=http://10.0.2.2:8000/'
• nocloud
  • cloudinit.readthedocs.io/en/latest/reference/datasources/nocloud.html