【发布时间】：2020-05-02 13:13:40
【问题描述】：
我使用带有KVM 的 Terraform 创建了一个 CentOS 7 VM。作为测试服务器，这个虚拟机应该有一个静态 IP，应该可以使用Cloud-Init：
version: 2
ethernets:
eth0:
# match:
# name: eth0
dhcp4: false
dhcp6: false
addresses:
- 10.18.3.2/24
gateway4: 10.18.3.1
现在我们重新创建虚拟机并打开它的控制台：
terraform destroy -auto-approve
terraform apply -auto-approve
terraform console centos
这会从 Cloud-Init 产生以下输出
[ 10.073544] cloud-init[626]: Cloud-init v. 18.5 running 'init-local' at Wed, 15 Jan 2020 17:34:43 +0000. Up 10.04 seconds.
[ OK ] Started Initial cloud-init job (pre-networking).
[ OK ] Reached target Network (Pre).
Starting LSB: Bring up/down networking...
[FAILED] Failed to start LSB: Bring up/down networking.
See 'systemctl status network.service' for details.
Starting Initial cloud-init job (metadata service crawler)...
[ OK ] Reached target Network.
Starting Postfix Mail Transport Agent...
Starting Dynamic System Tuning Daemon...
[ OK ] Started Dynamic System Tuning Daemon.
[ 310.701064] cloud-init[820]: Cloud-init v. 18.5 running 'init' at Wed, 15 Jan 2020 17:39:44 +0000. Up 310.67 seconds.
[ 310.724568] cloud-init[820]: ci-info: +++++++++++++++++++++++++++++++++++Net device info+++++++++++++++++++++++++++++++++++
[ 310.727151] cloud-init[820]: ci-info: +--------+------+---------------------------+-----------+-------+-------------------+
[ 310.729810] cloud-init[820]: ci-info: | Device | Up | Address | Mask | Scope | Hw-Address |
[ 310.732602] cloud-init[820]: ci-info: +--------+------+---------------------------+-----------+-------+-------------------+
[ 310.735405] cloud-init[820]: ci-info: | eth0 | True | fe80::5054:ff:fe6a:ca6/64 | . | link | 52:54:00:6a:0c:a6 |
[ 310.738253] cloud-init[820]: ci-info: | lo | True | 127.0.0.1 | 255.0.0.0 | host | . |
[ 310.740787] cloud-init[820]: ci-info: | lo | True | ::1/128 | . | host | . |
[ 310.743060] cloud-init[820]: ci-info: +--------+------+---------------------------+-----------+-------+-------------------+
在 [FAILED] Failed to start LSB: Bring up/down networking 线上花了大约 5 分钟。正如我们所见，机器没有按照 Cloud-Init 的要求分配 ipc4 地址。
为什么我的静态 IP 地址没有分配？我也试过ens3作为接口名，没有成功。
Terraforms test.tf 文件
provider "libvirt" {
uri = "qemu:///system"
}
resource "libvirt_pool" "test_pool" {
name = "test_pool"
type = "dir"
path = "/tmp/kvm_test"
}
resource "libvirt_volume" "centos7-img" {
name = "centos7.qcow2"
pool = libvirt_pool.test_pool.name
source = "/var/lib/libvirt/images/CentOS-7-x86_64-GenericCloud.qcow2"
format = "qcow2"
}
data "template_file" "cloudinit_data" {
template = file("cloudinit.cfg")
}
data "template_file" "cloudinit_network" {
template = file("network.cfg")
}
resource "libvirt_cloudinit_disk" "cloudinit" {
name = "cloudinit.iso"
# https://github.com/hashicorp/terraform/issues/7919#issuecomment-320816276
user_data = data.template_file.cloudinit_data.rendered
network_config = data.template_file.cloudinit_network.rendered
pool = libvirt_pool.test_pool.name
}
resource "libvirt_network" "test_network" {
name = "test_network"
addresses = ["10.18.3.0/24"]
dhcp {
enabled = false
}
}
resource "libvirt_domain" "centos" {
name = "centos"
memory = "1024"
vcpu = 4
cloudinit = libvirt_cloudinit_disk.cloudinit.id
network_interface {
#network_name = "default"
network_id = libvirt_network.test_network.id
}
disk {
volume_id = libvirt_volume.centos7-img.id
}
console {
type = "pty"
target_type = "serial"
target_port = "0"
}
console {
type = "pty"
target_type = "virtio"
target_port = "1"
}
graphics {
type = "spice"
listen_type = "address"
autoport = true
}
}
cloudinit.cfg
#cloud-config
# https://cloudinit.readthedocs.io/en/latest/topics/modules.html
timezone: Europe/Berlin
fqdn: myhost.internal
manage_etc_hosts: true
resize_rootfs: true
ssh_authorized_keys:
- ssh-rsa mykey
ssh_pwauth: true
password: password
chpasswd:
list: |
root:password
centos:password
expire: false
# Here I set the yum proxy and update all packages
# runcmd:
# ...
网络服务日志
# systemctl status network.service -l
● network.service - LSB: Bring up/down networking
Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled)
Active: failed (Result: timeout) since Wed 2020-01-15 18:39:44 CET; 3min 11s ago
Docs: man:systemd-sysv-generator(8)
Process: 654 ExecStart=/etc/rc.d/init.d/network start (code=killed, signal=TERM)
CGroup: /system.slice/network.service
└─1000 /sbin/dhclient -q -lf /var/lib/dhclient/dhclient--eth0.lease -pf /var/run/dhclient-eth0.pid -H myhost eth0
Jan 15 18:40:50 myhost dhclient[1000]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6 (xid=0x60f0f449)
Jan 15 18:40:56 myhost dhclient[1000]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6 (xid=0x60f0f449)
Jan 15 18:41:02 myhost dhclient[1000]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11 (xid=0x60f0f449)
Jan 15 18:41:13 myhost dhclient[1000]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 20 (xid=0x60f0f449)
Jan 15 18:41:33 myhost dhclient[1000]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 20 (xid=0x60f0f449)
Jan 15 18:41:53 myhost dhclient[1000]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 17 (xid=0x60f0f449)
Jan 15 18:42:10 myhost dhclient[1000]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 17 (xid=0x60f0f449)
Jan 15 18:42:27 myhost dhclient[1000]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 13 (xid=0x60f0f449)
Jan 15 18:42:40 myhost dhclient[1000]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9 (xid=0x60f0f449)
Jan 15 18:42:49 myhost dhclient[1000]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 17 (xid=0x60f0f449)
解决方法：不要使用 Cloud-Init 进行网络配置
目前我发现的唯一解决方法是禁用 Cloud-Init 的网络部分，这意味着不渲染 network.cfg 文件。相反，在 network_interface 部分中设置静态 IP 有效：
resource "libvirt_domain" "centos" {
name = "centos"
memory = "1024"
vcpu = 4
cloudinit = libvirt_cloudinit_disk.cloudinit.id
network_interface {
network_id = libvirt_network.test_network.id
hostname = "centos"
addresses = ["10.18.3.2"]
}
# ...
}
【问题讨论】：
标签： networking centos terraform centos7 cloud-init