Ubuntu20.04 单节点 microstack 重设外网卡10.20.20.0/24

官方安装文档

Single node OpenStack on your workstation

我的环境

 虚拟机 2 CPU ， 16 G RAM
 网卡 eth0： 192.168.0.121
 网卡 eth1: 不设 IP
 Ubuntu 20.04
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安装

snap 安装

 sudo snap install microstack --beta
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或者

 sudo snap install microstack --devmode --beta
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可以 snap list 确认一下

初始化
```
 sudo microstack init --auto --control
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```
这一步会完成这些服务：
Glance (Image service),
Horizon (Dashboard),
Keystone (Security),
Neutron (Network)
Nova (Compute).

暂时不要执行 3. Launch an instance
执行也没有关系，后续操作会先删除
获取 dashboard 登录密码
```
 sudo snap get microstack config.credentials.keystone-password
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```
得到 admin 登录密码
sq2UB6aIXK28QJXBcz0azgnCFBy09Xa5

设置 CLI 命令别名
openstack 命令：

 sudo snap alias microstack.openstack openstack
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网络命令 ovs-vsctl：

 sudo snap alias microstack.ovs-vsctl ovs-vsctl
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获取外网物理设备名称（dashboard 设置 flat 外网时用）

 sudo ovs-vsctl get open . external_ids:ovn-bridge-mappings | awk -F: '{gsub("\"","");; print $1}'
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一般都是： physnet1

重设 br-ex

据说是 10.20.20.1 写死了，咱也找一下

root@ubuntu2004-121:/snap# cat ./microstack/245/bin/set-default-config.py
	
	./microstack/245/bin/set-default-config.py:        'config.network.ext-gateway': '10.20.20.1',
	./microstack/245/bin/set-default-config.py:        'config.network.control-ip': '10.20.20.1',
	./microstack/245/bin/set-default-config.py:        'config.network.compute-ip': '10.20.20.1',
	./microstack/245/bin/set-default-config.py:        'config.network.ext-cidr': '10.20.20.1/24',
	./microstack/245/lib/python3.8/site-packages/init/main.py:            'Falling back on 10.20.20.1')
	./microstack/245/lib/python3.8/site-packages/openstackclient/tests/unit/network/v2/test_subnet.py:                                 'nexthop': '10.20.20.1'},
	./microstack/245/lib/python3.8/site-packages/openstackclient/tests/unit/network/v2/test_subnet.py:                              'nexthop': '10.20.20.1'}],
	./microstack/245/lib/python3.8/site-packages/openstackclient/tests/unit/network/v2/test_subnet.py:                              'nexthop': '10.20.20.1'}],
	./microstack/245/lib/python3.8/site-packages/openstackclient/tests/unit/network/v2/test_subnet.py:                              'nexthop': '10.20.20.1'}],
	./microstack/245/lib/python3.8/site-packages/openstackclient/tests/unit/network/v2/test_subnet.py:                              'nexthop': '10.20.20.1'},
	./microstack/245/lib/python3.8/site-packages/openstackclient/tests/unit/network/v2/test_subnet.py:                "destination": "10.20.20.0/24", "nexthop": "10.20.20.1"}],
	./microstack/245/templates/05_snap_tweaks.j2:OPENSTACK_HOST = "10.20.20.1"
	./microstack/245/templates/05_snap_tweaks.j2:        'LOCATION': '10.20.20.1:11211',
	./microstack/245/usr/share/mysql/charsets/hp8.xml: 10 20 20 10 10 10 10 10 10 10 10 10 10 10 10 10

 root@ubuntu2004-121:/snap# cat ./microstack/245/bin/set-default-config.py
	 
	#!/usr/bin/env python3
	
	import os
	import socket
	
	from init import shell
	from init import credentials
	
	
	def _get_default_config():
	    snap_common = os.getenv('SNAP_COMMON')
	    return {
	        'config.is-clustered': False,
	
	        'config.cluster.tls-cert-path':
	        f'{snap_common}/etc/cluster/tls/cert.pem',
	        'config.cluster.tls-key-path':
	        f'{snap_common}/etc/cluster/tls/key.pem',
	
	        'config.cluster.fingerprint': 'null',
	        'config.cluster.hostname': 'null',
	        'config.cluster.credential-id': 'null',
	        'config.cluster.credential-secret': 'null',
	
	        'config.post-setup': True,
	        'config.keystone.region-name': 'microstack',
	        'config.credentials.key-pair': '/home/{USER}/snap/{SNAP_NAME}'
	                                       '/common/.ssh/id_microstack',
	        'config.network.node-fqdn': socket.getfqdn(),
	        'config.network.dns-servers': '1.1.1.1',
	        'config.network.dns-domain': 'microstack.example.',
	        'config.network.ext-gateway': '10.20.20.1',
	        'config.network.control-ip': '10.20.20.1',
	        'config.network.compute-ip': '10.20.20.1',
	        'config.network.ext-cidr': '10.20.20.1/24',
	
			......
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按照变通方式重设外网卡10.20.20.0/24 操作，删除前面安装时常见的 test 虚拟机、external 网卡和 test 网卡

eth0 连接到 br-ex

sudo ovs-vsctl add-port br-ex eth0
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这两步最好在一行命令完成

sudo ip addr flush dev eth0
sudo ip addr add 192.168.0.121/24 dev br-ex
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合并后：

sudo ip addr flush dev eth0 && sudo ip addr add 192.168.0.121/24 dev br-ex
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br-ex 已经存在并启动，这一步不需要

sudo ip link set br-ex up
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查看当前 IP
$ ip a

......
2: eth0:  mtu 1500 qdisc mq master ovs-system state UP group default qlen 1000
    link/ether 00:15:5d:5a:a6:60 brd ff:ff:ff:ff:ff:ff
3: eth1:  mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:15:5d:5a:a6:61 brd ff:ff:ff:ff:ff:ff
4: ovs-system:  mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether f6:77:a1:b8:f3:d9 brd ff:ff:ff:ff:ff:ff
5: br-ex:  mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether 00:15:5d:5a:a6:60 brd ff:ff:ff:ff:ff:ff
    inet 10.20.20.1/24 scope global br-ex
       valid_lft forever preferred_lft forever
    inet 192.168.0.121/24 scope global br-ex
       valid_lft forever preferred_lft forever
    inet6 fe80::ac6b:41ff:fe3e:964c/64 scope link 
       valid_lft forever preferred_lft forever
6: br-int:  mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether a2:81:9b:cb:7b:40 brd ff:ff:ff:ff:ff:ff
    ......
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现在 br-ex 链接了 2 个网卡
00:15:5d:5a:a6:60 对应刚刚增加的 eth0

dashboard 重新设置网卡和路由

创建外网

外网子网

IP分配范围
创建内网和路由
创建过程（略）

创建路由结果

测试一下
microstack 安装已经设置了 ICMP 和 SSH 安全策略，无需再设置
如果这个路由器 ping 不通，那就是外网不对，请重新尝试！

$ ping 192.168.0.25

PING 192.168.0.25 (192.168.0.25) 56(84) bytes of data.
64 bytes from 192.168.0.25: icmp_seq=1 ttl=254 time=1.01 ms
64 bytes from 192.168.0.25: icmp_seq=2 ttl=254 time=1.20 ms
......
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新建一个虚拟机

开始我这里一直报错，害得我重复好多次

Error: Failed to perform requested operation on instance "test-vm", the instance has an error status: Please try again later [Error: Build of instance 431c5dee-8f7c-48e0-81d0-e1c8d92ed76f aborted: Invalid input received: Invalid image identifier or unable to access requested image. (HTTP 400) (Request-ID: req-98871a6d-7795-4bfb-9828-a75cb130b8bc)]. 
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仔细阅读官方操作 Launch instances through the OpenStack dashboard

注意： Create New Volume - Choose No
在这里插入图片描述
其他步骤（略）

重启之后

按照变通方式重设外网卡10.20.20.0/24 中加入一个 service 的方法，经过几次测试，总是不成功！

按照他的文章建立 microstack-br-workaround 和 microstack-br-workaround.service 文件
抄录一下

编写服务脚本
$ cat /usr/local/bin/microstack-br-workaround

 #!/bin/bash
 #
 # Workaround to enable physical network access to MicroStack
 #
 # Adds the server physical ip address to br-ex.
 
 
 physicalcidr=192.168.0.121/24
 # gateway=192.168.1.1
 #
 # ovs-vsctl add-port br-ex eth0
 # ip addr flush dev eth0
 # ip address add $physicalcidr dev br-ex
 #
 # Add IP address to br-ex
 ip address add $physicalcidr dev br-ex || :
 ip link set br-ex up || :
 # ip route add default via $gateway dev br-ex || :
 #
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加入到 service

$ cd /etc/systemd/system
$ cat microstack-br-workaround.service

 [Unit]
 Description=Service for adding physical ip to microstack bridge
 Requires=snap.microstack.external-bridge.service
 After=snap.microstack.external-bridge.service
 
 [Service]
 ExecStart=/usr/local/bin/microstack-br-workaround
 SyslogIdentifier=microstack-br-workaround
 Restart=no
 WorkingDirectory=/usr/local/bin
 TimeoutStopSec=30
 Type=oneshot
 
 [Install]
 WantedBy=multi-user.target
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设置为 enable

systemctl daemon-reload
systemctl enable microstack-br-workaround.service

查看失败原因
$ sudo systemctl status microstack-br-workaround.service

 ● microstack-br-workaround.service - Service for adding physical ip to microstack bridge
      Loaded: loaded (/etc/systemd/system/microstack-br-workaround.service; enabled; vendor preset: enabled)
      Active: failed (Result: exit-code) since Sun 2022-10-23 15:09:00 CST; 55s ago
     Process: 2266 ExecStart=/usr/local/bin/microstack-br-workaround (code=exited, status=203/EXEC)
    Main PID: 2266 (code=exited, status=203/EXEC)
 
 Oct 23 15:09:00 ubuntu2004-121 systemd[1]: Starting Service for adding physical ip to microstack bridge...
 Oct 23 15:09:00 ubuntu2004-121 systemd[1]: microstack-br-workaround.service: Main process exited, code=exited, status=203/EXEC
 Oct 23 15:09:00 ubuntu2004-121 systemd[1]: microstack-br-workaround.service: Failed with result 'exit-code'.
 Oct 23 15:09:00 ubuntu2004-121 systemd[1]: Failed to start Service for adding physical ip to microstack bridge.
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暂时找不到好办法！

只好再次执行

sudo ip addr flush dev eth0 && sudo ip addr add 192.168.0.121/24 dev br-ex

测试一下
$ ping 192.168.0.25

 PING 192.168.0.25 (192.168.0.25) 56(84) bytes of data.
 64 bytes from 192.168.0.25: icmp_seq=1 ttl=254 time=5.29 ms
 64 bytes from 192.168.0.25: icmp_seq=2 ttl=254 time=0.989 ms
 ......
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后记

另外找一个单网卡的虚拟机进行测试
虽然 microstack-br-workaround 服务总是有错，但是，只是 ovs-vsctl del-port br-ex eth0 ，重启之后，还是可以继续

$ sudo vim /usr/local/bin/microstack-br-workaround

 #!/bin/bash
 #
 # Workaround to enable physical network access to MicroStack
 #
 # Adds the server physical ip address to br-ex.


 physicalcidr=192.168.0.128/24
 ovs-vsctl del-port br-ex eth0
 #
 # gateway=192.168.1.81
 #
 #  ovs-vsctl add-port br-ex eth0
 # ip addr flush dev eth0 || :
 # ip address add $physicalcidr dev br-ex || :
 # ip link set br-ex up || :
 # ip route add default via $gateway dev br-ex || :
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原文地址：https://blog.csdn.net/u010953609/article/details/127464014