mirror of
https://github.com/kneutron/ansitest.git
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102 lines
3.5 KiB
Bash
102 lines
3.5 KiB
Bash
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#!/bin/bash
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# Try to fix vmbr0 / GUI access after a NIC name change
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# 2024.May kneutron
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cd /etc/network/
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cp -v interfaces interfaces.$(date +%Y%m%d@%H%M).bak
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cp -v interfaces interfaces.MODME
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for iface in $(find /sys/class/net/en*); do
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ifacemac=$(cat $iface/address)
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hascarrier=$(cat $iface/carrier)
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shortiface=${iface##*/} # bash inline sed - we only need the end, strip off all */
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# REF: https://tldp.org/LDP/abs/html/string-manipulation.html
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echo "$shortiface - MAC: $ifacemac - Has carrier signal: $hascarrier"
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done 2>/dev/null |column -t
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echo '====='
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echo "Here is the current entry for vmbr0:"
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grep -A 7 vmbr0 /etc/network/interfaces
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oldiface=$(grep -m 1 bridge-ports /etc/network/interfaces |awk '{print $2}')
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echo "This appears to be the OLD interface for vmbr0: $oldiface"
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echo "Please enter which new interface name to use for vmbr0:"
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read useinterface
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sed -i "s/bridge-ports $oldiface/bridge-ports $useinterface/" interfaces.MODME
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grep -m 1 bridge-ports interfaces.MODME
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ls -lh /etc/network/interfaces /etc/network/interfaces.MODME
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echo "The original interfaces file has been backed up!"
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ls -lh *bak
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echo "Hit ^C to backout, or Enter to replace interfaces file with the modified one and restart networking:"
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read
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cp -v interfaces.MODME interfaces
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systemctl restart networking
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ip a |grep vmbr0 |grep -v tap
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exit;
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Difficulty: getting this onto your proxmox server
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Solution: Copy script to USB disk or burn to ISO
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Dont forget to ' chmod +x ' it before running it as root
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===============
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Example output:
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# proxmox-fix-vmbr0-nic.sh
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'interfaces' -> 'interfaces.20240502@1211.bak'
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'interfaces' -> 'interfaces.MODME'
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eno1 - MAC: 20:7c:14:f2:ea:00 - Has carrier signal: 1
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eno2 - MAC: 20:7c:14:f2:ea:01 - Has carrier signal: 0
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eno3 - MAC: 20:7c:14:f2:ea:02 - Has carrier signal: 0
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eno4 - MAC: 20:7c:14:f2:ea:3a - Has carrier signal:
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enp4s0 - MAC: 20:7c:14:f2:ea:04 - Has carrier signal: 1
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enp5s0 - MAC: 20:7c:14:f2:ea:53 - Has carrier signal: 1
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enp6s0 - MAC: 20:7c:14:f2:ea:06 - Has carrier signal: 0
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enp7s0 - MAC: 20:7c:14:f2:ea:07 - Has carrier signal:
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enp8s0 - MAC: 20:7c:14:f2:ea:a8 - Has carrier signal:
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=====
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Here is the current entry for vmbr0:
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auto vmbr0
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iface vmbr0 inet static
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address 192.168.1.185/24
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gateway 192.168.1.1
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bridge-ports enp4s0
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bridge-stp off
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bridge-fd 0
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#bridgeto1gbit
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This appears to be the OLD interface for vmbr0: enp4s0
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Please enter which new interface name to use for vmbr0:
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eno1
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bridge-ports eno1
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-rw-r--r-- 1 root root 1.7K Apr 1 14:52 /etc/network/interfaces
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-rw-r--r-- 1 root root 1.7K May 2 12:12 /etc/network/interfaces.MODME
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The original interfaces file has been backed up!
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-rw-r--r-- 1 root root 1.7K May 2 12:04 interfaces.20240502@1204.bak
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-rw-r--r-- 1 root root 1.7K May 2 12:11 interfaces.20240502@1211.bak
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Hit ^C to backout, or Enter to replace interfaces file with the modified one and restart networking:
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^C
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[If you continue]
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'interfaces.MODME -> interfaces'
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3: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
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5: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
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inet 192.168.1.186/24 scope global vmbr0
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=====
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You should now be able to ping 192.168.1.186 and get to the Proxmox Web interface.
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NOTE - Script is a bit primitive, probably does not cover all network interface names, tested Ok in VM
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Feedback is welcome :)
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