Openvz Container IP not working suddenly Solution

This may not apply to everyone but here is what happened to me.

One day my IP connectivity for one container went dead, I could ping the hostnode from it and the hostnode could ping it but there was no external routing.  I restarted the network service but it didn't help.

I checked the routing table inside the VPS and the host and everything looked normal.  I added another different IP on the same subnet to the container and it worked.  Right away I started thinking that that one IP was stolen by another user on the network or that it had been null routed.

Then I decided to do a traceroute to it, I found the last IP it hit was a different hostnode than my server was on.  Then I checked the route table on the other hostnode, sure enough it was routing for my containers IP even though it wasn't running there.

How did this happen?  Because I had a failed attempt at live-migrating this server days before,and when the othe hostnode was restarted it brought up the other copy of my failed migration and added my IP to the routing table, so the two nodes were fighting and advertising the route for my containers IP.

The solution was just a "route del xx.xx.xx.xx venet0" from the hostnode that wasn't running my container.


Tags:

openvz, container, ip, solutionthis, connectivity, ping, hostnode, external, routing, restarted, didn, vps, subnet, user, null, routed, traceroute, server, containers, wasn, migrating, othe, migration, nodes, advertising, quot, xx, venet,

Latest Articles

  • ImageMagick Convert PDF Not Authorized
  • ImageMagick Converted PDF to JPEG some files have a black background solution
  • Linux Mint Mate Customize the Lock screen messages and hide username and real name
  • Ubuntu/Gnome/Mint/Centos How To Take a partial screenshot
  • ssh how to verify your host key / avoid MIM attacks
  • Cisco IP Phone CP-8845 8800/8900 Series How To Reset To Factory Settings Instructions
  • ls how to list ONLY directories
  • How to encrypt your SSH private key file id_rsa
  • Linux Mint 18 Disable User Name List from showing on Login Screen
  • Firefox Cannot Hit Enter Key In Address Bar and Location History Not Working
  • Cisco Unified Communications Manager / CUCM IP 8.6,10,12 Install Error Solution
  • Ubuntu Debian Mint Linux SSHD OpenSSH Server Not Starting After Reboot Solution
  • nmap how to scan for all ports and not just the 1000 most common ports
  • Windows 7,8,10 and Server 2008, 2012, 2016, 2019 Read Only Attribute Won't Go Away
  • bind / named how to make a wildcard record and retain defined A records
  • Cisco Unified Communications Manager 12 Install Errors on Proxmox/KVM
  • Local Vs Universally Administered MAC Address NIC Refuses to come up
  • Cisco Unified Communications Manager 12 CUCM 12 - How To Enable Video Calling
  • Windows 7, 8, 10, Windows Server 2008, 2012, 2016, 2019 How To AC97 Audio Drivers and Other Unsigned Drivers
  • Cisco Unified Communications Manager / CUCM IP Telephony Definitions