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Posted to issues@cloudstack.apache.org by "Sanjeev N (JIRA)" <ji...@apache.org> on 2013/06/25 11:00:26 UTC

[jira] [Created] (CLOUDSTACK-3186) Duplicate entries in /etc/hosts file on VR after reboot

Sanjeev N created CLOUDSTACK-3186:
-------------------------------------

             Summary: Duplicate entries in /etc/hosts file on VR after reboot
                 Key: CLOUDSTACK-3186
                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-3186
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
          Components: Management Server
    Affects Versions: 4.2.0
         Environment: Latest build from master6-17-statble branch
            Reporter: Sanjeev N
             Fix For: 4.2.0


/etc/hosts file on VR contains the IP address to Host Name mappings.
In 4.2 we have introduced a new entry called "data-server" and mapped to Router VMs eth0 interface ip address. This is for the guest vms  to access user-data and ssh-keys from the Router VM. 
Please refer to bug https://issues.apache.org/jira/browse/CLOUDSTACK-2644 for more info.
Making this entry in the hosts file is part of cloud-early-config file and every time a router is rebooted new entry would be made to the hosts file.
If the router reboots multiple times for some reason, we see lot of duplicate entries in the hosts file.

Following is the contents from /etc/hosts file from VR which was rebooted for multiple times:
127.0.0.1       localhost

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
10.147.43.6 data-server
10.147.43.6 r-4-VM
10.147.43.6 data-server
10.147.43.6 r-4-VM
10.147.43.6 data-server
10.147.43.6 r-4-VM
10.147.43.5 s1
10.147.43.7 s1-passwd
10.147.43.10 addaf9b0-bdbc-4c4a-80ed-67664ad781e0
10.147.43.8 3b2804dd-225d-4cf3-bcdc-fed468c61192
10.147.43.130 s2
10.147.43.132 0e0df8e6-2c0f-455b-8571-b5f6a0dbd44e
10.147.43.133 s2-passwd
10.147.43.134 bf2e0e55-a2c9-4d26-a489-b8d8aa596350

It would be good to check for the entries present in the file before appending to it and avoid duplicate entries.


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