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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-9598) wrong defaut gateway in guest VM with nics in isolated and a shared network
Date Thu, 24 Nov 2016 07:15:58 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15692439#comment-15692439
] 

ASF subversion and git services commented on CLOUDSTACK-9598:
-------------------------------------------------------------

Commit 90ae04b79177a43076270016303b62baf3e4aa4d in cloudstack's branch refs/heads/master from
[~rohit.yadav@shapeblue.com]
[ https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;h=90ae04b ]

Merge pull request #1766 from murali-reddy/vr-default-network-gateway

 CLOUDSTACK-9598: wrong defaut gateway for the nic in non-default network when guest VM has
nic's in more than one guest network set the tag for each host in /etc/dhcphosts.txt, and
use the tag to add exception in /etc/dhcpopts.txt to prevent sending default route, dns server
in case if the nic is in non-default network

this was the behaviour with edithosts.sh prior to 4.6

* pr/1766:
  CLOUDSTACK-9598: wrong defaut gateway for the nic in non-default network

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>


> wrong defaut gateway in guest VM with nics in isolated and a shared network
> ---------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-9598
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9598
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>    Affects Versions: 4.6.2, 4.7.1, 4.8.0, 4.9.0
>            Reporter: Murali Reddy
>             Fix For: 4.8.1, 4.10.0.0, 4.9.1.0
>
>
> When a guest instance is created with nic's in a isolated network and a shared network
(with just DHCP and DNS), with isolated network as default network, DHCP lease on shared network
from the shared network VR has wrong gateway. gateway is pointed to the virtual router IP.

> /etc/cloudstack/dhcpentry.json in shared network VR will have default gateway set to
0.0.0.0
> root@r-11-VM:~# cat /etc/cloudstack/dhcpentry.json
> {
>     "10.6.9.165": {
>         "default_entry": false,
>         "default_gateway": "0.0.0.0",
>         "dns_adresses": "10.1.1.1",
>         "host_name": "VM-fce34d73-dc99-4559-b077-64711509907a",
>         "ipv4_adress": "10.6.9.165",
>         "ipv6_duid": "00:03:00:01:06:5a:da:00:00:6a",
>         "mac_address": "06:5a:da:00:00:6a",
>         "type": "dhcpentry"
>     },
>     "id": "dhcpentry"
> DhcpCommand network element command sent from the management server is like below with
"defaultRouter":"0.0.0.0"
> 2016-11-15 19:15:29,319 DEBUG [c.c.a.t.Request] (Work-Job-Executor-25:ctx-a9aca0bb job-69/job-70
ctx-82c3fd7e) (logid:6ca37cdb) Seq 2-4650811040190170578: Sending  { Cmd , MgmtId: 7150818625286,
via: 2(trl-202-k-cs49-mreddy-kvm2), Ver: v1, Flags: 100011, [{"com.cloud.agent.api.routing.DhcpEntryCommand":{"vmMac":"06:5a:da:00:00:6a","vmIpAddress":"10.6.9.165","vmName":"VM-fce34d73-dc99-4559-b077-64711509907a","defaultRouter":"0.0.0.0","defaultDns":"10.1.1.1","duid":"00:03:00:01:06:5a:da:00:00:6a","isDefault":false,"executeInSequence":false,"accessDetails":{"zone.network.type":"Advanced","router.guest.ip":"10.6.9.164","router.ip":"169.254.2.18","router.name":"r-11-VM"},"wait":0}}]
}
> NIC details in the DB for the nic in the shared network has correct gateway.
> Gateway is set to 0.0.0.0, for every non-default nic [1]
> In case where shared network is non default network, then guest VM will end up treating
VR in the shared network as gateway instead of actual shared network gateway.
> [1] https://github.com/apache/cloudstack/blob/4.9/server/src/com/cloud/network/router/CommandSetupHelper.java#L224



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