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Date: Fri, 22 Mar 2013 10:53:17 +0000 (UTC)
From: "venkata swamybabu budumuru (JIRA)" <jira@apache.org>
To: cloudstack-issues@incubator.apache.org
Message-ID: <JIRA.12638489.1363949580998.34157.1363949597114@arcas>
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Subject: [jira] [Created] (CLOUDSTACK-1787) [network throttling] Virtual
 Router Guest & Public throttling rates are not working as expected
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venkata swamybabu budumuru created CLOUDSTACK-1787:
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             Summary: [network throttling] Virtual Router Guest & Public throttling rates are not working as expected
                 Key: CLOUDSTACK-1787
                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-1787
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
          Components: Network Controller
    Affects Versions: 4.2.0
         Environment: commit d7f9aa637ebc953928e3d601735bc01f6fcff828

advanced zone with 1 xen cluster 
            Reporter: venkata swamybabu budumuru
             Fix For: 4.2.0


Environment info :

Global Settings : 

network.throttling.rate =  800 mbps (102400 kBytesps)
vm.network.throttling.rate = 300 mbps (38400 kbps)
service offering = host1.small2, network rate = 400 mbps (51200 kbps)

(i) Create a network offering (in my case with name "Offering3Tag1") 
Note : Make sure that nw_rate of above offering is set to 600 mb/s (76800 kbps)
(ii) Create a network "network7" using the above offering i.e "Offering3Tag1"
(iii) Create a network offering "Offering1Tag1" which is not set with any nw_rate value manually.
(iv) create a network "network1" using the above offering "Offering1Tag1"
(v) deploy a VM using the above networks "network1" & "network2"
(vi) Change the network rate for control system network offering to 700 mb/s (i.e. 89600 kbps)

mysql> select * from network_offerings where system_only=1 and id=3\G
*************************** 1. row ***************************
                       id: 3
                     name: System-Control-Network
                     uuid: 97690306-203b-4b99-80bc-7037ed9bab9d
              unique_name: System-Control-Network
             display_text: System Offering for System-Control-Network
                  nw_rate: 700
                  mc_rate: 0
             traffic_type: Control
                     tags: NULL
              system_only: 1
             specify_vlan: 0
      service_offering_id: NULL
            conserve_mode: 1
                  created: 2013-03-20 12:15:10
                  removed: NULL
                  default: 1
             availability: Required
     dedicated_lb_service: 1
shared_source_nat_service: 0
                 sort_key: 0
 redundant_router_service: 0
                    state: Enabled
               guest_type: NULL
       elastic_ip_service: 0
       elastic_lb_service: 0
        specify_ip_ranges: 0
                   inline: 0
            is_persistent: 0
1 row in set (0.00 sec)


Observations :

1. Here is the snippet of qos info about Guest Instance

[root@Rack1Pod1Host11 ~]# xe vif-list vm-name-label=i-3-14-VM params=all | grep qos
          qos_algorithm_type ( RW): ratelimit
        qos_algorithm_params (MRW): kbps: 51200
    qos_supported_algorithms (SRO): 
          qos_algorithm_type ( RW): ratelimit
        qos_algorithm_params (MRW): kbps: 76800
    qos_supported_algorithms (SRO): 

2. [root@Rack1Pod1Host11 ~]# xe vif-list vm-name-label=r-15-VM params=all| grep -i qos
          qos_algorithm_type ( RW): ratelimit
        qos_algorithm_params (MRW): kbps: 102400
    qos_supported_algorithms (SRO): 
          qos_algorithm_type ( RW): ratelimit
        qos_algorithm_params (MRW): kbps: 89600
    qos_supported_algorithms (SRO): 
          qos_algorithm_type ( RW): ratelimit
        qos_algorithm_params (MRW): kbps: 102400
    qos_supported_algorithms (SRO): 

3. From the above output, it is evident that Guest's default network got "51200 kbps" which is picked from the service offering i.e. "host1.small2" which is as expected. and the non-default nic got 76800 kbps which is from network offering i.e. Offering3Tag1 which is also expected.

4. From the above router related output, Control nic got the right qos value i.e. 89600 kbps from the control system network offering. This is expected.

5. but, the rest of the two router vifs i.e. public, guest got 102400 kbps as qos value which is from the global setting network.throttling.rate. 

Issue :

As mentioned in observation (5), Guest and Public nics should get their qos value as 76800 kbps i.e. from the network offering "Offering3Tag1" and it should not acquire it from global setting.

Here is the reference to the document that talks about how throttling settings work in cloudstack

http://support.citrix.com/article/CTX132019

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