Hello,

 

Did you get a chance to look in to the configurations shared.

 

Thanks & Regards,

Rohini

Cell: +91.9995241298 | VoIP: +91.471.3025332

 

From: Rohini Ambika
Sent: Friday, July 29, 2022 11:35 AM
To: Rahul Sharma <rahul.iitr@...>
Cc: Anil Shashikumar Belur <abelur@...>; Hsia, Andrew <andrew.hsia@...>; Casey Cain <ccain@...>; Luis Gomez <ecelgp@...>; TSC <tsc@...>; John Mangan <John.Mangan@...>; Sathya Manalan <sathya.manalan@...>; Hemalatha Thangavelu <hemalatha.t@...>; Gokul Sakthivel <gokul.sakthivel@...>; Bhaswati_Das <Bhaswati_Das@...>
Subject: RE: [opendaylight-dev] Message Approval Needed - rohini.ambika@... posted to dev@...

 

Hello Rahul,

 

Please find the answers below:

 

1. Official Helm chart @ ODL Helm Chart . Attaching the values.yml for reference
2. Fix was to restart the Owner Supervisor on failure . Check-in @ https://git.opendaylight.org/gerrit/c/controller/+/100357

 

We observed the same problem when tested without K8s set up by following the instructions @ https://docs.opendaylight.org/en/stable-phosphorus/getting-started-guide/clustering.html. Instead of installing odl-mdsal-distributed-datastore feature, we have enabled the features given in the values.yml.

 

Thanks & Regards,

Rohini

Cell: +91.9995241298 | VoIP: +91.471.3025332

 

From: Rahul Sharma <rahul.iitr@...>
Sent: Thursday, July 28, 2022 9:32 PM
To: Rohini Ambika <rohini.ambika@...>
Cc: Anil Shashikumar Belur <abelur@...>; Hsia, Andrew <andrew.hsia@...>; Casey Cain <ccain@...>; Luis Gomez <ecelgp@...>; TSC <tsc@...>; John Mangan <John.Mangan@...>; Sathya Manalan <sathya.manalan@...>; Hemalatha Thangavelu <hemalatha.t@...>; Gokul Sakthivel <gokul.sakthivel@...>; Bhaswati_Das <Bhaswati_Das@...>
Subject: Re: [opendaylight-dev] Message Approval Needed - rohini.ambika@... posted to dev@...

 

[**EXTERNAL EMAIL**]

Hello Rohini,

 

Thank you for the answers.

1. For the 1st one: when you say you tried with the official Helm charts - which helm charts are you referring to? Can you send more details on how (parameters in values.yaml that you used) when you deployed these charts.
2. What was the Temporary fix that reduced the occurrence of the issue. Can you point to the check-in made or change in configuration parameters? Would be helpful to diagnose a proper fix.

Regards,
Rahul

 

On Thu, Jul 28, 2022 at 2:21 AM Rohini Ambika <rohini.ambika@...> wrote:

Hi Anil,

 

Thanks for the response.

 

Please find the details below:

 

1.            Is the Test deployment using our Helm charts (ODL Helm Chart)? –  We have created our own helm chart for the ODL deployment. Have also tried the use case with official helm chart.

2.            I see that the JIRA mentioned in the below email ( https://jira.opendaylight.org/browse/CONTROLLER-2035  ) is already marked Resolved. Has somebody fixed it in the latest version. – This was a temporary fix from our end and  the failure rate has reduced due to the fix, however we are still facing the issue when we do multiple restarts of master node.

 

ODL version used is Phosphorous SR2

All the configurations are provided and attached in the initial mail .

 

Thanks & Regards,

Rohini

Cell: +91.9995241298 | VoIP: +91.471.3025332

 

From: Anil Shashikumar Belur <abelur@...>
Sent: Thursday, July 28, 2022 5:05 AM
To: Rahul Sharma <rahul.iitr@...>
Cc: Hsia, Andrew <andrew.hsia@...>; Rohini Ambika <rohini.ambika@...>; Casey Cain <ccain@...>; Luis Gomez <ecelgp@...>; TSC <tsc@...>
Subject: Re: [opendaylight-dev] Message Approval Needed - rohini.ambika@... posted to dev@...

 

[**EXTERNAL EMAIL**]

Hi, 

 

I belive they are using ODL Helm charts and K8s for the cluster setup, that said  I have requested the version of ODL being used. 

Rohoni: Can you provide more details on the ODL version, and configuration, that Rahul/Andrew requested?

 

On Thu, Jul 28, 2022 at 8:08 AM Rahul Sharma <rahul.iitr@...> wrote:

Hi Anil,

 

Thank you for bringing this up.

 

Couple of questions:

1. Is the Test deployment using our Helm charts (ODL Helm Chart)?
2. I see that the JIRA mentioned in the below email ( https://jira.opendaylight.org/browse/CONTROLLER-2035  ) is already marked Resolved. Has somebody fixed it in the latest version.

 

Thanks,
Rahul

 

On Wed, Jul 27, 2022 at 5:05 PM Anil Shashikumar Belur <abelur@...> wrote:

Hi Andrew and Rahul:

 

I remember we have discussed these topics in the ODL containers and helm charts meetings. 

Do we know if the expected configuration would work with the ODL on K8s clusters setup or requires some configuration changes?

 

Cheers,

Anil 

 

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Date: Wed, Jul 27, 2022 at 9:04 PM
Subject: [opendaylight-dev] Message Approval Needed - rohini.ambika@... posted to dev@...
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Subject: FW: ODL Clustering issue - High Availability

Hi All,

As presented/discussed in the ODL TSC meeting held on 22nd Friday 10.30 AM IST, posting this email to highlight the issues on ODL clustering use cases encountered during the performance testing.

Details and configurations as follows:


* Requirement : ODL clustering for high availability (HA) on data distribution
* Env Configuration:

* 3 node k8s Cluster ( 1 master & 3 worker nodes) with 3 ODL instances running on each node
* CPU : 8 Cores
* RAM : 20GB
* Java Heap size : Min - 512MB Max - 16GB
* JDK version : 11
* Kubernetes version : 1.19.1
* Docker version : 20.10.7

* ODL features installed to enable clustering:

* odl-netconf-clustered-topology
* odl-restconf-all

* Device configured : Netconf devices , all devices having same schema(tested with 250 devices)
* Use Case:

* Fail Over/High Availability:

* Expected : In case any of the ODL instance gets down/restarted due to network splits or internal error, other instance in cluster should be available and functional. If the affected instance is having master mount, the other instance who is elected as master by re-election should be able to re-register the devices and resume the operations. Once the affected instance comes up, it should be able to join the cluster as member node and register the slave mounts.
* Observation : When the odl instance which is having the master mount restarts, election happens among the other node in the cluster and elects the new leader. Now the new leader is trying to re-register the master mount but failed at a point due to the termination of the Akka Cluster Singleton Actor. Hence the cluster goes to idle state and failed to assign owner for the device DOM entity. In this case, the configuration of already mounted device/ new mounts will fail.

* JIRA reference : https://jira.opendaylight.org/browse/CONTROLLER-2035<https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fjira.opendaylight.org%2Fbrowse%2FCONTROLLER-2035&data=05%7C01%7Crohini.ambika%40infosys.com%7C12cedda8fd77459df73b08da6fb6802e%7C63ce7d592f3e42cda8ccbe764cff5eb6%7C0%7C0%7C637945126890707334%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=6yZbWAhTgVdwHVbpO7UtUenKW5%2B476j%2BG4ZEodjBUKc%3D&reserved=0>
* Akka configuration of all the nodes attached. (Increased the gossip-interval time to 5s in akka.conf file to avoid Akka AskTimedOut issue while mounting multiple devices at a time.)


Requesting your support to identify if there is any mis-configurations or any known solution for the issue .
Please let us know if any further information required.

Note : We have tested the single ODL instance without enabling cluster features in K8s cluster. In case of K8s node failure, ODL instance will be re-scheduled in other available K8s node and operations will be resumed.


Thanks & Regards,
Rohini

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---------- Forwarded message ----------
From: rohini.ambika@...
To: "dev@..." <dev@...>
Cc: 
Bcc: 
Date: Wed, 27 Jul 2022 11:03:22 +0000
Subject: FW: ODL Clustering issue - High Availability

Hi All,

 

As presented/discussed in the ODL TSC meeting held on 22^nd Friday 10.30 AM IST, posting this email to highlight the issues on ODL clustering use cases encountered during the performance testing.

 

Details and configurations as follows:

 

• Requirement : ODL clustering for high availability (HA) on data distribution
• Env Configuration:

• 3 node k8s Cluster ( 1 master & 3 worker nodes) with 3 ODL instances running on each node
• CPU :  8 Cores
• RAM : 20GB
• Java Heap size : Min – 512MB Max – 16GB
• JDK version : 11
• Kubernetes version : 1.19.1
• Docker version : 20.10.7

• ODL features installed to enable clustering:

• odl-netconf-clustered-topology
• odl-restconf-all

• Device configured : Netconf devices , all devices having same schema(tested with 250 devices)
• Use Case:

• Fail Over/High Availability:

• Expected : In case any of the ODL instance gets down/restarted due to network splits or internal error, other instance in cluster should be available and functional. If the affected instance is having master mount, the other instance who is elected as master by re-election should be able to re-register the devices and resume the operations. Once the affected instance comes up, it should be able to join the cluster as member node and register the slave mounts.
• Observation : When the odl instance which is having the master mount restarts, election happens among the other node in the cluster and elects the new leader. Now the new leader is trying to re-register the master mount but failed at a point due to the termination of the Akka Cluster Singleton Actor. Hence the cluster goes to idle state and failed to assign owner for the device DOM entity. In this case, the configuration of already mounted device/ new mounts will fail.  

• JIRA reference : https://jira.opendaylight.org/browse/CONTROLLER-2035  
• Akka configuration of all the nodes attached. (Increased the gossip-interval time to 5s in akka.conf file to avoid Akka AskTimedOut issue while mounting multiple devices at a time.)

 

 

Requesting your support to identify if there is any mis-configurations or any known solution for the issue .

Please let us know if any further information required.

 

Note : We have tested the single ODL instance without enabling cluster features in K8s cluster. In case of K8s node failure, ODL instance will be re-scheduled in other available K8s node and operations will be resumed.  

             

 

Thanks & Regards,

Rohini

 

 

--

- Rahul Sharma

 

--

- Rahul Sharma