I have installed openstack(queens) in my Centos7.4(azure), the architecture is controller + compute.
After installed, I found that neutron-linuxbridge-agent had a very high cpu load, mostly 100%. How can I fix that?
Related
I used Confluent for Kubernetes solution to use a Kafka cluster on my bare metal server. Monitoring all pods I noticed that controlcenter-0 pod take more and more ram gradually. Why this behavior?
In a night it reached almost 6GB.
I have an OpenStack VM that is getting really poor performance on its root disk - less than 50MB/s writes. My setup is 10 GbE, OpenStack deployed using kolla, the Queen release, with storage on Ceph. I'm trying to follow the path through the infrastructure to identify where the performance bottleneck is, but getting lost along the way:
nova show lets me see which hypervisor (an Ubuntu 16.04 machine) the VM is running on but once I'm on the hypervisor I don't know what to look at. Where else can I look?
Thank you!
My advice is to check the performance first between host (hypervisor) and ceph , if you are able to create a ceph block device, then you will able to map it with rbd command , create filesystem, and mount it - then you can measure the device io perf with : sysstat , iostas, iotop, dstat, vmastat or even with sar
I have a simple location block in nginx conf which echo's back the Server's ip. Its deployed on a 2 core 4gb ram EC2. i am able to get 400 req per second on load testing it.
Made optimizations like logs buffering, opening more FD, followed guidelines in http://www.freshblurbs.com/blog/2015/11/28/high-load-nginx-config.html.
The peak cpu load on the node is 4-5% and same for memory. I am wondering how can i blow it up even further. Will using Docker help or the cpu load & memory is irrelevant here as it might be running into network congestion. Will increasing EC2 Node size help ?
OS: CentOS. Any help appreciated. Thanks !
I am using Cloudify 2.7 with OpenStack Icehouse.
I developed a tomcat recipe and deployed it. In the orchestrator log of the cloudify console, I read the following WARNING:
2015-06-04 11:05:01,706 ESM INFO [org.openspaces.grid.gsm.strategy.ScaleStrategyProgressEventState] - [tommy.tomcat] machines SLA enforcement is in progress.; Caused by: org.openspaces.grid.gsm.machines.exceptions.ExpectedMachineWithMoreMemoryException: Machines SLA Enforcement is in progress: Expected machine with more memory. Machine <Public_IP>/<Public_IP> has been started with not enough memory. Actual total memory is 995MB. Which is less than (reserved + container) = (0MB+3800MB) = 3800MB
The Flavor of the VM is: 4GB RAM, 2vCPU, 20GB Disk
Into the cloud driver I commented the following line:
//reservedMemoryCapacityPerMachineInMB 1024
and configured the compute section related to the flavor as following:
computeTemplate
{
imageId <imageID>
machineMemoryMB 3900
hardwareId <hardwareId>
...
}
Can someone help me to pointing out the error?
Thanks.
The error message states that the actual available memory is only 995MB, which is considerably less than the expected 4GB. To clarify that:
do you run multiple services on the same machine?
maybe the VM really has less memory than expected. please run 'cat /proc/meminfo' on the started VM to verify the exact memory it has
In principle, you should not comment out any setting of reserved memory because Cloudify must take that into account - this setting is supposed to represent the memory used by the OS and other processes. additionally, the orchestrator (ESM) takes into account ~100 MB for cloudify to run freely.
So, please update machineMemoryMB to the value calculated this way:
(the number returned by 'cat /proc/meminfo') - 1024 - 100
I have installed xen as hypervisor and there are dom0 and some paravirtualized machins as domu VMs on it.
I know xentop is used for checking the performance of system and virtual machines and I can read the output of it for measuring the virtual machine cpu utilization, But, it just gives the total usage of cpus!
So, is there any tool or any way to get cpu usages per cores?
I think you may be able to get what you want from XenMon. http://www.virtuatopia.com/index.php/Xen_Monitoring_Tools_and_Techniques
Also, try using xentop with the VCPUs option: -v or press V when inside xentop.
If you are using XenServer, then there are lots of interesting host metrics available, much more than the base Xen setup. Check out http://support.citrix.com/servlet/KbServlet/download/38321-102-714737/XenServer-6.5.0_Administrators%20Guide.pdf, Chapter 9.
It's all particularly good if you use XenCenter to view those metrics, but then I would say that since I wrote a significant portion of it ;-)