Questions tagged [lvs]

LVS is the Linux Virtual Server, www.linuxvirtualserver.org. It offers persistent load balancing built ontop of the linux kernel.

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Linux LVS reach outside issue

I cannot reach over VIP outside, but i can reach inside. How can i solve this issue ? LVS server VIP: 192.168.1.230 LVS IP: 192.168.2.230 Apache: 192.168.2.200 sysctl -p net.ipv4.ip_forward = 1 net....
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IPVS transmitting packets to incorrect backends

We are using ipvs for L4 loadbalancing which transmits packets to L7 backends on ipip tunnel mode. There are three ipvs systems configured with source hashing for persistence. Sometimes, ipvs is ...
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Keepalived same host for real server and load balancer

I've came across following note (keepalived - Virtual is not routing my requests to real servers): Accessing the virtual IP from the load balancers or one of the real servers is not supported. ...
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Where do my LVS packets end?

For historic reasons I had set up a LVS loadbalancer on SLES using a "redirector" written by myself. That redirector would accept UDP packets on one address:port and send them to another. Accordingly ...
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Minimize Keepalived up/down smtp notifications during apache reloads

We have several keepalived services, with LVS configured on the individual real servers. Currently we are receiving an up/down notification for individual real servers within a virtual server ...
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Best strategy for keep-alives on LVS load balancer

We have Linux Virtual Server load balancers distributing about 300 requests per second to 2 pools of 4 Windows servers running IIS. These requests are mostly for server-rendered content (ASPX), ...
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29 views

the strange value of SRE in a D-SACK packet

I'm troubleshooting a strange network issue in our production environment. The dumped pcap file comes from the full NAT mode LVS , and the toploy of the ip address in the dump file is: 172.19.132.90(...
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612 views

keepalived: what are the `fo` and `mh` lvs scheduling algorithms?

The parameter virtual_server.lvs_sched in keepalived.conf supports two options for which I can't find an explanation: fo and md. Does anyone know their meaning?
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1k views

IPVS (keepalived) doesn't balance UDP connections

I have two load balancer with Debian 8 and three Graylog server with Debian 9. Every server in my network sends logs via rsyslog to a virtual server configured on the LB. The connection is UDP. The ...
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267 views

Corosync cluster will not bind vips to loopback, so apache fails to start in CentOS 7

I have a problem getting apache to work in a corosync cluster. I probably sifted through more than hundred web pages and a couple of dozen Google Searches, and was not able to find any matching ...
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1k views

vgdisplay not showing free PE / Size space

I have Dell PowerEdge R730xd running Centos 6. I just added more physical disks to our raid and used open manage to increase the raid size, which is now at 67,063.50GB. I'm using xfs and have a lv (...
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1k views

Install Google Seesaw Load Balancer

I have been trying to setup Google Seesaw which is a load balancer based on LVS but have been unsuccessful so far following the directions [on the index.md and /doc/getting_started.md). It is stated ...
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42 views

If cluster node acting as a load balancing router fails, can we dircet future requests to any one active real server?

For load balanced cluster that I am using, in case of router node fails, setup takes nearly 2 minutes until the VIP comes online on another running node (which earlier acted as real-server node). All ...
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3k views

AWS ElasticBeanstalk docker-thin-pool getting full and causing re-mount of filesystem as read-only?

I can't figure out how AWS sets up their Docker 'thin pool' on ElasticBeanstalk and how it is getting filled. My docker thin pool is filling up somehow and causing my apps to crash when they try to ...
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718 views

LVS router stopped working after reboot

I am using RHEL 6.8 for load balancing using LVS direct routing. For some reason I had to restart my LVS router. after rebooting, LVS service was not working I have done following things, still it is ...

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