Questions tagged [ipvs]

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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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46 views

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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29 views

Why VRRP require /32 netmask?

In a VRRP configuration I've been using /32 subnet mask but I've never know the reason behind. Sometimes I've using the same subnet mask as the primary interface, like /24, and in some cases it works ...
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68 views

Is IPVS/keepalived as sole load-balancer with persistence a viable alternative to HAProxy sticky sessions?

for a tomcat application I need a simple and resource-effective load-balancing solution. While mod_proxy/mod_jk/HAProxy seem to be among the standard solutions for tomcat, I have discovered that IPVS ...
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24 views

Dual-way NAT forwarding using IPVS?

I want to replace iptables(8) with IPVS for a TCP reverse proxy which involved dual-way NAT. My current setup using iptables is functionally equivalent to a userspace forwarder (like socat(1)). It ...
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205 views

Requests to ipvsadm server hang in state SYN_RECV, direct requests to real server OK

I have IPVS configured as: $ ipvsadm --save -A -t localhost:<port> -s rr -a -t localhost:<port> -r <other_hostname>:<port> -m -w 1 It seems to be running: $ ipvsadm IP ...
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1answer
240 views

IPVS traffic doesn't seem to go through netfilter on the director node

I have the following setup on a director node running keepalived: native IP 10.65.5.72 VIP 10.65.5.230 keepalived DR mode enabled for port 80 and 443 I was debugging a problem where I couldn't ...
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76 views

Keepalived_vrrp issue

Configuration debian version 9.7 architecture ppc64 Issue I am running keepalived and i am encountering an issue with IPVS, here are the logs : Feb 16 17:02:35 srv Keepalived_vrrp[10109]: IPVS: ...
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172 views

Docker UDP 'response'

Simply put, I have 2 containers for a service in a swarm mode. Container receives udp packets and sends them back to multiple clients, which ip's and ports are stored in db. Load-balancing: packets ...
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0answers
786 views

Keepalived forwarding UDP traffic to one node via NAT

I am having issues with load balancing UDP Syslog to my Graylog cluster nodes. At first everything seemed to work normal but it seems that traffic is flowing for 99% to one of the two nodes. I have ...
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1answer
872 views

How do I list Docker VIP addresses?

I can list all container IP address inside a docker overlay network using: ~# docker network inspect <network_id> I'm trying to do resolver troubleshooting in some Docker swarm stack. It seems ...
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1answer
3k views

Publish Docker Swarm services on specific IP addresses

On Centos 7.4 I am setting up a swarm where I want to run multiple routers all reachable on port 80/443. The purpose is to host multiple environment (test/staging...) on a single swarm, all ...
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2answers
660 views

ipvs status and netns?

Is the IPVS effort dead? I can't find docs newer than 2011, and most docs are ca. 2004. It does some interesting things, and I'd like to figure out how to make it work across netns. Specificallty, ...
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1answer
60 views

50% of requests failing to one host

I've encountered a weird bug and ran out of ways to troubleshoot it. I've set up 3 virtual machines: LVS, RS1 and RS2. RS1 and RS2 are running a simple php website. RS2 is an exact copy of RS1 with ...
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1k views

LVS + keepalived for load balancing transparent SQUID proxies

I need to load balance a number of SQUID proxies configured in transparent mode. Below is a simple diagram with one LB and SQUID boxes. ---------- | Client | ...

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