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Questions tagged [ipvs]

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Global Server Load Balancing for OpenVPN over OpenVPN with DSR

Ok, so...I am in no sense a pro when it comes to networks, load balancing, tunneling or VPN connections BUT I tried a few things to get this theoretical concept to work - obviously without success. ...
MathiveProblem's user avatar
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0 answers
118 views

Linux IPVS in DR mode on vyos router/firewall not forwarding reply packets

I am setting up setup where: I use vyos as router/firewall on vyos i setup also IPVS in DR mode. It means that IPVS changes request packet MAC-address to realserver MAC-address and forwards packet ...
meelis's user avatar
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1 vote
1 answer
168 views

Packet with same src addr with loop back beening dropped

There are two servers with the same VIP, and when one server curls another server, the reply packet (which has src addr same as lo addr) seems to be dropped by the request server. How can I allow it? ...
Cheuk hei Ho's user avatar
0 votes
1 answer
115 views

ipvsadm rewriting virtual service ip address

$ sudo ipvsadm -A -u 127.10.5.5:1293 $ sudo ipvsadm -L IP Virtual Server version 1....
keyandthegate's user avatar
1 vote
0 answers
605 views

Why is access to Kubernetes lost if I turn on the IPVS mode?

The problem is that after enabling the IPVS mode in the kube-proxy, everything works fine for me. But as soon as I install Traefik, I immediately lose connection with Kubernetes. OS: CentOS 7.9 $ ...
Maksim's user avatar
  • 113
0 votes
1 answer
646 views

How do routing rules from IPTables, IPVS, and NFTables get ordered from a precedent perspective, in the Linux kernel?

The Linux kernel has the ability to route traffic using nftables, iptables, and ipvs. Ive collected 3 related questions here, in order to generally ask the broader overall question of how ...
jayunit100's user avatar
0 votes
1 answer
659 views

k8s loadbalancer service with externalTrafficPolicy=local passes through client ip on IPv4, hides it on IPv6

I'm having trouble getting a kubernetes IPv6 SingleStack LoadBalancer service passing through the correct source IP address to pods. It works fine on a sister IPv4 SingleStack LoadBalancer that passes ...
growse's user avatar
  • 8,060
1 vote
1 answer
4k views

Kubernetes : kube-dns service not accessible via ClusterIP

Following an upgrade to v1.19.7 with kubeadm, my pods are unable to request the kube-dns service via the service's ClusterIP. When using the kube-dns pod IP address instead, DNS resolution works. kube-...
sqw's user avatar
  • 11
0 votes
0 answers
290 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 ...
Vignesh SP's user avatar
2 votes
1 answer
871 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 ...
rfmoz's user avatar
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1 vote
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846 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 ...
iBug's user avatar
  • 1,338
2 votes
0 answers
768 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 ...
OJFord's user avatar
  • 151
0 votes
1 answer
848 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 ...
Shimin Guo's user avatar
1 vote
0 answers
148 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: ...
Alrick's user avatar
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1 vote
0 answers
439 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 ...
Flame239's user avatar
2 votes
0 answers
2k 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 ...
Robert's user avatar
  • 121
2 votes
1 answer
3k 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 ...
Tim's user avatar
  • 133
2 votes
2 answers
6k 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 ...
Seemone's user avatar
  • 23
-1 votes
2 answers
966 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, ...
Tim Hockin's user avatar
0 votes
1 answer
66 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 ...
Kuba Orlik's user avatar
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0 answers
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 | ...
faraway's user avatar
2 votes
1 answer
5k views

Setting up a LVS on CentOS

I have a 3 node(dedicated servers from a provider) CentOS 7.x cluster. I am trying to set up LVS using the link here. Each of my machines already has 3 extra alias IP addresses assigned to it. I want ...
user1965449's user avatar
1 vote
1 answer
2k views

Load balancing Bind9 with Keepalived and LVS

How can I correctly configure LVS to masqerade/NAT packets from virtual ip to/from clients? Currently I have: UDP 10.47.1.80:domain rr -> 10.47.1.51:domain Masq 10 0 ...
Jon Skarpeteig's user avatar
1 vote
1 answer
2k views

LVS + HA Proxy for L4 to L7 load balancing

Currently we are using HA proxy for our load balancing needs. We are planning to integrate LVS with HA proxy to create a load balancing solution that can take care of L4 to L7 load balancing and HA. ...
Andy's user avatar
  • 11
1 vote
1 answer
6k views

Keepalived sync daemon

I've enabled lvs_sync_daemon_interface option however it looks like sync daemon is not working Active node: [MASTER:~]# ipvsadm -Lnc IPVS connection entries pro expire state source ...
HTF's user avatar
  • 3,198
4 votes
1 answer
684 views

Monitoring Linux Kernel Space Processing

I'm running two "services" that are served in linux kernel-space: Linux Netfilter Firewall ("iptables") Linux Virtual Server Loadbalancer ("IPVS", "LVS") Now I want to (performance-)monitor my "...
Michuelnik's user avatar
  • 3,490