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Questions tagged [ipvs]

26 questions
4
votes
1 answer

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 "application" like any other software I am running.…
Michuelnik
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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: -s rr -a -t localhost: -r : -m -w 1 It seems to be running: $ ipvsadm IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags …
OJFord
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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 two Ubuntu servers (18.04) running Keepalived…
Robert
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2
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1 answer

How do I list Docker VIP addresses?

I can list all container IP address inside a docker overlay network using: ~# docker network inspect I'm trying to do resolver troubleshooting in some Docker swarm stack. It seems that resolving is done to the wrong IP address, but I…
Tim
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2
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2 answers

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 symmetrically. I am using Docker 17.12.0-ce and Traefik…
Seemone
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2
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1 answer

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 to set up the LVS on one of these machines. My…
user1965449
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2
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1 answer

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 and int others, until I set up /32, it…
rfmoz
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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: No such file or directory Feb 16 17:02:35 srv…
Alrick
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1
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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 from one IP go to same container. So, here is the…
Flame239
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1
vote
1 answer

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 5 -> 10.47.1.52:domain Masq 10 0 …
Jon Skarpeteig
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1 answer

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. The reasons behind going for LVS are Better L4…
Andy
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1
vote
1 answer

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 virtual destination TCP 00:37 SYN_RECV…
HTF
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1 answer

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? edit: only on ipv4, ipv6 work, rp_filter off,…
Cheuk hei Ho
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0 answers

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 $ uname -rs Linux…
Maksim
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1
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1 answer

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-dns pods are up and running: $ kubectl get pods…
sqw
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