Questions tagged [keepalived]
an open source daemon that implements the VRRP standard.
248
questions
14
votes
3
answers
20k
views
Prevent VRRP Master from becoming Master once it has failed
I have two machines (A and B, A is Master) running VRPP (from keepalived) for a Virtual IP.
How can I prevent A from becoming Master again if it has failed and come back up (for whatever reason)?
I'...
- 283
13
votes
7
answers
142k
views
HAproxy 503 Service Unavailable No server is available to handle this request
I'm new to this load balancing scenario and I'm being tasked to figure out how to make this load balancing works.
My environment:
Centos 6.4 64 Bit
Webserver: Lighttpd
All running in ESXI
virtual ...
- 421
13
votes
2
answers
29k
views
Keepalived for more than 20 virtual addresses
I have set up keepalived on two Debian machines for high availability, but I've run into the maximum number of virtual IP's I can assign to my vrrp_instance. How would I go about configuring and ...
- 1,136
12
votes
9
answers
75k
views
View Current State of Keepalived
Is there a way to view the current state (Master/Backup) using a command line inside a server instance?
Cheers
- 263
11
votes
3
answers
39k
views
keepalived VRRP_script not failing over
So I am running keepalived on two servers and I can't get it to failover to the other.
Below I have my config for one of the servers. The only different between the two is the priority numbers master ...
- 213
10
votes
1
answer
23k
views
Keepalived send gratuitous ARP periodically
Is there a way for a keepalived to send gratuitous ARP periodically?
We had following situation:
switch failure (VLAN setup)
keepalived failovered to backup instance
backup instance sent gratuitous ...
- 638
9
votes
1
answer
29k
views
Keepalived's virtual_router_id - should it be unique per node?
I have two nodes running keepalived, and two VIP, e.g.
Node 1 Node 2
VIP1 VIP2
So in each node, I have two definition of vrrp_instance, so I assume the two vrrp_instance in my keepalived....
- 6,101
9
votes
5
answers
13k
views
keepalived doesn't detect loss of virtual IP
I'm using keepalived to switch a floating IP between two VMs.
/etc/keepalived/keepalived.conf on VM 1:
vrrp_instance VI_1 {
state MASTER
interface ens160
virtual_router_id 101
...
- 25.3k
8
votes
3
answers
14k
views
Any problems with having an active/active HAProxy setup with Keepalived
Apologies if this has been asked before, but I can't seem to find much on it.
We're going to be using HAProxy to load balance our MariaDB Galera Cluster. All the articles/tutorials I have seen on ...
- 397
7
votes
6
answers
24k
views
keepalived nopreempt option not working
I want to use nopreempt option with keepalived vrrp setting to run backup node as master when master goes down and again reback into network.
I setup nopreempt option in both servers and set state as ...
- 81
6
votes
7
answers
52k
views
Both servers running keepalived become master and have a same Virtual IP
Both two servers started keepalived, and the BACKUP server transited to MASTER STATE immediately.
both two became MASTER now.
Both two nodes are sending VRRP advertisement msg.
on master server:
[...
- 113
6
votes
1
answer
7k
views
Keepalived not sending mutlicast advertisments
I have two systems, both VMs. The are configured to use Bridged networking. I am trying to get keepalived to manage ownership of a VIP - 10.190.1.230. I have tried two versions of keepalived-1.2.2 and ...
- 163
6
votes
2
answers
5k
views
UCARP: prevent the original master from taking over the VIP when it comes back after failure?
Keepalived can do this by combining the nopreempt option and the BACKUP state on the both nodes:
Prevent VRRP Master from becoming Master once it has failed
Prevent master to fall back to master ...
- 52k
6
votes
1
answer
23k
views
Logging Verbosity in Keepalived.conf?
My keepalived VIP on one of my routers stopped responding. I still saw it on the primary router and not the secondary router as I would expect, and I could ping the regular IPs. As soon as I restarted ...
- 84.6k
6
votes
2
answers
3k
views
keepalived issues on xen domU
I cannot manage to run keepalived correctly on xen domU.
I am following this link for configuration, and it works great on some local VM (running with KVM). If I set up the exact same configuration, ...
- 243
6
votes
2
answers
4k
views
keepalived master cannot reclaim virtual IP after recovered
Steps
Start both master and slave
Keep pinging virtual ip (i.e 192.168.10.100)
Shutdown master
Slave enters MASTER state
Restart master
Slave enters BACKUP state and Master enters MASTER state
Ping ...
- 161
5
votes
2
answers
5k
views
Start keepalived without IP on interface?
I want to use keepalived on an interface that will get an IP at some point but will not have one initially, can I set this up somehow in the config? If I try to start it now keepalived errors out as ...
- 253
5
votes
1
answer
3k
views
haproxy and keepalived on Amazon EC2
The new Amazon Opsworks service uses haproxy rather than Amazon's own very limited elastic load-balancer so I started investigating haproxy as a better option for load-balancing our web app servers, ...
- 51
5
votes
1
answer
2k
views
connection sync suggestions with HAproxy and keepalived
I managed to get HAproxy working in a failover configuration as suggested on the architecture.txt document using keepalived.
I used CentOS 5.5, HAproxy rpm (haproxy-1.3.25-1.el5) from epel repo, and ...
- 744
5
votes
1
answer
4k
views
Meaning of virtual_ipaddress_excluded in keepalived configuration
I had some problems with my keepalived configuration and found the answer in this post: Keepalived for more than 20 virtual addresses
But I am not sure about the difference between virtual_ipaddress ...
- 51
5
votes
1
answer
2k
views
keepalived config is not working correctly with virtualbox vms
my keepalived configuration is not working correctly.
I have two virtual testing machines (virtualbox) to try some things out with keepalived/vrrp. Bot can ping each other flawlessly (internal ...
- 97
4
votes
1
answer
8k
views
How to configure Failover IPs for High Availability with Hetzner Online
I have a cluster of 3 Ubuntu nodes running in VMs in the lab and want to take it now to production. Hetzner Online hetzner.de offers some good value dedicated servers, so I rented 3 machines, ...
- 2,192
4
votes
2
answers
8k
views
Per-packet round-robin load balancing for UDP
I need to load-balance UDP traffic between a number of "realservers" and do it in a truly round-robin fashion. I've started with keepalived, but unexpectedly discovered, that LVS treats UDP traffic as ...
- 812
4
votes
1
answer
8k
views
How to use Docker with HAProxy+Keepalived?
I want to practise in creation of high-available web-application using multiple Docker containers on one machine.
I launch several web-servers within Docker containers. Say, three servers rest1, ...
- 141
4
votes
1
answer
10k
views
How to set up tcp check with keepalived?
Trying to set up HA bastion servers. Failover, load balancing is not needed. Two servers running debian. bastion01 and bastion02. 192.168.0.10 and 192.168.0.11. Floating IP is 192.168.0.12.
I started ...
- 2,313
4
votes
1
answer
2k
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?
- 243
4
votes
1
answer
4k
views
keepalived - Virtual is not routing my requests to real servers
I'm playing around with keepalived and running that setup on my master node:
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 150
advert_int 1
...
- 41
4
votes
1
answer
7k
views
Centos 7 - Keepalived Linux Virtual Server is not working
Environment:
Centos 7
Keepalived
Machine I
enp0s3 --> 192.168.1.38 (connects to the outside world)
en0s8 --> 192.168.100.101 (connects to internal network)
Machine II
enp0s3 --> 192.168.100....
- 151
4
votes
1
answer
9k
views
keepalived: 2nd VRRP_Script never seems to run
I'm trying to implement keepalived on 3 mongodb boxes, the idea is that if mongod on one of the boxes goes down or we need to move the primary node to another system for some reason our application ...
- 991
4
votes
1
answer
5k
views
keepalived - no connect and doesn't listen on ports?
Following servers:
....:100::10 mysql1 master
....:100::20 mysql2 master
....:100::30 loadbalancer (keepalived) with virtual ip ...:100::40
Config:
vrrp_instance V1 {
state MASTER
interface ...
- 255
3
votes
2
answers
4k
views
Keepalived over GRE tunnel for failover on VPS environment
I'm running an application on Linode. Their network does not support multicasting. Many tools used for failover (keepalived, spread/wackamole, hearbeat) require multicast to work (as far as I know). I'...
- 299
3
votes
1
answer
12k
views
Keepalived router on virtual ip is not reachable
I've setup keepalived to manage a virtual ip between two hosts.
My setup is the following
Server #1: Hostname folmer, ip 192.168.0.1/22 dev p2p1
Server #2: Hostname flemming, ip 192.168.0.2/22 dev ...
- 218
3
votes
2
answers
9k
views
VIP not dropping from backup keepalived
I may not be understanding how this is supposed to work, but I can't figure out why the BACKUP system with this basic vrrp_instance is transitioning to master right away and never seems to honor the ...
- 145
3
votes
2
answers
2k
views
When a server IP changes, do exising TCP (e.g. http/mysql) connections remain running
We have some PHP-FPM servers and when they need a database connection, they connect to an HAProxy server which selects them a database server to use and the connection opens. When we then want to ...
- 397
3
votes
3
answers
5k
views
keepalived shutdown - does not run "notify" hook on daemon shutdown
I'm running keepalived under Debian (Lenny, Squeeze) in a fairly
simple setup, I'm just (ab)using it as a VRRP daemon to decide the
mastership
between two equal machines for some virtual IPs.
All the ...
- 3,510
3
votes
1
answer
10k
views
HAProxy + keepalived + multiple backend farms / virtual IP addresses
we have several backend farms (HTTP, FTP, etc), basically one farm for each customer, and I am about to rebuild our load balancing infrastructure, moving from Piranha to HAProxy.
Since we are using ...
- 339
3
votes
1
answer
11k
views
keepalived track_script doesn't seem to run
I'm hoping someone can see what I'm doing wrong and offer help to get a keepalived track_script to run.
I have the priority set to 101 on the vrrp_instance of the primary keepalived box and 100 on ...
- 145
3
votes
2
answers
5k
views
Adding IPs to Keepalived
What is the proper way to add IP addresses to a keepalived vrrp_instance without have the IPs flop around or drop for a second?
- 84.6k
3
votes
2
answers
8k
views
Why is keepalived running two MASTER nodes in my Sticky VIP configuration?
I have keepalived setup (floating VIP) in front of haproxy on each of my three-node galera cluster nodes. When I restart keepalived on any given node, sometimes I end up with two nodes running in ...
- 3,804
3
votes
2
answers
5k
views
Prevent master to fall back to master after failure
I'm using keepalived to setup a virtual ip that points to a master server. When a failover happens it should point the virtual ip to the backup, and the IP should stay there until I manually enable (...
- 483
3
votes
1
answer
689
views
Virtual IP Failover when machine is overloaded
We have been using keepalived in combination with a virtual IP address for two years now. In the rare case that a machine crashes this works very well.
But when there are issues on the box itself we ...
- 31
3
votes
2
answers
2k
views
keepalived questions (requirements, abilities, limitations)
1) What are keepalived's (physical/network) requirements? Does the two (or more) keepalived' nodes need to be connected to the same switch? (something related to broadcasting maybe).
2) Can ...
- 315
3
votes
1
answer
1k
views
Trying to use keepalived for failover and forwarding but getting "Keepalived_healthcheckers[1706]: TCP socket bind failed. Rescheduling."
The goal is to get two different CentOS 7 VMs with keepalived installed to perform failover with VIP 192.168.1.11 and also forward the http (to become https shortly after this works) traffic to a ...
- 31
2
votes
2
answers
9k
views
KeepAlived on different subnets
I am trying to setup keepalived on ESXi based setup where 2 physical box have ESXi installed and each one having a node which works as load-balancer using HAProxy. Now in order to achieve high ...
- 148
2
votes
3
answers
5k
views
keepalived wont start
I have compiled and configured keepalived but it won't start.
This is my very basic config;
vrrp_sync_group PUBLIC_WEB_IPS {
group {
public_http_ip_lan
...
- 4,272
2
votes
1
answer
2k
views
Keepalived with apache unable to bind interface on Backup server
I have two debian 6 servers running keepalived 1.1.20 with one server acting as a Master and the other as a Backup. Both servers host apache 2.4 that have a global Listener on all interfaces on port ...
- 33
2
votes
1
answer
3k
views
Something like VRRP/keepalived without MAC address impact? (RHEL 8) [closed]
I am looking to set up a cluster (of two systems) with a VIP, just what keepalived would do. In a different context, I already have keepalived working well. However, our network team told me not to ...
- 978
2
votes
1
answer
2k
views
How would you set up multiple SSL terminating Haproxy instances, which are themselves load balanced?
I've been doing a great deal of research and experimentation on this, and I'm really running into a wall:
I'm trying to set up HAProxy as the reverse proxy for a high-availability environment. All ...
- 123
2
votes
2
answers
3k
views
Keepalived load balancing MySQL. Backup server time-out
Dear beloved people at ServerFault. I'm trying (and failing) to setup a load balanced MySQL server array. Please enlighten me, show me the error in my ways.
Current setup: two MySQL servers with ...
- 21
2
votes
1
answer
8k
views
Keepalived: multicast vs unicast
I'm planning to deploy a several keepalived routers to maintain floating IPs for different database clusters. The plan is to deploy a separate VRRP instance on each cluster locally according to this ...
- 3,208