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Questions tagged [failover]

The tag has no usage guidance.

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Is there a configuration for SLES failover cluster?

I have two nodes configured as cluster and I am currently trying to test the failover but I was wondering if there would be a configuration file which could display the failover settings.
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Currently I have two node cluster (SLES as HANA DB). I would like to check in which condition a failover will be triggered?

Below are the conditions. We could not test these because these nodes are already in production. Replication between the nodes fail. Replication is working but network link is down with no bonding. ...
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Gateway failover using netplan

I'm having trouble setting up 2 IP address so that if one fails it will use the secondary IP address. I've setup netplan as shown in the picture. I can connect via ssh using both IP address, I test ...
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1answer
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How to verify which is primary node in a HANA DB cluster operating on SLES 12?

Currently I have two HANA DB servers in a cluster and replication is not running. Upon checking from SUSE Hawk, node 2 is acting as primary node and node 1 is available. How do I confirm that node 2 ...
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1answer
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What can I do to enable automatic switching to a backup network when there is packet loss?

If I create a connection using network bonding (using the mode active-backup), then although automatic switching to the backup network occurs if I pull out the network cable, it does not occur when ...
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1answer
377 views

Is it possible to allow multiple SSH host keys for the same IP?

I have a script that needs to connect to the currently active head of a high-availability cluster. Each node in the cluster has a fixed hostname and IP address. The current head additionally has a "...
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1answer
49 views

Triangular direct connect ethernet network using the 2 possible paths (bonding + failover)

imagine this topology: A / \ B --- C In this situation, A can talk to B using the A <> B link of couse, but could also use the A <> C <> B links. Is it possible with a linux ...
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383 views

Linux bonding failover issue between two cisco switch

I have above scenario where server has bond0 interface connected to SW1 and SW2 relevant interface of server, last night somehow SW1 got rebooted and server lost eth0 connectivity but it didn't ...
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DHCP failover issue DHCPDISCOVER via eth0: not responding (recovering) [closed]

I´m trying to configure a DHCP server. But when the host1 is active, if I try to up the DHCP service on the host2. fails... If I not add comments (disable) in the failover configuration part, the ...
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0answers
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Cannot SSH to VPS After ifup?

I have a vps hosted by OVH with CentOS installed. I purchased 9 failover IPs and configured them as eth0:1-eth0:8. After I edited the config files to what was recommended by OVH as: DEVICE="eth0:0" ...
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keepalived: How to only demote master if a backup can take over?

I am currently trying to setup a highly available system using keepalived. I have a check-script that returns rc=0 if the host it is executed on is the master. Unfortunately this script can fail for ...
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How to route to Virtual IP as gateway

I have environment on Centos 6.7 Final, 2 Loadbalancer failover (Haproxy, keepalived), 3 Web Server (nginx - PHP-Fpm). LB1 (Public x.x.x.233, Private 10.110.120.21), LB2 (Public x.x.x.235, Private 10....
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2answers
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apache failover solution

We have 2 Apache Web-Servers which is getting replicated with rsync command, when the primary host is down, we manually change the IP and make it up. Now we are trying to find way to do an ...
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3answers
8k views

GlusterFS how to failover (smartly) if a mounted Server is failed?

In GlusterFS, lets say i have 2 Nodes (Servers) on a Volume. Lets say the volume info is something like this: Volume Name: volume-www Brick1: gluster-server-01:/volume-www/brick Brick2: gluster-...
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1answer
808 views

Why can I connect to the IP of a network interface (on a server with multiple network interfaces) when the network cable is removed?

I have a Server with multiple (four) network interfaces running Arch Linux when I encountered something strange that I cannot explain. I have two interfaces configured to the the ip addresses 192.168....
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1answer
245 views

Failover boot setup

I am considering a failover boot setup which can tolerate any single drive loss. The primary system partitions (/, /home, /usr etc.) shall reside on a flash drive. /var and /tmp partitions shall be ...
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1answer
296 views

How to make HA Heartbeat failover when either of two NICs connection is lost?

I was successful in configuring a simple Heartbeat setup on Ubuntu 12.04, which will fail-over two VIPs to a second server when BOTH Ethernet links fail. What I can't figure out is how to fail-over ...