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configuration utility restarting (upgrade)
- Oct 18, 2017
Due to concerns about the default vhost receiving health checks, I settled on using the correct service hostname in the GET and I can use the same health check on LTMs at both our datacenters. We will need to create a unique check/header for each new service, which is not terrible.
current health check: GET /path/image.svg HTTP/1.1\r\nHost: service.domain.com\r\nConnection: Close\r\n\r\n
99% there, you need to assign a self-ip for the HA_Heartbeat VLAN, I normally use 1.1.1.1 for the active and 1.1.1.2 for the standby devices. I would also make sure the HA_Heatbeat VLAN is untagged. Once you do this then go to the configsync setup and set the relevant ip addresses. Once you do this you will be able to sync on the dedicated cable.
I would also setup redundancy to use the HA_Heartbeat addresses as well as the mgmt addresses. Just gives you more redundancy.
Once this is all done and setup take a qk view and log into ihealth.f5.com and upload the file. This site is great and will analyse your configuration and give you tips/fixes etc.
Hope this helps, let us know how you get on.
David.
- djimenezFeb 21, 2025
Nimbostratus
This is an old post but i had the same question and i managed to do it but using 127.0.0.1 as host ip.
for example:
get /index.html HTTP/1.1\r\nHost: 127.0.0.1\r\nConnection: Close\r\n\r\n - stan_peachey_86Oct 18, 2017
Cirrus
Due to concerns about the default vhost receiving health checks, I settled on using the correct service hostname in the GET and I can use the same health check on LTMs at both our datacenters. We will need to create a unique check/header for each new service, which is not terrible.
current health check: GET /path/image.svg HTTP/1.1\r\nHost: service.domain.com\r\nConnection: Close\r\n\r\n
- Lee_SutcliffeOct 18, 2017
Nacreous
I've not tried this myself but I 'think' if you configure your pools as using FQDNs (Ephemeral pool) then the health monitor will attempt to use DNS.. whether this translates to the GET request in the monitor using the correct host name I don't know but I'd been curious to know.
If I get chance I may test this later on this evening.
MP
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