Forum Discussion
Chris_Chaloux_1
Nimbostratus
NimbostratusLTM Maint. Page issue
All -
I am trying to set up the LTM Maintenace Page example and I'm running into an issue. I have set up the rule exactly as described in the document (http://devcentral.f5.com/Wiki/default.aspx/iRules/LTMMaintenancePage.html).
The issue I am having is that instead of the lindex html stream being returned, it is returning the location of the class file to the browser. When I invoke the rule by going after the VIP from my browser, the only display I get is:
/var/class/maint.index.html.class
Thats it! It seems like either a variable isnt being invoked correctly, or for some reason it is interpreting the call to the class file as a literal.
My iRule reads like this:
when HTTP_REQUEST {
Service requests for files (URIs) from the maintenance page
Note that we always service these pages, even if the http_pool is up
set maint_prefix "/maintenancepage"
set maint_len [string length $maint_prefix]
set uri [HTTP::uri]
log local0. "redirect: [HTTP::uri]"
if { $uri equals ${::maint_prefix} } {
HTTP::respond 301 "Location" "${::maint_prefix}/"
return
}
if { $uri starts_with "${::maint_prefix}/" } {
trim off the maintenance prefix
set uri [string range $uri $::maint_len end]
Return the requested page
log local0. "respond: [lindex $::maint_index_html 0]"
switch $uri {
"/" -
"/index.html" { HTTP::respond 200 content [lindex $::maint_index_html 0] "Content-Type" "text/html" }
"/logo.png" { HTTP::respond 200 content [b64decode [lindex $::maint_logo_png 0]] "Content-Type" "image/png" }
default { HTTP::respond 404 }
}
return
}
If the all members in the default pool are down, redirect to the maintenance page
if { [active_members [LB::server pool]] < 1 } {
HTTP::redirect "${::maint_prefix}/index.html"
return
}
}
Does anyone see whats going on? This is driving me nuts!!
Thanks,
Chris
15 Replies
Nit_67494Hi All,
I have a new update, I successfully copy and create the irules, but my webpage show this:
maint_index_html_class
Not the maintenance page that I created,
Please help..
Thanks- Nit_67494Hi Aaron,
I'm using LTM BIG-IP 10.0.1 Build 378.0 Hotfix HF3, now I successfully created the irules but, the html page show only:
maint_index_html_class - Nit_67494Hi Aaron,
I do b class list all
below is the result:
class maint_index_html_class {
type string
timestamp 2010-11-23 09:36:52
filename "/var/class/maint.index.html.class"
mode rw
separator ":="
partition Common
"Maintenance page
Sorry! This site is down for maintenance."
}
class maint_logo_png_class {
type string
timestamp 2010-11-23 15:23:48
filename "/var/class/maint.logo.png.class"
mode rw
separator ":="
partition Common
{
" "
"iVBORw0KGgoAAAANSUhEUgAAAL4AAAC3AgMAAADRFQzGAAAACVBMVEUAAADDAAD///8UoaPIAAElFTkSuQmCC"SLUHbWwzRlvrS1spJalnVcanB9Evvj8aLuZ3BX1Y1P+AUbgLzbWCp20NpfmAAAA
}
}
anything wrong in the class?
the irules as below:
when HTTP_REQUEST {
Service requests for files (URIs) from the maintenance page.
Note that we always service these pages, even if the http_pool is up.
The maintenance prefix should be unique in the application and
not conflict with an existing directory on the web servers.
set maint_prefix "/maintenancepage"
if { [HTTP::uri] starts_with "$maint_prefix" } {
Strip off the $maint_prefix from the URI as you can't easily do variable expansion
within a switch statement.
Note that requests for the exact maintenance prefix URI will be set to a null string,
so handle null in the first switch case.
set uri [string map [list $maint_prefix ""] [HTTP::uri]]
Return the requested page based on the requested URI
switch -- $uri {
"" {
log local0. "Request for $maint_prefix. Redirecting to $maint_prefix/"
HTTP::redirect "$maint_prefix/index.html"
}
"/" -
"/index.html" {
log local0. "Request for index. Responding with content: [lindex $::maint_index_html_class 0]"
HTTP::respond 200 content [lindex $::maint_index_html_class 0] "Content-Type" "text/html"
}
"/logo.png" {
log local0. "Request for logo.png. Responding with binary content"
HTTP::respond 200 content [b64decode [lindex $::maint_logo_png_class 0]] "Content-Type" "image/png"
}
default {
log local0. "Unrecognized request to URI: [HTTP::uri]"
HTTP::respond 404 content "Unrecognized request to [HTTP::uri]" "Content-Type" "text/html"
}
}
return
}
If the all members in the default pool are down, redirect to the maintenance page
if { [active_members [LB::server pool]] < 1 } {
HTTP::redirect "$maint_prefix/index.html"
}
} 
hoolioCirrostratus
Hi Nit,
In 10.x, referencing the datagroup using $::datagroup_name will just return the datagroup name--not the contents. So you can change the [lindex $::datagroup_name 0] commands to:
[class element -value 0 datagroup_name]
Also, I'd suggest upgrading to 10.2.1 once it's released as it contains a lot of fixes and enhancements over 10.0.1.
Aaron- Nit_67494
Hi Aaron,
It's still not working, now the web page is just empty and I have done the Maintenange Page Lite http://devcentral.f5.com/wiki/defau...eLite.html but looks like it will still send the maintenance page even if the pool_member is up (>1)
Any advice?
Thanks
