【发布时间】：2016-10-18 14:35:26
【问题描述】：
我们正在尝试向我们的服务引入 F5 负载均衡器，为此，我们正在开发一个 iRule，它使用通用持久性功能来持久化会话。
但是当尝试使用 iRule 命令“persist uie”保持会话时，我们遇到了延迟。
延迟可能超过 1000 毫秒...
似乎是什么问题？我们怎样才能摆脱这种延迟？
请查看我们的 iRule 代码和我们记录的日志。
提前致谢
这是我们的 iRule 代码：
when HTTP_REQUEST {
if {[HTTP::host] equals "mpi-lb.creditguard.co.il" } {
set txID1 ""
set txID2 ""
set txID3 ""
set txID4 ""
set txID5 ""
set txID6 ""
set txID7 ""
set txID8 ""
# Log details for the request
regexp {(txId|token|mpiTransactionId|transactionID)[=>]([0-9a-z]{8}-([0-9a-z]{4}-){3}[0-9a-z]{12})([&< ]|$)} [HTTP::uri] => txID1 txID2 txID3 txID4
regexp {(txId|token|mpiTransactionId|transactionID)[=>]([0-9a-z]{8}-([0-9a-z]{4}-){3}[0-9a-z]{12})([&< ]|$)} [HTTP::payload] => txID5 txID6 txID7 txID8
log local0. "uri:[HTTP::uri]:payload: txID2:$txID2 txID6:$txID6"
if {$txID2 != ""} {
log local0. "persist lookup uie:[persist lookup uie $txID2] $txID2 in uri"
persist uie $txID2
} elseif {$txID6 != ""} {
log local0. "persist lookup uie:[persist lookup uie $txID6] $txID6 in paylod"
persist uie $txID6
}
}
}
when HTTP_RESPONSE {
if {([IP::server_addr] equals "172.16.100.16") || ([IP::server_addr] equals "172.16.100.17") } {
# Trigger collection for up to 1MB of data
if {[HTTP::header exists "Content-Length"] && [HTTP::header "Content-Length"] <= 1048576} {
set content_length [HTTP::header "Content-Length"]
} else {
set content_length 1048576
}
# Check if $content_length is not set to 0
if { ([HTTP::status] == 200) && ($content_length > 0)} {
HTTP::collect $content_length
}
}
}
when HTTP_RESPONSE_DATA {
if {([IP::server_addr] equals "172.16.100.16") || ([IP::server_addr] equals "172.16.100.17") } {
# do stuff with the payload
#find the application unique identifier between <uid> and </uid> (5 is the length of <uid> string)
set txId [string trim [findstr [HTTP::payload] "<txId>" 5 "</txId>"] ">"]
if {$txId != ""} {
log local0. "[IP::server_addr] : persist add uie #$txId#"
persist add uie $txId 1800
}
}
}
这里是日志（您可以看到 14:16:08 和 14:17:08 之间的延迟）
Tue Jun 14 14:16:03 IDT 2016 info cgwaf tmm3[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: uri://CGMPI_Server/CreateTransactionExtended:payload: txID2: txID6:
Tue Jun 14 14:16:04 IDT 2016 info cgwaf tmm3[10326] Rule /Common/mpi-lb-irule <HTTP_RESPONSE_DATA>: 172.16.100.16 : persist add uie #03f72209-754e-4bde-85f6-69cdf4d27526#
Tue Jun 14 14:16:08 IDT 2016 info cgwaf tmm1[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: uri://CGMPI_Server/PerformTransaction? txId=03f72209-754e-4bde-85f6-69cdf4d27526:payload: txID2:03f72209-754e-4bde-85f6-69cdf4d27526 txID6:
Tue Jun 14 14:16:08 IDT 2016 info cgwaf tmm1[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: persist lookup uie:/Common/mpi-lb 172.16.100.16 443 03f72209-754e-4bde-85f6-69cdf4d27526 in uri
Tue Jun 14 14:17:08 IDT 2016 info cgwaf tmm2[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: uri://CGMPI_Server/merchantPages/ResponsiveWebSources/images/cvv.jpg:payload: txID2: txID6:
Tue Jun 14 14:17:08 IDT 2016 info cgwaf tmm[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: uri://CGMPI_Server/merchantPages/ResponsiveWebSources/images/mastercard_slice.gif:payload: txID2: txID6:
Tue Jun 14 14:17:08 IDT 2016 info cgwaf tmm[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: uri://CGMPI_Server/merchantPages/ResponsiveWebSources/images/pci_slice.gif:payload: txID2: txID6:
Tue Jun 14 14:17:08 IDT 2016 info cgwaf tmm[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: uri://CGMPI_Server/merchantPages/ResponsiveWebSources/images/visa_slice.gif:payload: txID2: txID6:
Tue Jun 14 14:17:08 IDT 2016 info cgwaf tmm[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: uri://CGMPI_Server/merchantPages/ResponsiveWebSources/images/Logo.gif:payload: txID2: txID6:
Tue Jun 14 14:17:08 IDT 2016 info cgwaf tmm3[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: uri://CGMPI_Server/merchantPages/ResponsiveWebSources/images/qm.png:payload: txID2: txID6:
Tue Jun 14 14:18:06 IDT 2016 info cgwaf tmm2[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: uri://CGMPI_Server/ProcessCreditCard:payload: txID2: txID6:03f72209-754e-4bde-85f6-69cdf4d27526
Tue Jun 14 14:18:06 IDT 2016 info cgwaf tmm2[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: persist lookup uie:/Common/mpi-lb 172.16.100.16 443 03f72209-754e-4bde-85f6-69cdf4d27526 in paylod
Tue Jun 14 14:18:07 IDT 2016 info cgwaf tmm2[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: uri:/CGMPI_Server/merchantPages/nlb/OK.jsp?uniqueID=697536646.622257&lang=EN&authNumber=9125242& responseMac=7e77d7fe857e707ddf1c8990c80da8373f716c79d0ee79b88 f3d898a9ff0afc0&cardToken=1051484189394580& cardExp=0217&personalId=88888888& cardMask=458045******4580& txId=03f72209-754e-4bde-85f6-69cdf4d27526& numberOfPayments=&firstPayment=&periodicalPayment=:payload: txID2:03f72209-754e-4bde-85f6-69cdf4d27526 txID6:
Tue Jun 14 14:18:07 IDT 2016 info cgwaf tmm2[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: persist lookup uie:/Common/mpi-lb 172.16.100.16 443 03f72209-754e-4bde-85f6-69cdf4d27526 in uri
Tue Jun 14 14:18:07 IDT 2016 info cgwaf tmm2[10326] Rule /Common/mpi-lb-irule <HTTP_REQUEST>: uri:/CGMPI_Server/merchantPages/WebSources/images/ssl.png:payload: txID2: txID6:
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