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From Adi Mallikarjuna Reddy V <adimallikarjunare...@gmail.com>
Subject Re: remap rules based on request header
Date Mon, 08 May 2017 16:18:37 GMT
remap rule

map /random_path http://dummy_destination.com/ @pristine_host_hdr=1
@plugin=libtslua.so @pparam=lua_remap.lua


script - lua_remap.lua


function do_remap()

    ts.client_request.set_url_host('actual_destination.com')

    ts.client_request.set_url_port(80)

    ts.client_request.set_url_scheme('http')

    return TS_LUA_REMAP_DID_REMAP

end

No extra info with debug tag ts_lua enabled, as this seems to be failing to
parse the remap config itself.


Thanks

Adi

On Mon, May 8, 2017 at 9:13 AM, Jeremy Payne <jp557198@gmail.com> wrote:

> verify your remap rules and/or lua scripts to ensure they are
> syntactically correct.
>
> also enable debug.. .may provide further insight..
>
> can you also share your remap file and corresponding lua scripts ?
>
>
>
>
> On Mon, May 8, 2017 at 11:00 AM, Adi Mallikarjuna Reddy V <
> adimallikarjunareddy@gmail.com> wrote:
>
>> After adding lua plugin with remap rule in remap.config and writing some
>> sample code mentioned in https://docs.trafficserver.
>> apache.org/en/latest/admin-guide/plugins/ts_lua.en.html#ts-
>> client-request-set-url-host I see the following error in traffic server.
>>
>>
>> [May  8 08:57:44.851] Server {0x2aeb0862c2c0} WARNING: Failed to create
>> new instance for plugin libtslua.so (not a TS_SUCCESS return)
>>
>> [May  8 08:57:44.851] Server {0x2aeb0862c2c0} WARNING: Could not add rule
>> at line #25; Aborting!
>>
>> [May  8 08:57:44.851] Server {0x2aeb0862c2c0} WARNING: [ReverseProxy]
>> Can't create new remap instance for plugin "libtslua.so" -
>> [TSRemapNewInstance] ts_lua_add_module failed at line 25
>>
>> [May  8 08:57:44.852] Server {0x2aeb0862c2c0} WARNING: something failed
>> during BuildTable() -- check your remap plugins!
>>
>> [May  8 08:57:44.852] Server {0x2aeb0862c2c0} WARNING: Can not load the
>> remap table, exiting out!
>>
>>
>> Is there any thing that I am missing out?
>>
>>
>> Thanks
>>
>> Adi
>>
>>
>>
>> On Sun, Feb 5, 2017 at 11:39 PM, Shu Kit Chan <chanshukit@gmail.com>
>> wrote:
>>
>>> No, you don't need lua runtime on your host. Just compile the
>>> experimental plugin and that's it. More information here -
>>> https://docs.trafficserver.apache.org/en/latest/admin-guide/
>>> plugins/ts_lua.en.html
>>>
>>> Thanks.
>>>
>>> On Wed, Jan 25, 2017 at 5:10 PM, Adi Mallikarjuna Reddy V
>>> <adimallikarjunareddy@gmail.com> wrote:
>>> > For this to work, do I have to install Lua runtime on my host?
>>> >
>>> > On Wed, Jan 25, 2017 at 10:49 AM, Jeremy Payne <jp557198@gmail.com>
>>> wrote:
>>> >>
>>> >> i use the lua plugin to change origin host based on certain
>>> conditions.
>>> >>
>>> >>
>>> >> https://docs.trafficserver.apache.org/en/latest/admin-guide/
>>> plugins/ts_lua.en.html#ts-client-request-set-url-host
>>> >>
>>> >> On Wed, Jan 25, 2017 at 12:33 PM, Adi Mallikarjuna Reddy V
>>> >> <adimallikarjunareddy@gmail.com> wrote:
>>> >>>
>>> >>> any help with this is greatly appreciated. Is there a debug flag
to
>>> check
>>> >>> header rewrite functionality?
>>> >>>
>>> >>> On Tue, Jan 24, 2017 at 1:42 PM, Adi Mallikarjuna Reddy V
>>> >>> <adimallikarjunareddy@gmail.com> wrote:
>>> >>>>
>>> >>>> Thanks Sudheer for the pointer. I tried the following and it
looks
>>> like
>>> >>>> this condition is not working
>>> >>>>
>>> >>>> cond %{READ_REQUEST_HDR_HOOK}
>>> >>>>
>>> >>>> cond %{CLIENT-HEADER:DEVHOST} = dev103
>>> >>>>
>>> >>>> set-destination HOST dev103.abc.com [L]
>>> >>>>
>>> >>>>
>>> >>>>
>>> >>>> and
>>> >>>>
>>> >>>> curl -H 'DEVHOST:dev103' 'http://actual_ats_endpoint/path' -v
>>> doesnt
>>> >>>> take to that host specified.
>>> >>>>
>>> >>>>
>>> >>>>
>>> >>>> Thanks
>>> >>>>
>>> >>>> Adi
>>> >>>>
>>> >>>>
>>> >>>>
>>> >>>> On Tue, Jan 24, 2017 at 12:28 PM, Sudheer Vinukonda
>>> >>>> <sudheervinukonda@yahoo.com> wrote:
>>> >>>>>
>>> >>>>> You'd need to specify a preremap request hook (such as Read
Request
>>> >>>>> Header) in your rules. I think the default hook is Send
Response
>>> Header.
>>> >>>>>
>>> >>>>> - Sudheer
>>> >>>>>
>>> >>>>> On Jan 24, 2017, at 12:24 PM, Adi Mallikarjuna Reddy V
>>> >>>>> <adimallikarjunareddy@gmail.com> wrote:
>>> >>>>>
>>> >>>>> Ok, I tried the following one with no luck. The requests
are always
>>> >>>>> going to the new host without the customer header value
also.
>>> >>>>>
>>> >>>>> cond %{HEADER:DEV_HOST} = "dev102"
>>> >>>>> set-destination HOST dev102.abc.com [L]
>>> >>>>>
>>> >>>>>
>>> >>>>> my remap rule is
>>> >>>>>
>>> >>>>> map / http://abc.com/ @pristine_host_hdr=1
>>> @plugin=header_rewrite.so
>>> >>>>> @pparam=my_header_rules.conf
>>> >>>>>
>>> >>>>>
>>> >>>>> Am I missing anything important here?
>>> >>>>>
>>> >>>>>
>>> >>>>> Thanks
>>> >>>>>
>>> >>>>> Adi
>>> >>>>>
>>> >>>>>
>>> >>>>> On Tue, Jan 24, 2017 at 11:46 AM, Jeremy Payne <jp557198@gmail.com
>>> >
>>> >>>>> wrote:
>>> >>>>>>
>>> >>>>>> the lua plugin also has this functionality although
may be
>>> somewhat
>>> >>>>>> overkill for your needs.
>>> >>>>>>
>>> >>>>>>
>>> >>>>>> On Tue, Jan 24, 2017 at 1:43 PM, Adi Mallikarjuna Reddy
V
>>> >>>>>> <adimallikarjunareddy@gmail.com> wrote:
>>> >>>>>>>
>>> >>>>>>> So to achieve my use case, can I try something like
this?
>>> >>>>>>>
>>> >>>>>>> map / http://b.bar.com @plugin=header_rewrite.so
>>> @pparam=rules1.conf
>>> >>>>>>>
>>> >>>>>>> and my rules1.conf has
>>> >>>>>>>
>>> >>>>>>> cond %{HEADER:MY_HEADER} = "foo"
>>> >>>>>>> set-destination HOST mobile.bar.com [L]
>>> >>>>>>>
>>> >>>>>>> This should forward the request to mobile.bar.com
if the
>>> request has
>>> >>>>>>> 'MY_HEADER' with value 'foo'.
>>> >>>>>>>
>>> >>>>>>>
>>> >>>>>>> Thanks
>>> >>>>>>>
>>> >>>>>>> Adi
>>> >>>>>>>
>>> >>>>>>>
>>> >>>>>>>
>>> >>>>>>> On Tue, Jan 24, 2017 at 11:36 AM, Brian Geffon
>>> >>>>>>> <briangeffon@gmail.com> wrote:
>>> >>>>>>>>
>>> >>>>>>>> Sorry I think I meant header_rewrite.
>>> >>>>>>>>
>>> >>>>>>>> Brian
>>> >>>>>>>>
>>> >>>>>>>>
>>> >>>>>>>> On Tue, Jan 24, 2017, 11:26 Brian Geffon <briangeffon@gmail.com
>>> >
>>> >>>>>>>> wrote:
>>> >>>>>>>>>
>>> >>>>>>>>> There is a regex_remap plugin that is what
you would want,
>>> take a
>>> >>>>>>>>> look in plugins/
>>> >>>>>>>>>
>>> >>>>>>>>> Brian
>>> >>>>>>>>>
>>> >>>>>>>>>
>>> >>>>>>>>> On Tue, Jan 24, 2017, 11:25 Adi Mallikarjuna
Reddy V
>>> >>>>>>>>> <adimallikarjunareddy@gmail.com> wrote:
>>> >>>>>>>>>>
>>> >>>>>>>>>> Is there a config that allows to change
remap rule based on
>>> the
>>> >>>>>>>>>> incoming header?
>>> >>>>>>>>>>
>>> >>>>>>>>>>
>>> >>>>>>>>>> My use case is , if I send a custom
header in the request, the
>>> >>>>>>>>>> remap rule should be changed to different
one than the
>>> default one
>>> >>>>>>>>>> configured.
>>> >>>>>>>>>>
>>> >>>>>>>>>>
>>> >>>>>>>>>> Thanks
>>> >>>>>>>>>>
>>> >>>>>>>>>> Adi
>>> >>>>>>>
>>> >>>>>>>
>>> >>>>>>
>>> >>>>>
>>> >>>>
>>> >>>
>>> >>
>>> >
>>>
>>
>>
>

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