Hello Alex
Thanks for the reply
what happens is - we provide an interface for the admin to set whether forward proxy is enabled or not - and also specify which all peers need to be involved in the squid chaining ( parent child ). If I have say 4 machines - A,B,C and D. Admin can decide machine A and B are the child and machine C and D as parents. Both A and B can use C and D as parents - for load balancing and redundancy.
A -> parent -> C
A -> parent -> D
B -> parent -> C
B -> parent -> D
In the UI interface admin will specify this. When it is done, in the back end I will create a tunnel and reconfigure squid config file and start squid. Now in the UI I need to specify whether every thing is perfect and A and B can talk to C and D seamlessly - or the traffic is perfect or not. Only if the traffic between squid A and squid C and squid D are perfect, I should mention that it is ACTIVE. For this I thought if have some mechanism in both sides to do ping kind of functionality, it would be good.
What I found is squid client can be used for ping to other end. In the A server I can use tunnel as the ping destination and C server I can directly ping A. If this is through I guess set the channel as ACTIVE. another option is as Eliezer mentioned, I can use simple curl to verify this connectivity
Thanks and regards
~S
On 3 February 2017 at 03:26, Alex Rousskov <rousskov@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
On 02/01/2017 12:06 AM, salil GK wrote:
> I need to know whether the connectivity is through from squid
> child to squid parent.
...
> I need to know in both machines that the squid channel is active.
...
> if the heartbeat is exchanged successfully !!
It is not clear what you mean by "connectivity is through", "channel is
active", and "heartbeat is exchanged". You may want to describe what you
need in higher-level terms specific to your problem domain.
Please note that Squid peers do not normally exchange HTTP messages
unless there is a client request to be forwarded. There are various
optional features (e.g., cache_peer standby=N) that may create peer
traffic in the absence of requests, but it is not yet clear whether any
of those features are applicable to your use case.
If you just want to know whether there is at least one TCP connection
between two Squid instances, then you can use netstat or a similar tool
to find all connections to/from relevant addresses (and their state).
If you want to monitor the current peer state, I believe there is a
cache manager page for that, but that will only give you information
about one Squid's opinion, not both.
Alex.
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