Can one mlapi server provide service to multiple zone minder event servers

Discussion topics related to mobile applications and ZoneMinder Event Server (including machine learning)
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wgs
Posts: 4
Joined: Wed Feb 06, 2019 5:16 pm

Can one mlapi server provide service to multiple zone minder event servers

Post by wgs » Wed Oct 13, 2021 2:58 pm

Hi,
I am running the dlandon zm/es server at two locations and have successfully built a standalone mlapi server. I have the first zm instance working with the mlapi server, but am trying to get the second to work. In the secrets file on the mlapi instance I had to provide the portal address for the first instance. When api calls come from the second instance, it is trying to pull the event images from the 1st server. Is there a way to serve both servers from one mlapi instance? I could spin up a second mlapi instance, but that would use twice the memory.
Thanks,
Bill

tsp84
Posts: 126
Joined: Thu Dec 24, 2020 4:04 am

Re: Can one mlapi server provide service to multiple zone minder event servers

Post by tsp84 » Wed Oct 13, 2021 8:04 pm

Not in its current implementation, however I have forked and am rewriting alot of zmes, pyzm, and mlapi. I could add support for this in my forked version, it might be a week or more depending on how much time I have.


I am releasing my forked components soon for general public beta testing. Would you be interested in testing this type of functionality?

tsp84
Posts: 126
Joined: Thu Dec 24, 2020 4:04 am

Re: Can one mlapi server provide service to multiple zone minder event servers

Post by tsp84 » Wed Oct 13, 2021 8:07 pm

Thinking of it, it shouldn't be that hard. Just have zmes send the url and credentials (hashed with a salt known by both) with the request to mlapi.

Currently you configure mlapi to talk to a certain zmes host but if the zmes request contains the reply url and credentials mlapi could use that to hit the zmes host APIs.

This might be really easy to implement.

tsp84
Posts: 126
Joined: Thu Dec 24, 2020 4:04 am

Re: Can one mlapi server provide service to multiple zone minder event servers

Post by tsp84 » Wed Oct 13, 2021 8:39 pm

Here is some log output from some initial testing. This shouldnt take me long to implement, just need to get it tested as I dont run 2 zm hosts.

Code: Select all

10/13/21 14:36:46.948451 zm_mlapi[42669] DBG1 mlapi:164 [TEST!!! -> ZMES has requested a detection with a reply addre
  ss of 'https://zm.<redacted>.com/zm/api']
  10/13/21 14:36:46.950233 zm_mlapi[42669] DBG1 mlapi:165 [TEST!!! -> ZMES API has supplied these credentials to reply
  with -> token=eyJ0eXA<redacted>....]
And here is some log output after adding pre defined key encryption (this will add 1 more dependancy, 'cryptography' package)->

Code: Select all

10/13/21 16:06:15.149993 zm_mlapi[44282] DBG1 mlapi:172 [TEST!!! -> ZMES has requested a detection with a reply addre
  ss of 'https://zm.<redacted>.com/zm/api']
  10/13/21 16:06:15.151978 zm_mlapi[44282] DBG1 mlapi:173 [TEST!!! -> ZMES API has supplied these ENCRYPTED credentials
   to reply with -> gAAAAABhZ1hX-_sBd8HBvo1cJNIae2q-0VYHonT6kLrIUlQ4r0ZZjC4YFyChKbjuHViBoKH6KBP7v7htlW74236Idr3aCLH5ynK
  VZmul6Lv2uTuDtiO1eOhdn8xn98BCasujnWvKpN7PPmLjCsriRWig6kKWnBFDqZCU8YFbR-KoT9BxNr5VXmz0x4avoClGUatSkrfCEACA8NFBN-PRiPEM
  PWzI-g4f-Barf2El_rO_dNXSR8vBwa0EvvLGZfNZYMF8mmREhixtJaazuoW7NF8DQT2wiDkkgL9g4LV6yt1Zzp2S1IKxUWMeeJLH1admXux2xX2iumyN8
  VOg4AaLBPIXuatMpnVDkA==]
  10/13/21 16:06:15.153841 zm_mlapi[44282] DBG1 mlapi:175 [decrypted=b'token=eyJ0eX<redacted>']
Just need to polish it and bug test it out. Not a huge change to the code base and actually this way is a whole lot better I would say. Makes mlapi more dynamic!

Almost there! I have succesfully modified the codebase to use this system and also still use comply with legacy requests. Benchmarking so far shows on par to negligable difference in speed, and it will only get faster as I keep optimizing.

Code: Select all

10/14/21 02:01:29.53893 zm_mlapi[56113] DBG1 mlapi:165 [mlapi: ZMES sent encrypted data! Checking the keystore for 'd
  efault route']
  10/14/21 02:01:29.577527 zm_mlapi[56113] DBG1 mlapi:180 [decrypted={'auth_type': 'token', 'api_url': 'https://zm.<redacted>.com/zm/api', 'portal_url': 'https://zm.<redacted>.com/zm', 'user': 'some dude', 'pass': 'some crazy long string'}]

wgs
Posts: 4
Joined: Wed Feb 06, 2019 5:16 pm

Re: Can one mlapi server provide service to multiple zone minder event servers

Post by wgs » Thu Oct 14, 2021 10:52 am

This looks very promising! Thanks! If you need me to test anything on my end I'd be happy to.

tsp84
Posts: 126
Joined: Thu Dec 24, 2020 4:04 am

Re: Can one mlapi server provide service to multiple zone minder event servers

Post by tsp84 » Thu Oct 21, 2021 5:52 pm

Check out the neo-ZMES Public beta post. The functionality you want is built in as the default mechanism for mlapi AUTH. Use it, break it, report it so I can fix things please ;).

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