Communication problem between frontend and backend in K8S Clúster

[ivanfr90]

Hi.

We are experiencing a issue in a deployment on a K8S clúster following the guide SC4NSMP-GUI

The pods are running fine without problems, but after access to the application through the browser, after a few seconds, a communication issue is displayed in the screen:

Also it's impossible to save any configuration, no action appears to have effect through the GUI.

The SC4SNMP GUI it's deployed in a K8S Clúster:

There're not detected issues:

Logs ui-backend-deployment:

Defaulted container "ui-backend" out of: ui-backend, patch-log-dirs (init)
[2024-09-16 07:42:24 +0000] [7] [INFO] Starting gunicorn 22.0.0
[2024-09-16 07:42:24 +0000] [7] [INFO] Listening at: http://0.0.0.0:5000 (7)
[2024-09-16 07:42:24 +0000] [7] [INFO] Using worker: sync
[2024-09-16 07:42:24 +0000] [8] [INFO] Booting worker with pid: 8

Logs ui-backend-worker-deployment:

 -------------- celery@ui-backend-worker-deployment-58cb744585-8hx94 v5.2.7 (dawn-chorus)
--- ***** -----
-- ******* ---- Linux-4.18.0-553.16.1.el8_10.x86_64-x86_64-with-glibc2.36 2024-09-16 07:42:16
- *** --- * ---
- ** ---------- [config]
- ** ---------- .> app:         SC4SNMP_UI_backend:0x7f19d47a05e0
- ** ---------- .> transport:   redis://snmp-redis-headless:6379/2
- ** ---------- .> results:     disabled://
- *** --- * --- .> concurrency: 2 (prefork)
-- ******* ---- .> task events: OFF (enable -E to monitor tasks in this worker)
--- ***** -----
 -------------- [queues]
                .> apply_changes    exchange=apply_changes(direct) key=apply_changes


[tasks]
  . SC4SNMP_UI_backend.apply_changes.tasks.run_job

[2024-09-16 07:42:17,556: INFO/MainProcess] Connected to redis://snmp-redis-headless:6379/2
[2024-09-16 07:42:17,720: INFO/MainProcess] mingle: searching for neighbors
[2024-09-16 07:42:18,821: INFO/MainProcess] mingle: sync with 1 nodes
[2024-09-16 07:42:18,821: INFO/MainProcess] mingle: sync complete
[2024-09-16 07:42:18,852: INFO/MainProcess] celery@ui-backend-worker-deployment-58cb744585-8hx94 ready.
[2024-09-16 07:42:48,844: INFO/MainProcess] missed heartbeat from celery@ui-backend-worker-deployment-5cc48f5c54-mm4jp

Logs ui-frontend-deployment:

yarn run v1.22.19
$ webpack-dev-server --config demo/webpack.standalone.config.js --port ${DEMO_PORT-8080} --host 0.0.0.0
<i> [webpack-dev-server] Project is running at:
<i> [webpack-dev-server] Loopback: http://localhost:30001/
<i> [webpack-dev-server] On Your Network (IPv4): http://10.4.4.4:30001/
<i> [webpack-dev-server] Content not from webpack is served from '/frontend/packages/manager/public' directory
(node:28) [DEP_WEBPACK_COMPILATION_ASSETS] DeprecationWarning: Compilation.assets will be frozen in future, all modifications are deprecated.
BREAKING CHANGE: No more changes should happen to Compilation.assets after sealing the Compilation.
        Do changes to assets earlier, e. g. in Compilation.hooks.processAssets.
        Make sure to select an appropriate stage from Compilation.PROCESS_ASSETS_STAGE_*.
(Use `node --trace-deprecation ...` to show where the warning was created)
assets by path *.otf 370 KiB
  asset 62d4d7d369292a9bf23762465ec6d704.otf 94.4 KiB [emitted] (auxiliary name: main)
  asset b4f9eb8ce027016ab9b9860817451d07.otf 93.7 KiB [emitted] (auxiliary name: main)
  asset 410504d49238e955ba7dc23a7f963021.otf 92.4 KiB [emitted] (auxiliary name: main)
  asset 6a386899746222073dd64c5f74d1a69d.otf 89.8 KiB [emitted] (auxiliary name: main)
asset main.js?7eac4df873559deeb723 12.4 MiB [emitted] [immutable] (name: main)
asset index.html 427 bytes [emitted]
runtime modules 27.5 KiB 14 modules
orphan modules 681 bytes [orphan] 1 module
modules by path ../../node_modules/ 4.07 MiB 550 modules
modules by path ./ 277 KiB
  modules by path ./src/ 249 KiB 43 modules
  modules by path ./node_modules/qs/lib/*.js 26.2 KiB
    ./node_modules/qs/lib/index.js 211 bytes [built] [code generated]
    ./node_modules/qs/lib/stringify.js 9.72 KiB [built] [code generated]
    ./node_modules/qs/lib/formats.js 476 bytes [built] [code generated]
    ./node_modules/qs/lib/parse.js 9.18 KiB [built] [code generated]
    ./node_modules/qs/lib/utils.js 6.66 KiB [built] [code generated]
  ./demo/demo.jsx 1.14 KiB [built] [code generated]
  ./util.inspect (ignored) 15 bytes [built] [code generated]
webpack 5.87.0 compiled successfully in 10136 ms
assets by status 370 KiB [cached] 4 assets
assets by status 12.4 MiB [emitted]
  assets by path *.js 12.4 MiB
    asset main.js?c25e383efe5ec4ddbffa 12.4 MiB [emitted] [immutable] (name: main)
    asset main.6c418420d48e2d666e73.hot-update.js 851 bytes [emitted] [immutable] [hmr] (name: main)
  asset index.html 427 bytes [emitted]
  asset main.6c418420d48e2d666e73.hot-update.json 28 bytes [emitted] [immutable] [hmr]
Entrypoint main 12.4 MiB (370 KiB) = main.js?c25e383efe5ec4ddbffa 12.4 MiB main.6c418420d48e2d666e73.hot-update.js 851 bytes 4 auxiliary assets
cached modules 4.34 MiB [cached] 601 modules
runtime modules 27.5 KiB 14 modules
webpack 5.87.0 compiled successfully in 279 ms