Overview

DBCA Django utility classes and functions.

Requirements

• Python 3.12 or later
• Django 5.2 or later

Development

Dependencies for this project are managed using uv. With uv installed, change into the project directory and run:

uv sync

Activate the virtualenv like so:

source .venv/bin/activate

Run unit tests using pytest (or tox, to test against multiple Python versions):

pytest -sv
tox -v

Releases

Tagged releases are built and pushed to PyPI automatically using a GitHub workflow in the project. Update the project version in pyproject.toml and tag the required commit with the same value to trigger a release. Packages can also be built and uploaded manually to PyPI using uv, if required:

uv build
uv publish

Installation

1. Install via uv/pip/etc.: pip install dbca-utils

SSO Login Middleware

This will automatically login and create users using headers from an upstream proxy (REMOTE_USER and some others). The logout view will redirect to a separate logout page which clears the SSO session.

Usage

Add dbca_utils.middleware.SSOLoginMiddleware to settings.MIDDLEWARE (after both of django.contrib.sessions.middleware.SessionMiddleware and django.contrib.auth.middleware.AuthenticationMiddleware. Ensure that AUTHENTICATION_BACKENDS contains django.contrib.auth.backends.ModelBackend, as this middleware depends on it for retrieving the logged in user for a session. Note that the middleware will still work without it, but will reauthenticate the session on every request, and request.user.is_authenticated won't work properly/will be false.

Example:

MIDDLEWARE = [
    ...,
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'dbca_utils.middleware.SSOLoginMiddleware'
    ...,
]

Audit model mixin

AuditMixin is an extension of Django.db.model.Model that adds a number of additional fields:

• creator - FK to AUTH_USER_MODEL, used to record the object creator
• modifier - FK to AUTH_USER_MODEL, used to record who the object was last modified by
• created - a timestamp that is set on initial object save
• modified - an auto-updating timestamp (on each object save)

Healthcheck feature

Requirements

• Django 5.2 or later
• Declared the default cache and also the cache is shared by all pod instances

Usage

• Install the app 'dbca_utils' in INSTALLED_APPS

• Service Configuration

  • HEALTHCHECK_CACHE: Optional. the django cache to save healthcheck realted data. default is 'default'; if cache doesn't exist, healthcheck feature will be disabled.
  • HEALTHCHECK_ENABLED: Optional. enable/disable the healthcheck service. default is 'true'
  • CACHE_PREFIX: Optional. used as the prefix of the cache key. default is ''
  • PORT: Optional. The listening port of the web application. default is '8080', used to send request to peer pod instance to get the resouces usage of the peer pod instance.
  • WORKLOADS: Optional. Used if the web app has a fixed replicas.
  • WORKLOAD_DEPLOYMENT: Optional. the workload is deployment if it is true; otherwise it is statefulset. default is 'true'
  • WORKLOAD_FAILED_THRESHOLD: Optional. The number of continuous failed times to decide that a pod is offline.
  • WORKLOAD_VOLUMES: Optional. can be 'disabled', 'false','automatic' or "," separated volume mounted point. default is "automatic". Blob storage is not supported.
    • disabled|false: Don't harvest volume usage data
    • automatic: Detect the persistent volume automatically.
    • "," separated volume mounted points: the volume list
  • HEALTHCHECK_SYSTEMDATA_ENABLED: Enable system resource data
  • HEALTHCHECK_PROCESSDATA_ENABLED: Enable process resource data

• Endpoints added by this app

  • /healthcheck/healthdata: An endpoint for client to harvest the resources usage data. This endpoint should be cofigured to use basic auth in nginx reverse proxy.
  • /workload/healthcheck/healthdata: An internal endpoint used to get the resource usage of the peer pod instance. This endpoing should not be exposed in nginx reverse proxy.

• Nginx Configuration.

  • Add a location 'location /healthcheck/' and configure it to use basic auth in nginx.

• Access the url : https://xxx.dbca.wa.gov.au/healthcheck/healthdata to get the health json data

• The sample data of the health data:

    {
     "workload0":{
        "resources":{
           "start_time":"2026-07-24T06:10:23",
           "cpu_total":0.0,
           "cpu_min":0.0,
           "cpu_max":0.0,
           "pmemory_total":292.28125,
           "pmemory_min":95.53515625,
           "pmemory_max":100.828125,
           "vmemory_total":764.12890625,
           "vmemory_min":207.8671875,
           "vmemory_max":278.59765625,
           "processes":3,
           "process":{
              "start_time":"2026-07-24T06:10:23",
              "cpu_num":0,
              "cpu_pcent":0.0,
              "pmemory":100.828125,
              "vmemory":207.8671875,
              "children":[
                 {
                    "start_time":"2026-07-24T06:10:24",
                    "cpu_num":1,
                    "cpu_pcent":0.0,
                    "pmemory":95.53515625,
                    "vmemory":277.6640625
                 },
                 {
                    "start_time":"2026-07-24T06:10:24",
                    "cpu_num":3,
                    "cpu_pcent":0.0,
                    "pmemory":95.91796875,
                    "vmemory":278.59765625,
                    "currentprocess":true
                 }
              ]
           }
        },
        "system":{
           "cpu_pcent":0.0,
           "cpucores_pcent":[
              0.0,
              0.0,
              0.0,
              0.0
           ],
           "memory_total":31.279705047607422,
           "memory_used":12.220211029052734,
           "memory_pcent":39.06753919339612,
           "bytes_sent":9028205,
           "bytes_recv":9246094
        },
        "volumes":{
           "/app/captcha":{
              "size":1024,
              "used":0,
              "pcent":0.006103515625,
              "unit":"M"
           }
        },
        "hostname":"auth2-uat11-5b495b67cb-z8vwj"
     },
     "workload1":{
        "resources":{
           "start_time":"2026-07-24T06:11:45",
           "cpu_total":0.0,
           "cpu_min":0.0,
           "cpu_max":0.0,
           "pmemory_total":292.02734375,
           "pmemory_min":95.4140625,
           "pmemory_max":100.6171875,
           "vmemory_total":763.84375,
           "vmemory_min":207.8359375,
           "vmemory_max":278.546875,
           "processes":3,
           "process":{
              "start_time":"2026-07-24T06:11:45",
              "cpu_num":1,
              "cpu_pcent":0.0,
              "pmemory":100.6171875,
              "vmemory":207.8359375,
              "children":[
                 {
                    "start_time":"2026-07-24T06:11:46",
                    "cpu_num":2,
                    "cpu_pcent":0.0,
                    "pmemory":95.4140625,
                    "vmemory":277.4609375
                 },
                 {
                    "start_time":"2026-07-24T06:11:46",
                    "cpu_num":3,
                    "cpu_pcent":0.0,
                    "pmemory":95.99609375,
                    "vmemory":278.546875,
                 }
              ]
           }
        },
        "system":{
           "cpu_pcent":13.1,
           "cpucores_pcent":[
              15.4,
              12.2,
              12.0,
              12.7
           ],
           "memory_total":31.279705047607422,
           "memory_used":12.220211029052734,
           "memory_pcent":39.06753919339612,
           "bytes_sent":9099207,
           "bytes_recv":9055029
        },
        "volumes":{
           "/app/captcha":{
              "size":1024,
              "used":0,
              "pcent":0.006103515625,
              "unit":"M"
           }
        },
        "hostname":"auth2-uat11-5b495b67cb-dpdjp"
     },
     "summary":{
        "cpu_total":0.0,
        "cpu_min":0.0,
        "cpu_max":0.0,
        "process_cpu_min":0.0,
        "process_cpu_max":0.0,
        "pmemory_total":584.30859375,
        "pmemory_min":292.02734375,
        "pmemory_max":292.28125,
        "process_pmemory_min":95.4140625,
        "process_pmemory_max":100.828125,
        "vmemory_total":1527.97265625,
        "vmemory_min":763.84375,
        "vmemory_max":764.12890625,
        "process_vmemory_min":207.8359375,
        "process_vmemory_max":278.59765625,
        "processes_total":6,
        "workloads_running":2,
        "workloads_failed":0
     }
  }