Development Environment

How to set up a development environment

Introduction

In this section it is explained how to set up a development environment:

  • As described in Architecture, we would need to have the Kiali dependencies running in an OpenShift or Kubernetes
  • We will use a port forward to access those services outside the cluster.
  • We will have the project source running locally. In this case we will set up an IDE.
  • Bookinfo application example will also be running on our cluster.

development_environment

Prerrequisites

  • Development tools are installed:
  • Kiali source code: We will fork the 3 kiali repositories, and then, clone them in a local folder:
  • Istio and the required services are running in Minikube or OpenShift. To install it following the above schema, it is possible to use the following scripts (From the Kiali repository):
    • hack/istio/install-istio-via-istioctl.sh: Installs the latest Istio release into istio-system namespace along with the Prometheus, Grafana, and Jaeger addons.
    • hack/istio/install-bookinfo-demo.sh: Installs the Bookinfo demo that is found in the Istio release that was installed via the hack/istio/install-istio-via-istioctl.sh hack script.
      • Pass in -tg to also install a traffic generator that will send messages periodically into the Bookinfo demo.
      • If using Minikube and the -tg option, make sure you pass in the Minikube profile name via -mp if the profile name is not minikube.

Port forward

Before the setup, we will need to do a port-forward of the services that kiali is using.

We can use the hack/run-kiali.sh script for this purpose. It can work without any options. Pass –help to see the options it takes.

An example to run it following the above schema:

./run-kiali.sh -pg 13000:3000 -pp 19090:9090 -app 8080 -es false -iu http://127.0.0.1:15014

Local Configuration File

The go process will require a configuration to point to these services and other specific configurations. This file will be places in ~/kiali/config.yaml, and referenced later by the GO local process.

api:
  namespaces:
    exclude:
      - istio-operator
      - kube.*
      - openshift.*
      - ibm.*
      - kiali-operator
    label_selector: ""
server:
  address: localhost
  port: 8000
  static_content_root_directory: /home/userTests/kiali-static-files
in_cluster: false
deployment:
  accessible_namespaces: [ "**" ]
extensions:
  iter_8:
    enabled: true
external_services:
  istio:
    istio_canary_revision:
      current: prod
      upgrade: canary
    url_service_version: http://localhost:15014/version
    config_map_name: istio
    istio_identity_domain: svc.cluster.local
  prometheus:
    url: http://localhost:19090
    cache_enabled: true
  tracing:
    enabled: true
    in_cluster_url: http://localhost:16685/jaeger
    url: http://localhost:16686/jaeger
    use_grpc: false
    whitelist_istio_system:
    - jaeger-query
    - istio-ingressgateway
    namespace: istio-system
    port: 443
    service: tracing
    auth:
      insecure_skip_verify: false
      password: cTSM/77tNZ0yGw/ZJXkO7IObbemLJjFkCp4GuqLzXIgE8RWrJvWjFViv9Dpu0SguxD3N/oCUPJnyreoHuSCNZ9kFTrHgRl033waUpTAYZPCEzMPw9Rui5C3/o5x4bclHq0IQ8OGr5LuN2L1WCXrEo9iUntPMovbsP1Alqwh0LZ79ztIkObNBNniX1tuo0fM9O53QKSAjGBnK13LFjHC7wXo+mWw1fzHf9x4jib6UDbeuzHfugDS0Mtj4E9QDRHjpPUrh66dVib4kCJ4nMO19BuiIk+OgbNdhBhg3wn1fn7F6+d/i6Mbq/C/OJylSL6ewUVwIvIAmcRM/jdTqdz0w
      type: basic
      use_kiali_token: false
      username: internal
  grafana:
    in_cluster_url: http://localhost:13000
    url: http://localhost:13000
    dashboards:
      - name: "Istio Service Dashboard"
        variables:
          namespace: "var-namespace"
          service: "var-service"
      - name: "Istio Workload Dashboard"
        variables:
          namespace: "var-namespace"
          workload: "var-workload"
  custom_dashboards:
    enabled: false
#health_config:
#  rate:
#    - namespace: "alpha"
#      tolerance:
#        - code: "4XX"
#          degraded: 30
#          failure: 50
#          protocol: "http"
#        - code: "5XX"
#          degraded: 30
#          failure: 50
#          protocol: "http"
#    - namespace: "beta"
#      tolerance:
#        - code: "[4]\\d\\d"
#          degraded: 30
#          failure: 40
#          protocol: "http"
#        - code: "[5]\\d\\d"
#          protocol: "http"
auth:
  strategy: anonymous
login_token:
  signing_key: test
kubernetes_config:
  cache_enabled: true
  cache_duration: 300
  cache_namespaces:
    - bookinfo
    - istio-system
  cache_token_namespace_duration: 120
  excluded_workloads: []
kiali_feature_flags:
  istio_injection_action: true
  istio_upgrade_action: false
istio_labels:
  app_label_name: app
  injection_label_name: istio-injection
  injection_label_rev: istio.io/rev
  version_label_name: version

Local Processes

In this section we will start the 3 local processes for kiali:

  • kiali-core: The backend Go process
  • kiali-ui: The frontend React process
  • browser: The Javascript debugger process.

In this example, we will create the configurations in the Jetbrains Golang IDE.

kiali-core

To run the Kiali backend. kiali-core

kiali-ui

In order to forward the requests to the backend propertly, we will need to add the following line in kiali/frontend/package.json:

"proxy": "http://localhost:8000",

kiali-ui

browser

This process is required to debug the frontend. browser

After running the 3 processes, we should be able to access Kiali GUI in localhost:3000

Using VisualStudio Code

To run kiali in a debugger, a file “launch.json” should be created in your local kiali local repo’s .vscode directory (e.g. home/source/kiali/kiali/.vscode/launch.json). The file should look like:

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Launch Kiali to use hack script services",
      "type": "go",
      "request": "launch",
      "mode": "debug",
      "program": "${workspaceRoot}/kiali.go",
      "cwd": "${env:HOME}/tmp/run-kiali",
      "args": ["-config", "${env:HOME}/tmp/run-kiali/run-kiali-config.yaml"],
      "env": {
        "KUBERNETES_SERVICE_HOST": "127.0.0.1",
        "KUBERNETES_SERVICE_PORT": "8001",
        "LOG_LEVEL": "trace"
      }     
    }
  ]
}

run-kiali.sh should be started like this:

hack/run-kiali.sh --tmp-root-dir $HOME/tmp --enable-server false
Last modified September 20, 2022 : Modify development environment page, to clarify some concepts (#576) (081ee83)