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 Arquitecture, 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:
- oc or kubectl
- go
- make
- npm
- yarn
Istio and required services are running in Minikube or open shift. To install it following the above schema, it is possible to use the following scripts:
- 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.

We will need to fork the 3 kiali repositories, and then, clone them in a local folder:

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

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

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 August 9, 2022 : created new section, how to set up development environment (#537) (ee4e390)