I am writing my first program in Golang, or rather modifying a template, if you will. Want to parse values from a yaml file.
apiVersion: "backend.example.com/v1alpha1"
kind: "Example"
metadata:
name: "solar-demo"
spec:
size: 2
group: backend.example.com
names:
kind: Example
listKind: ExampleList
plural: solar-demos
singular: solar-demo
scope: Namespaced
version: v1alpha1
pods:
- name: api
image: "shmukler/docker_solar-api"
port: 3000
command: '{"npm", "run", "start-api"}'
- name: service
image: "shmukler/docker_solar-svc"
port: 3001
command: '{"npm", "run", "start-solar-svc"}'
To parse-out variables, I do:
type Example struct {
metav1.TypeMeta `json:",inline"`
metav1.ObjectMeta `json:"metadata"`
Spec ExampleSpec `json:"spec"`
Status ExampleStatus `json:"status,omitempty"`
}
type ExampleSpec struct {
Size int32 `json:"size"`
// Pods []ExamplePod `json:"pods"`
}
type ExampleStatus struct {
Nodes []string `json:"nodes"`
}
type ExamplePod struct {
Name []string `json:"name"`
Image []string `json:"image"`
Port int32 `json:"port"`
Command []string `json:"command"`
}
If I comment out the Pods []ExamplePod line, the code works albeit without parsing the Pods array. If I leave it in, there is an error, as soon as I pass the yaml document - Observed a panic: &errors.errorString{s:"failed to decode json data with gvk...
I want to stick pods into an array of structures of the type ExamplePod.
Today is my first day working with Go language. Sorry for a stupid question. My yaml, the relevant fragment in JSON representation.
spec":{
"group":"backend.example.com",
"names":{
"kind”:”Example”,
"listKind”:”ExampleList",
"plural":"solar-demos",
"singular":"solar-demo"
},
"pods":[
{
"command":"{\"npm\", \"run\", \"start-api\"}",
"image":"shmukler/docker_solar-api",
"name":"api",
"port":3000
},
{
"command":"{\"npm\", \"run\", \"start-solar-svc\"}",
"image":"shmukler/docker_solar-svc",
"name":"service",
"port":3001
}
],
"scope":"Namespaced",
"size":2,
"version":"v1alpha1"
}
I am able to get example.Spec.Size just fine. What I am missing is the pods array.
Using the suggestions from both offered answers changed the YAML to:
containers:
- name: api
image: "shmukler/docker_solar-api"
port: 3000
command: ["npm", "run", "start-api"]
- name: service
image: "shmukler/docker_solar-svc"
port: 3001
command: ["npm", "run", "start-solar-svc"]
Then, updated definitions to:
type Spec struct {
Size int32 `json:"size"`
Containers []Container `json:"containers"`
}
type Status struct {
Nodes []string `json:"nodes"`
}
type Container struct {
Name string `json:"name"`
Image string `json:"image"`
Port int32 `json:"port"`
Command []string `json:"command"`
}
That finally worked fine.
Thank you for the answers, helped me to understand how Golang type definitions work.
Collected from the Internet
Please contact [email protected] to delete if infringement.
Comments