describe

package
v0.1.0 Latest Latest
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 Go to latest Published: Sep 6, 2019 License: Apache-2.0 Imports: 17 Imported by: 0

Documentation

Overview

Package describe contains describers similar to Kubectl's describe package.

Index

Examples

Constants

This section is empty.

Variables

This section is empty.

Functions

func AppSpecInstances 

func AppSpecInstances(w io.Writer, instances kfv1alpha1.AppSpecInstances)

AppSpecInstances describes the scaling features of the app.

Example (Exactly) 
package main

import (
	"os"

	kfv1alpha1 "github.com/google/kf/pkg/apis/kf/v1alpha1"
	"github.com/google/kf/pkg/kf/describe"
)

func main() {
	exactly := 3
	instances := kfv1alpha1.AppSpecInstances{}
	instances.Stopped = true
	instances.Exactly = &exactly

	describe.AppSpecInstances(os.Stdout, instances)

}

Output:

Scale:
  Stopped?:  true
  Exactly:   3
Example (MinMax) 
package main

import (
	"os"

	kfv1alpha1 "github.com/google/kf/pkg/apis/kf/v1alpha1"
	"github.com/google/kf/pkg/kf/describe"
)

func main() {
	min := 3
	max := 5
	instances := kfv1alpha1.AppSpecInstances{}
	instances.Min = &min
	instances.Max = &max

	describe.AppSpecInstances(os.Stdout, instances)

}

Output:

Scale:
  Stopped?:  false
  Min:       3
  Max:       5
Example (MinOnly) 
package main

import (
	"os"

	kfv1alpha1 "github.com/google/kf/pkg/apis/kf/v1alpha1"
	"github.com/google/kf/pkg/kf/describe"
)

func main() {
	min := 3
	instances := kfv1alpha1.AppSpecInstances{}
	instances.Min = &min

	describe.AppSpecInstances(os.Stdout, instances)

}

Output:

Scale:
  Stopped?:  false
  Min:       3
  Max:       ∞

func AppSpecTemplate 

func AppSpecTemplate(w io.Writer, template kfv1alpha1.AppSpecTemplate)

AppSpecTemplate describes the runtime configurations of the app.

Example (ResourceRequests) 
package main

import (
	"os"

	kfv1alpha1 "github.com/google/kf/pkg/apis/kf/v1alpha1"
	"github.com/google/kf/pkg/kf/describe"

	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/api/resource"
)

func main() {

	wantMem := resource.MustParse("2Gi")
	wantStorage := resource.MustParse("2Gi")
	wantCPU := resource.MustParse("2")

	spec := kfv1alpha1.AppSpecTemplate{
		Spec: corev1.PodSpec{
			Containers: []corev1.Container{{
				Resources: corev1.ResourceRequirements{
					Requests: corev1.ResourceList{
						corev1.ResourceMemory:           wantMem,
						corev1.ResourceEphemeralStorage: wantStorage,
						corev1.ResourceCPU:              wantCPU,
					},
				},
			}},
		},
	}

	describe.AppSpecTemplate(os.Stdout, spec)

}

Output:

Resource requests:
  Memory:   2Gi
  Storage:  2Gi
  CPU:      2

func DuckStatus 

func DuckStatus(w io.Writer, duck duckv1beta1.Status)

DuckStatus prints a table of status info based on the duck status.

Example (Ready) 
package main

import (
	"os"

	"github.com/google/kf/pkg/kf/describe"

	v1 "k8s.io/api/core/v1"
	"knative.dev/pkg/apis"

	duckv1beta1 "knative.dev/pkg/apis/duck/v1beta1"
)

func main() {
	status := duckv1beta1.Status{
		Conditions: duckv1beta1.Conditions{
			{Status: v1.ConditionTrue, Type: "SecretReady"},
			{Status: v1.ConditionUnknown, Type: apis.ConditionReady, Reason: "NamespaceErr", Message: "problem with namespace"},
			{Status: v1.ConditionFalse, Type: "NamespaceReady", Reason: "NotOwned", Message: "couldn't create"},
		},
	}

	describe.DuckStatus(os.Stdout, status)

}

Output:

Status:
  Ready:
    Ready:    Unknown
    Message:  problem with namespace
    Reason:   NamespaceErr
  Conditions:
    Type            Status  Updated    Message          Reason
    NamespaceReady  False   <unknown>  couldn't create  NotOwned
    SecretReady     True    <unknown>
Example (Succeeded) 
package main

import (
	"os"

	"github.com/google/kf/pkg/kf/describe"

	v1 "k8s.io/api/core/v1"
	"knative.dev/pkg/apis"

	duckv1beta1 "knative.dev/pkg/apis/duck/v1beta1"
)

func main() {
	status := duckv1beta1.Status{
		Conditions: duckv1beta1.Conditions{
			{Status: v1.ConditionUnknown, Type: apis.ConditionSucceeded, Reason: "NamespaceErr", Message: "problem with namespace"},
			{Status: v1.ConditionFalse, Type: "NamespaceReady", Reason: "NotOwned", Message: "couldn't create"},
		},
	}

	describe.DuckStatus(os.Stdout, status)

}

Output:

Status:
  Succeeded:
    Ready:    Unknown
    Message:  problem with namespace
    Reason:   NamespaceErr
  Conditions:
    Type            Status  Updated    Message          Reason
    NamespaceReady  False   <unknown>  couldn't create  NotOwned

func EnvVars 

func EnvVars(w io.Writer, vars []corev1.EnvVar)

EnvVars prints out environment variables.

Example (Empty) 
package main

import (
	"os"

	"github.com/google/kf/pkg/kf/describe"
)

func main() {
	describe.EnvVars(os.Stdout, nil)

}

Output:

Environment: <empty>
Example (Populated) 
package main

import (
	"os"

	"github.com/google/kf/pkg/kf/describe"

	corev1 "k8s.io/api/core/v1"
)

func main() {
	env := []corev1.EnvVar{
		{Name: "FIRST", Value: "first-value"},
		{Name: "SECOND", Value: "second-value"},
	}

	describe.EnvVars(os.Stdout, env)

}

Output:

Environment:
  FIRST:   first-value
  SECOND:  second-value

func HealthCheck 

func HealthCheck(w io.Writer, healthCheck *corev1.Probe)

HealthCheck prints a Readiness Probe in a friendly manner

Example (Http) 
package main

import (
	"os"

	"github.com/google/kf/pkg/kf/describe"

	corev1 "k8s.io/api/core/v1"
)

func main() {
	describe.HealthCheck(os.Stdout, &corev1.Probe{
		TimeoutSeconds: 42,
		Handler: corev1.Handler{
			HTTPGet: &corev1.HTTPGetAction{Path: "/healthz"},
		},
	})

}

Output:

Health Check:
  Timeout:   42s
  Type:      http
  Endpoint:  /healthz
Example (Nil) 
package main

import (
	"os"

	"github.com/google/kf/pkg/kf/describe"
)

func main() {
	describe.HealthCheck(os.Stdout, nil)

}

Output:

Health Check: <empty>
Example (Tcp) 
package main

import (
	"os"

	"github.com/google/kf/pkg/kf/describe"

	corev1 "k8s.io/api/core/v1"
)

func main() {
	describe.HealthCheck(os.Stdout, &corev1.Probe{
		TimeoutSeconds: 42,
		Handler: corev1.Handler{
			TCPSocket: &corev1.TCPSocketAction{},
		},
	})

}

Output:

Health Check:
  Timeout:  42s
  Type:     port (tcp)

func IndentWriter 

func IndentWriter(w io.Writer, f func(io.Writer))

IndentWriter creates a new writer that indents all lines passing through it by two spaces.

Example 
w := os.Stdout
fmt.Fprintln(w, "Level0")
IndentWriter(w, func(w io.Writer) {
	fmt.Fprintln(w, "Level1")
	IndentWriter(w, func(w io.Writer) {
		fmt.Fprintln(w, "Level2")
	})
})

Output:

Level0
  Level1
    Level2

func Labels 

func Labels(w io.Writer, labels map[string]string)

Labels prints a label map by the alphanumeric sorting of the keys.

func ObjectMeta 

func ObjectMeta(w io.Writer, meta metav1.ObjectMeta)

ObjectMeta prints the normal object metadata associated with standard K8s objects.

func RouteSpecFieldsList 

func RouteSpecFieldsList(w io.Writer, routes []kfv1alpha1.RouteSpecFields)

RouteSpecFieldsList prints a list of routes

func SectionWriter 

func SectionWriter(w io.Writer, name string, f func(io.Writer))

SectionWriter writes a section heading with the given name then calls f with a tab aligning indenting writer to format the contents of the section.

Example (Empty) 
SectionWriter(os.Stdout, "SectionName", func(_ io.Writer) {
	// No output
})

Output:

SectionName: <empty>
Example (Populated) 
SectionWriter(os.Stdout, "OperatingSystems", func(w io.Writer) {
	fmt.Fprintln(w, "Linux:\tOSS")
	fmt.Fprintln(w, "DOS:\tPaid")
	fmt.Fprintln(w, "BeOS:\tDead")
})

Output:

OperatingSystems:
  Linux:  OSS
  DOS:    Paid
  BeOS:   Dead

func ServiceInstance 

func ServiceInstance(w io.Writer, service *v1beta1.ServiceInstance)

ServiceInstance

Example 
package main

import (
	"os"
	"time"

	"github.com/google/kf/pkg/kf/describe"
	"github.com/poy/service-catalog/pkg/apis/servicecatalog/v1beta1"

	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
)

func main() {
	describe.ServiceInstance(os.Stdout, &v1beta1.ServiceInstance{
		ObjectMeta: metav1.ObjectMeta{
			Name: "myservice-instance",
		},
		Spec: v1beta1.ServiceInstanceSpec{
			PlanReference: v1beta1.PlanReference{
				ClusterServiceClassExternalName: "myclass",
				ClusterServicePlanExternalName:  "myplan",
			},
			Parameters: &runtime.RawExtension{
				Raw: []byte(`{"some":"params"}`),
			},
		},
		Status: v1beta1.ServiceInstanceStatus{
			Conditions: []v1beta1.ServiceInstanceCondition{
				{Status: "Wrong"},
				{LastTransitionTime: metav1.Time{Time: time.Now()}, Reason: "Ready"},
			},
		},
	})

}

Output:

Service Instance:
  Name:     myservice-instance
  Service:  myclass
  Plan:     myplan
  Parameters:
    some: params
  Status:  Ready
Example (Nil) 
package main

import (
	"os"

	"github.com/google/kf/pkg/kf/describe"
)

func main() {
	describe.ServiceInstance(os.Stdout, nil)

}

Output:

Service Instance: <empty>

func SourceSpec 

func SourceSpec(w io.Writer, spec kfv1alpha1.SourceSpec)

SourceSpec describes the source of an application and the build process it will undergo.

Example (Buildpack) 
package main

import (
	"os"

	kfv1alpha1 "github.com/google/kf/pkg/apis/kf/v1alpha1"
	"github.com/google/kf/pkg/kf/describe"
)

func main() {
	spec := kfv1alpha1.SourceSpec{
		ServiceAccount: "builder-account",
		BuildpackBuild: kfv1alpha1.SourceSpecBuildpackBuild{
			Source:           "gcr.io/my-registry/src-mysource",
			Stack:            "cflinuxfs3",
			BuildpackBuilder: "gcr.io/my-registry/my-builder:latest",
			Image:            "gcr.io/my-registry/my-image:latest",
		},
	}

	describe.SourceSpec(os.Stdout, spec)

}

Output:

Source:
  Build Type:       buildpack
  Service Account:  builder-account
  Buildpack Build:
    Source:       gcr.io/my-registry/src-mysource
    Stack:        cflinuxfs3
    Bulider:      gcr.io/my-registry/my-builder:latest
    Destination:  gcr.io/my-registry/my-image:latest
    Environment: <empty>
Example (Docker) 
package main

import (
	"os"

	kfv1alpha1 "github.com/google/kf/pkg/apis/kf/v1alpha1"
	"github.com/google/kf/pkg/kf/describe"
)

func main() {
	spec := kfv1alpha1.SourceSpec{
		ServiceAccount: "builder-account",
		ContainerImage: kfv1alpha1.SourceSpecContainerImage{
			Image: "mysql/mysql",
		},
	}

	describe.SourceSpec(os.Stdout, spec)

}

Output:

Source:
  Build Type:       container
  Service Account:  builder-account
  Container Image:
    Image:  mysql/mysql

func TabbedWriter 

func TabbedWriter(w io.Writer, f func(io.Writer))

TabbedWriter indents all tabbed output to be aligned.

Example 
TabbedWriter(os.Stdout, func(w io.Writer) {
	fmt.Fprintln(w, "OS\tAGE")
	fmt.Fprintln(w, "Linux\t20y")
	fmt.Fprintln(w, "DOS\t40y")
	fmt.Fprintln(w, "BeOS\t20y")
})

Output:

OS     AGE
Linux  20y
DOS    40y
BeOS   20y

func TypeMeta 

func TypeMeta(w io.Writer, meta metav1.TypeMeta)

TypeMeta prints information about the type.

Example 
package main

import (
	"os"

	"github.com/google/kf/pkg/kf/describe"

	v1 "k8s.io/api/core/v1"
)

func main() {
	s := &v1.Secret{}
	s.Kind = "Secret"
	s.APIVersion = "v1"

	describe.TypeMeta(os.Stdout, s.TypeMeta)

}

Output:

API Version:  v1
Kind:         Secret

Types

This section is empty.

Source Files

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