How to set multiple commands in one yaml file with Kubernetes?

How to set multiple commands in one yaml file with Kubernetes?

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How to set multiple commands in one yaml file with Kubernetes?
Tag : development , By : Milander
Date : December 01 2020, 05:00 PM

To fix the issue you can do In this official document, it can run command in a yaml config file:
command: ["/bin/sh","-c"]
args: ["command one; command two && command three"]

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Using Lists or triple dashes to put multiple Kubernetes objects in one YAML file: purely a stylistic choice?

Tag : kubernetes , By : 小和尚
Date : March 29 2020, 07:55 AM
I wish this helpful for you I can think of two reasons:
Because the Kubernetes API works with JSON and in JSON there is no --- Maybe the kind List is meant only for responses.

Using ruamel.yaml to update yaml block in yaml file which contains multiple yamls

Tag : python , By : Joe Sweeney
Date : March 29 2020, 07:55 AM
With these it helps Your file consists of multiple YAML documents, this is what you read in using round_trip_load_all, which gives you a generator.
If you write that back using round_trip_dump(), you are never going to get the --- YAML document separators that are in the original file.
import sys
import ruamel.yaml

yaml = ruamel.yaml.YAML()
yaml.preserve_quotes = True
data = list(yaml.load_all(open('app.yaml')))

# parse the most recent git commit sha from command line
# docker_image = 'blockfreight/go-bftx:ci-cd-' + check_output('git log -1 -- pretty=format:%h'.split()).decode()
docker_image = 'blockfreight/go-bftx:ci-cd-' + 'check_output_output'

# update go-bftx image with most recent git-commit-sha tag in the StatefulSet block
data[-1]['spec']['template']['spec']['containers'][1]['image'] = docker_image

with open('out.yaml', 'w') as ofp:
    yaml.dump_all(data, ofp)
import sys
import ruamel.yaml

with open('out.yaml', 'w') as ofp:
    lines = ''
    with open('app.yaml') as ifp:
        for line in ifp:
            lines += line
            if line == '---\n':
                lines = ''
    # process lines from the last document
    # print(lines)
    yaml = ruamel.yaml.YAML()
    yaml.preserve_quotes = True
    data = yaml.load(lines)

    # parse the most recent git commit sha from command line
    # docker_image = 'blockfreight/go-bftx:ci-cd-' + check_output('git log -1 -- pretty=format:%h'.split()).decode()
    docker_image = 'blockfreight/go-bftx:ci-cd-' + 'check_output_output'

    # update go-bftx image with most recent git-commit-sha tag in the StatefulSet block
    data['spec']['template']['spec']['containers'][1]['image'] = docker_image

    yaml.dump(data, ofp)
--- app.yaml    2018-06-23 14:41:02.256290577 +0200
+++ out.yaml    2018-06-23 14:58:09.933991459 +0200
@@ -143,7 +143,7 @@
-       app: bftx
+      app: bftx
   serviceName: blockfreight
   replicas: 1
@@ -151,7 +151,7 @@
         app: bftx
-     containers:
+      containers:
       - name: tm
         imagePullPolicy: IfNotPresent
         image: tendermint/tendermint:0.20.0
@@ -199,7 +199,7 @@
           tendermint node --moniker="`hostname`" --p2p.seeds="aeabbf6b891435013f2a800fa9e22a1451ca90fd@bftx0.blockfreight.net:8888,6e9515c2cfed19464e6ce11ba2297ecdb411103b@bftx1.blockfreight.net:8888,b8b988370783bd0e58bf926d621a47160af2bdae@bftx2.blockfreight.net:8888,8c091f4e3dc4ac27db1efd38beee012d99967fd8@bftx3.blockfreight.net:8888" --proxy_app="tcp://localhost:46658" --consensus.create_empty_blocks=false
       - name: app
         imagePullPolicy: Always
-        image: blockfreight/go-bftx:rc1
+        image: blockfreight/go-bftx:ci-cd-check_output_output
         - containerPort: 12345
         - containerPort: 46658
@@ -247,7 +247,7 @@
         - mountPath: /etc/nginx/conf.d/pub_key.conf
           name: tmconfigdir
           subPath: pub_key_nginx.conf
-     volumes:
+      volumes:
       - name: tmconfigdir
           name: bftx-config
@@ -262,7 +262,7 @@
         volume.alpha.kubernetes.io/storage-class: anything
-      accessModes: [ "ReadWriteOnce" ]
+      accessModes: ["ReadWriteOnce"]
           storage: 2Gi
@@ -271,7 +271,7 @@
         volume.alpha.kubernetes.io/storage-class: anything
-      accessModes: [ "ReadWriteOnce" ]
+      accessModes: ["ReadWriteOnce"]
           storage: 12Mi

How can i check downloaded images in kubernetes(I'm using image in kubernetes yaml file)? Or, what is similar to 'docker

Tag : kubernetes , By : Navin
Date : March 29 2020, 07:55 AM
Hope that helps There is no equivalent command. The kubelet downloads images on demand, but really it just passes those commands on to the underlying system so to check which images are actually resident, you would need to know what CRI plugin you are using and talk to that. In general you don’t worry much about images in Kubernetes, they are automatically managed by the kubelet for you.

How to handle multiple ports under the same container in kubernetes yaml file

Tag : kubernetes , By : k19k
Date : March 29 2020, 07:55 AM
This might help you snippet inside docker-compose.yml
  - name: graphite
    image: sitespeedio/graphite:1.1.5-3
    restartPolicy: Always
    - containerPort: 2003
      name: graphite_two 
    - containerPort: 8080
      name: graphite_one 

Using client-go to `kubectl apply` against the Kubernetes API directly with multiple types in a single YAML file

Tag : go , By : Paolo
Date : March 29 2020, 07:55 AM
wish helps you It sounds like you've figured out how to deserialize YAML files into Kubernetes runtime.Objects, but the problem is dynamically deploying a runtime.Object without writing special code for each Kind.
kubectl achieves this by interacting with the REST API directly. Specifically, via resource.Helper.
import (
    meta "k8s.io/apimachinery/pkg/api/meta"

func createObject(kubeClientset kubernetes.Interface, restConfig rest.Config, obj runtime.Object) error {
    // Create a REST mapper that tracks information about the available resources in the cluster.
    groupResources, err := restmapper.GetAPIGroupResources(kubeClientset.Discovery())
    if err != nil {
        return err
    rm := restmapper.NewDiscoveryRESTMapper(groupResources)

    // Get some metadata needed to make the REST request.
    gvk := obj.GetObjectKind().GroupVersionKind()
    gk := schema.GroupKind{Group: gvk.Group, Kind: gvk.Kind}
    mapping, err := rm.RESTMapping(gk, gvk.Version)
    if err != nil {
        return err

    name, err := meta.NewAccessor().Name(obj)
    if err != nil {
        return err

    // Create a client specifically for creating the object.
    restClient, err := newRestClient(restConfig, mapping.GroupVersionKind.GroupVersion())
    if err != nil {
        return err

    // Use the REST helper to create the object in the "default" namespace.
    restHelper := resource.NewHelper(restClient, mapping)
    return restHelper.Create("default", false, obj, &metav1.CreateOptions{})

func newRestClient(restConfig rest.Config, gv schema.GroupVersion) (rest.Interface, error) {
    restConfig.ContentConfig = resource.UnstructuredPlusDefaultContentConfig()
    restConfig.GroupVersion = &gv
    if len(gv.Group) == 0 {
        restConfig.APIPath = "/api"
    } else {
        restConfig.APIPath = "/apis"

    return rest.RESTClientFor(&restConfig)

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