it shows how many containers in a pod are considered ready. You can have some containers starting faster then others or having their readiness checks not yet fulfilled (or still in initial delay). In such cases there will be less containers ready in pod then their total number (ie. 1/2) hence the whole pod will not be considered ready.

I have a large array and need to access it by a key (a lookup) so I need to create Dictionary.  Is there a built in function in Swift 3.0 to do so, or do I need to write it myself?

First I will need it for a class with key &quot;String&quot; and later on maybe I will be able to write a template version for general purpose (all types of data and key).

---


Note for 2019. This is now simply **built-in to Swift 5**, `uniqueKeysWithValues` and similar calls.

Swift 3: Array to Dictionary?

In pandas, this can be done by `column.name`.

But how to do the same when it&#39;s a column of Spark dataframe?

E.g. the calling program has a Spark dataframe: `spark_df`

    &gt;&gt;&gt; spark_df.columns
    [&#39;admit&#39;, &#39;gre&#39;, &#39;gpa&#39;, &#39;rank&#39;]

This program calls my function: `my_function(spark_df[&#39;rank&#39;])`  
In `my_function`, I need the name of the column, i.e. `&#39;rank&#39;`.

If it was pandas dataframe, we could use this:

    &gt;&gt;&gt; pandas_df[&#39;rank&#39;].name
    &#39;rank&#39;



How to get name of dataframe column in PySpark?

    kubectl get pod run-sh-1816639685-xejyk 
    NAME                      READY     STATUS    RESTARTS   AGE
    run-sh-1816639685-xejyk   2/2       Running   0          26m

What&#39;s the meaning of &quot;READY=2/2&quot;? The same with &quot;1/1&quot;?

What&#39;s the meaning of &quot;READY=2/2&quot; output by command &quot;kubectl get pod $yourpod&quot;

<pre><code class="hljs language-arduino">kubectl get pod run-sh-1816639685-xejyk 
NAME READY STATUS RESTARTS AGE
run-sh-1816639685-xejyk 2/2 Running 0 26m
</code></pre>
What's the meaning of "READY=2/2"? The same with "1/1"?

I have problem login into one container of a multi-container pod.
I get the container id from the `kubectl describe pod &lt;pod-name&gt;`

    kubectl describe pod ipengine-net-benchmark-488656591-gjrpc -c &lt;container id&gt; 

When i try: 

    kubectl exec -ti ipengine-net-benchmark-488656591-gjrpc -c 70761432854f /bin/bash

It says: Error from server: container 70761432854f is not valid for pod ipengine-net-benchmark-488656591-gjrpc





kubectl exec into container of a multi container pod

I have the following image created by a Dockerfile:

```
REPOSITORY   TAG      IMAGE ID       CREATED       SIZE 
ruby/lab     latest   f1903b1508cb   2 hours ago   729.6 MB
```

And I have my following YAML file:

    apiVersion: extensions/v1beta1
    kind: Deployment
    metadata:
      name: ruby-deployment
    spec:
      replicas: 2
      template:
        metadata:
          labels:
            app: ruby
        spec:
          containers:
          - name: ruby-app
            image: ruby/lab
            imagePullPolicy: IfNotPresent
            ports:
            - containerPort: 4567

When I create the deployment I got the following info in the pods:

    ruby-deployment-3830038651-sa4ii   0/1       ImagePullBackOff   0          7m
    ruby-deployment-3830038651-u1tvc   0/1       ImagePullBackOff   0          7m

And the error `Failed to pull image &quot;ruby/lab:latest&quot;: Error: image ruby/lab not found` from below:

     8m            2m              6       {kubelet minikube}      spec.containers{ruby}   Normal          Pulling         pulling image &quot;ruby/lab:latest&quot;
     8m            2m              6       {kubelet minikube}      spec.containers{ruby}   Warning         Failed          Failed to pull image &quot;ruby/lab:latest&quot;: Error: image ruby/lab not found
     8m            2m              6       {kubelet minikube}                              Warning         FailedSync      Error syncing pod, skipping: failed to &quot;StartContainer&quot; for &quot;ruby&quot; with ErrImagePull: &quot;Error: image ruby/lab not found&quot;

Is really necessary to have registry in docker for this? I just want to make test locally and pass my code/repo to a friend for testing purposes

Thanks

Pull a local image to run a pod in Kubernetes

I am new to kubernetes. I have an issue in the pods. When I run the command

     kubectl get pods

Result:

    NAME                   READY     STATUS             RESTARTS   AGE
    mysql-apim-db-1viwg    1/1       Running            1          20h
    mysql-govdb-qioee      1/1       Running            1          20h
    mysql-userdb-l8q8c     1/1       Running            0          20h
    wso2am-default-813fy   0/1       ImagePullBackOff   0          20h

Due to an issue of &quot;wso2am-default-813fy&quot; node, I need to restart it. Any suggestion? 


How to retry image pull in a kubernetes Pods?

I am trying to use kubectl run command to pull an image from private registry and run a command from that. But I don&#39;t see an option to specify image pull secret. It looks like it is not possible to pass image secret as part for run command. 

Is there any alternate option to pull a container and run a command using kubectl? The command output should be seen on the console. Also once the command finishes the pod should die.

How to pass image pull secret while using &#39;kubectl run&#39; command?

I do have deployment with single pod, with my custom docker image like:

    containers:
      - name: mycontainer
        image: myimage:latest

During development I want to push new latest version and make Deployment updated.
Can&#39;t find how to do that, without explicitly defining tag/version and increment it for each build, and do
 
    kubectl set image deployment/my-deployment mycontainer=myimage:1.9.1

Kubernetes how to make Deployment to update image

I have an admin.conf file containing info about a cluster, so that the following command works fine:

    kubectl --kubeconfig ./admin.conf get nodes

How can I `config` kubectl to use the cluster, user and authentication from this file as default in one command? I only see separate set-cluster, set-credentials, set-context, use-context etc. I want to get the same output when I simply run:

    kubectl get nodes


How to configure kubectl with cluster information from a .conf file?

I have started pods with command

```shell
$ kubectl run busybox \
--image=busybox \
--restart=Never \
--tty \
-i \
--generator=run-pod/v1
```

Something went wrong, and now I can&#39;t delete this `Pod`.

I tried using the methods described below but the `Pod` keeps being recreated.

```shell
$ kubectl delete pods  busybox-na3tm
pod &quot;busybox-na3tm&quot; deleted

$ kubectl get pods
NAME                                     READY     STATUS              RESTARTS   AGE
busybox-vlzh3                            0/1       ContainerCreating   0          14s

$ kubectl delete pod busybox-vlzh3 --grace-period=0

$ kubectl delete pods --all
pod &quot;busybox-131cq&quot; deleted
pod &quot;busybox-136x9&quot; deleted
pod &quot;busybox-13f8a&quot; deleted
pod &quot;busybox-13svg&quot; deleted
pod &quot;busybox-1465m&quot; deleted
pod &quot;busybox-14uz1&quot; deleted
pod &quot;busybox-15raj&quot; deleted
pod &quot;busybox-160to&quot; deleted
pod &quot;busybox-16191&quot; deleted

$ kubectl get pods --all-namespaces
NAMESPACE   NAME            READY     STATUS              RESTARTS   AGE
default     busybox-c9rnx   0/1       RunContainerError   0          23s
```


Kubernetes pod gets recreated when deleted

I&#39;ve created a Kubernetes cluster on AWS with [kops](https://github.com/kubernetes/kops) and can successfully administer it via `kubectl` from my local machine.

I can view the current config with `kubectl config view` as well as directly access the stored state at `~/.kube/config`, such as:


    apiVersion: v1
    clusters:
    - cluster:
        certificate-authority-data: REDACTED
        server: https://api.{CLUSTER_NAME}
      name: {CLUSTER_NAME}
    contexts:
    - context:
        cluster: {CLUSTER_NAME}
        user: {CLUSTER_NAME}
      name: {CLUSTER_NAME}
    current-context: {CLUSTER_NAME}
    kind: Config
    preferences: {}
    users:
    - name: {CLUSTER_NAME}
      user:
        client-certificate-data: REDACTED
        client-key-data: REDACTED
        password: REDACTED
        username: admin
    - name: {CLUSTER_NAME}-basic-auth
      user:
        password: REDACTED
        username: admin


I need to enable other users to also administer. This [user guide](https://kubernetes.io/docs/user-guide/sharing-clusters/) describes how to define these on another users machine, but doesn&#39;t describe how to actually create the user&#39;s credentials within the cluster itself. How do you do this?

Also, is it safe to just share the `cluster.certificate-authority-data`?


How to Add Users to Kubernetes (kubectl)?

I am trying to install several GCP components from the [gcloud command-line tool](https://cloud.google.com/sdk/gcloud) and always get the same error:

    $ gcloud components list
    
    Your current Cloud SDK version is: 146.0.0
    The latest available version is: 146.0.0
    
    ┌─────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
    │                                                  Components                                                 │
    ├───────────────┬──────────────────────────────────────────────────────┬──────────────────────────┬───────────┤
    │     Status    │                         Name                         │            ID            │    Size   │
    ├───────────────┼──────────────────────────────────────────────────────┼──────────────────────────┼───────────┤
    │ Not Installed │ App Engine Go Extensions                             │ app-engine-go            │  47.9 MiB │
    │ Not Installed │ Bigtable Command Line Tool                           │ cbt                      │   3.8 MiB │
    │ Not Installed │ Cloud Datalab Command Line Tool                      │ datalab                  │   &lt; 1 MiB │
    │ Not Installed │ Cloud Datastore Emulator                             │ cloud-datastore-emulator │  15.4 MiB │
    │ Not Installed │ Cloud Datastore Emulator (Legacy)                    │ gcd-emulator             │  38.1 MiB │
    │ Not Installed │ Cloud Pub/Sub Emulator                               │ pubsub-emulator          │  21.0 MiB │
    │ Not Installed │ Google Container Registry&#39;s Docker credential helper │ docker-credential-gcr    │   3.3 MiB │
    │ Not Installed │ gcloud app Java Extensions                           │ app-engine-java          │ 128.3 MiB │
    │ Not Installed │ gcloud app Python Extensions                         │ app-engine-python        │   7.2 MiB │
    │ Not Installed │ kubectl                                              │ kubectl                  │  11.5 MiB │
    │ Installed     │ BigQuery Command Line Tool                           │ bq                       │   &lt; 1 MiB │
    │ Installed     │ Cloud SDK Core Libraries                             │ core                     │   5.7 MiB │
    │ Installed     │ Cloud Storage Command Line Tool                      │ gsutil                   │   2.8 MiB │
    │ Installed     │ Default set of gcloud commands                       │ gcloud                   │           │
    │ Installed     │ gcloud Alpha Commands                                │ alpha                    │   &lt; 1 MiB │
    │ Installed     │ gcloud Beta Commands                                 │ beta                     │   &lt; 1 MiB │
    └───────────────┴──────────────────────────────────────────────────────┴──────────────────────────┴───────────┘
    
Then attempting to install [kubectl](https://kubernetes.io/docs/reference/kubectl/overview/)

    $ gcloud components install kubectl

    You cannot perform this action because this Cloud SDK installation is 
    managed by an external package manager.  If you would like to get the 
    latest version, please see our main download page at:
    https://cloud.google.com/sdk/
    ERROR: (gcloud.components.install) The component manager is disabled for this installation

Any idea why is this error raised?

Content Type	Original Author	Original Content on Stackoverflow
Question	workhardcc	View Question on Stackoverflow
Solution 1 - Kubernetes	Radek 'Goblin' Pieczonka	View Answer on Stackoverflow

What's the meaning of "READY=2/2" output by command "kubectl get pod $yourpod"

Kubernetes Problem Overview

Kubernetes Solutions

Solution 1 - Kubernetes

How to get name of dataframe column in PySpark?

Swift 3: Array to Dictionary?

Attributions