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How to pass command line argument to kubectl create command


By : user6111799
Date : August 01 2020, 06:00 AM
help you fix your problem If I run the kubectl create -f deployment.yaml command with the following deployment.yaml file, everything succeeds. , You can use Environment variables in the deployment.yaml
code :
apiVersion: v1
kind: Pod
metadata:
 name: my_app
 labels:
  app: my_app
spec:
 containers:
  - name: my_app
    image: docker:5000/path_to_my_custom_image
    env:
    - name: SPECIAL_ARG_VAL
      value: "my_special_argument_val_for_my_app"
    args: ["$(SPECIAL_ARG_VAL)"]

apiVersion: v1
kind: Pod
metadata:
 name: my_app
 labels:
  app: my_app
spec:
 containers:
  - name: my_app
    image: docker:5000/path_to_my_custom_image
    env:
    - name: SPECIAL_ARG_VAL
      valueFrom:
        configMapKeyRef:
          name: special-config
          key: SPECIAL_VAL_KEY
    args: ["$(SPECIAL_ARG_VAL)"]
kubectl create configmap special-config --from-literal=SPECIAL_VAL_KEY=my_special_argument_val_for_my_app


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Passing argument to command line to connect and after connection established pass another argument in same command


By : r0gn0nz
Date : March 29 2020, 07:55 AM
will be helpful for those in need I have Server - Client application, from client side I am passing Server IP address as first argument and after the connection established i want to pass another argument. , To pass arguments to a process use this overload simply:
code :
   Process.Start("cmd.exe", "start notepad");

How to pass XML file content into java command as command line argument?


By : user3175706
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I have one xml file. I want to pass the xml content into java command line argument. , Untested code off the top of my head, so take it for what it's worth:
code :
File fl = new File("PATH/abc.xml")
String filecontent = fl.readLines().*trim().join(' ')
String cmd = "java -cp abc.jar package.CLASSNAME \"${filecontent}\"" 
Process proc = Runtime.getRuntime().exec(cmd);
proc.waitFor()
File fl = new File("PATH/abc.xml")
String filecontent = fl.readLines().*trim().join(' ')
package.CLASSNAME.main([filecontent])

Take output of bash command and pass it as command line argument to a c executable (pipes)


By : Ignacio Santiago Per
Date : March 29 2020, 07:55 AM
Hope this helps You need to fork two processes with a pipe between them. Your shell should not try to read from or write to the pipe.
Here's a complete example that hardcodes your pipeline to demonstrate how to set it up:
code :
#include <stdio.h>
#include <unistd.h>
#include <sys/wait.h>

int main() {
  char* producer="pwd";
  char* consumer="./show";
  int fds[2];

  printf("Going to run the equivalent of '%s | %s'\n", producer, consumer);
  // Create a child that will become the consumer
  if (!fork()) {
    pipe(fds);
    // Create another child to be the producer
    if(!fork()) {
      // Set up stdout to be the pipe
      dup2(fds[1], 1);
      close(fds[0]);
      close(fds[1]);
      // Execute the producer
      execlp(producer, producer, NULL);
    } else {
      // Set up stdin to be the pipe
      dup2(fds[0], 0);
      close(fds[0]);
      close(fds[1]);
      // Execute the consumer
      execlp(consumer, consumer, NULL);
    }
  }
  // Wait for the consumer to finish
  wait(NULL);
  printf("The pipeline is done, the \"shell\" is exiting\n");
}
#!/bin/sh
echo "Here's the data $0 read: $(cat)"
$ pwd
/tmp

$ pwd | ./show
Here's the data ./show read: /tmp
$ gcc foo.c -o foo && ./foo
Going to run the equivalent of 'pwd | ./show'
Here's the data ./show read: /tmp
The pipeline is done, the "shell" is exiting

How to pass linux command to bash execution as command line argument?


By : user3185522
Date : March 29 2020, 07:55 AM
hop of those help? Please, don't be too much strict to my question and even it's a structure (maybe I have structured the sentence in a wrong way), as I am learning bash scripting. So the goal is to pass variable, which on his turn is another command (eg. ls -l | wc -l), to script execution. To pretend this is my command from my terminal , Surround your variable with backtick ` :
code :
./variables.sh `ls -l | wc -l`
./variables.sh $(ls -l | wc -l)

Create a pod with specified name using kubectl in command line?


By : user3475228
Date : March 29 2020, 07:55 AM
With these it helps kubectl run creates a Deployment by default. A Deployment starts a ReplicaSet that manages the pods/replicas... and therefore has a generated pod name.
Run pod
code :
kubectl run mypod --restart=Never --image=imageX
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