title: How to make existing configmaps use kubernetes secrets
body: <p>I am a newbie to kubernetes and I have to implement kubernetes secrets for existing configmaps with passwords hardcorded.</p>
  
  <p>I have 2 configmaps for each pod, 1 settings.yaml and other settings_override.yaml. I have to make override file read environment variables where I have kept base64 secrets. 
  I have created secrets and can see them in pods after printenv. </p>
  
  <p>Kindly suggest me how can I make my settings_override.yaml file read these environment secrets.</p>
  
  <p>Note: if I just remove the key:value pair from settings_override.yaml file then it is picking value from settings.yaml but not from my env variable. </p>
  
  <p>Settings and setting_override file for reference:</p>
  
  <p><code>apiVersion: v1 
   data: setting.json: | { 
   "test": { 
   "testpswd": "test123",
   "testPort": "123", 
    }, 
   }</code></p>
  
  <p><code>apiVersion: v1 
   data: setting_override.json: | { 
  "test": { 
  "testpswd": "test456", 
  "testPort": "456", 
  }, 
  }</code></p>