Installation and upgrade

Review frequently encountered installation and upgrade errors.

• Installation hangs or fails
  
• The etcd component fails to start
  
• Failure to connect through ssh
  
• Failure to create containers
  
• Kubelet container fails to start
  
• DNS server validation fails
  
• The nginx ingress controller does not start
  
• Pods fail to initialize
  
• Installation fails when firewalld is enabled
  
• Heapster remains in an unhealthy state
  
• Ingress controller reported: epoll_create() failed
  
• Pods fail with CrashLoopBackOff
  
• Replacing a master node
  
• manifest-tool command not found
  
• Failure when adding Vulnerability Advisor (VA) node
  
• Disable custom-metrics-adapter service when disabling monitoring service during IBM Cloud Private installation
  
• etcd maintenance
  
• Tiller cannot communicate with Helm-API when on different master nodes
  
• Transferring roles from the master node