My Experiments for Truth.

VM vs LXC ########## The main difference between the VMs and Containers is that virtual machines require their own kernel instance to run while  containers  share the same kernel. In other words,  containers  are virtualization at operating-system-level whereas  VMs  are virtualization at the hardware level. In virtual Machines each Guest OS will have its own Operating System and kernel. But in the case of LXC Containers the Guest OS will share the same OS of its Host machine. LXC vs Docker ############# LXC is a container technology that gives us the lightweight Linux containers and Docker is single application virtualisation which is based on top of the containerd Run time engine.. Thus even though based on container utilisation they may sound similar but they are completely different when it comes to usage. Unlike the lightweight LXC containers, docker does not tend to behave lightweight VM’s. Single application restriction of the docker is strictly by the design We can easily log o

 What is Secrets in K8s? Secrets are used to store sensitive information like Authentication Token, Passwords, SSH Keys and  Certificates. It is stored in etcd, datastore of k8s. The main advantage of the secret is that it can be updated dynamically , so if we want to change the username or password or ssh key of any of the containers inside the pod, then just changing the secret will dynamically update the existing and newely created POD's env values and ssh-key (mount as volume) . jinojosep@cloudshell:~ (boreal-physics-256910)$ kubectl create secret generic secret-demo --from-literal=username=jinouname --from-literal=password=jinomypassword secret/secret-demo created ################################ jinojosep@cloudshell:~ (boreal-physics-256910)$ kg secret NAME                  TYPE                                  DATA   AGE default-token-l5tmg   kubernetes.io/service-account-token   3      14m secret-demo           Opaque                                2      8s ###############