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Install K8S on VM and spring boot integration.

Installation Environment Vmware Workstation pro  It is recommended to use the  snapshot  to store the state of each installation stage to avoid installation failures and causing the installation to start from scratch. Ubuntu 22.04 windows 11 Hardware settings  create 3 VM: 4 cores and 4G memory and 100G capacity Before installing K8s (All use the root user) set host: 192.168.47.135 master 192.168.47.131 node1 192.168.47.132 node2 set root ssh connection: sudo su - echo "PermitRootLogin yes" >> /etc/ssh/sshd_config systemctl restart sshd sudo passwd ssh-keygen for i in {master,node1,node2}; do  ssh-copy-id root@$i; done set Ipvs and conf  create conf file: for i in {master,node1,node2}; do ssh root@$i 'cat << EOF > /etc/modules-load.d/containerd.conf overlay br_netfilter EOF'; done execute conf: for i in {master,node1,node2}; do ssh root@$i 'modprobe overlay;modprobe br_netfilter;'; done create 99-kubernetes-cri.conf file: for i in {maste...
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Process

A process is a program that is executed in memory.

Process layout

A process includes:

  • Code segment.
  • Data section-global variables.
  • Stack-temporary local variables and functions.
  • Heap-dynamic allocated variables or classes.
  • Current activity(program counter, register contents).
  • A set of associated resources.


Process status



Process control block

A process control block (PCB) is the kernel data structure that represents a process in an operating system.  Context switch means the kernel saves the state of the old process and loads the saved state for the new process.
  • Process state.
  • Program counter.
  • Cpu register.
  • Cou scheduling.
  • Memory-management information.
  • I/O status information.
  • Accounting information.




Process Schedulers

  • Short-term(CPU scheduler)
    • Selects which process should be executed and allocated CPU(ready state -> run state).
  • Long-term(job scheduler)
    • Selects which processes should be loaded into memory and brought into the ready queue(new state -> ready state).
    • Unix/NT: no long-term scheduler.
  • Medium-term
    • Selects which process should be swapped in/out of memory(ready state -> wait state).
    • Replaced by virtual memory.

Process communication methods

  • Shared memory.
  • Message passing.
  • Socket
  • Remote procedure calls

reference:
https://www.amazon.com/-/zh_TW/Operating-System-Concepts-Abraham-Silberschatz/dp/1119800366/ref=sr_1_1?keywords=Operating-System-Concepts&qid=1669538704&s=books&sr=1-1

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Install K8S on VM and spring boot integration.

Installation Environment Vmware Workstation pro  It is recommended to use the  snapshot  to store the state of each installation stage to avoid installation failures and causing the installation to start from scratch. Ubuntu 22.04 windows 11 Hardware settings  create 3 VM: 4 cores and 4G memory and 100G capacity Before installing K8s (All use the root user) set host: 192.168.47.135 master 192.168.47.131 node1 192.168.47.132 node2 set root ssh connection: sudo su - echo "PermitRootLogin yes" >> /etc/ssh/sshd_config systemctl restart sshd sudo passwd ssh-keygen for i in {master,node1,node2}; do  ssh-copy-id root@$i; done set Ipvs and conf  create conf file: for i in {master,node1,node2}; do ssh root@$i 'cat << EOF > /etc/modules-load.d/containerd.conf overlay br_netfilter EOF'; done execute conf: for i in {master,node1,node2}; do ssh root@$i 'modprobe overlay;modprobe br_netfilter;'; done create 99-kubernetes-cri.conf file: for i in {maste...
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