Ansible: 여러개의 리모트 머신에 일괄로 명령을 실행하기 위한 툴. 여러개의 리모트 머신들에게 SSH 세션을 열고, 명령어를 입력하는 등의 관리 과정을 코드로 자동화할 수 있음.

• Getting started
  • Control node, Managed node
• Terminology
  • playbook: A list of plays
    • facts: data gathered about managed node
    • become: privilege escalation
    • become_method: sudo or su
    • state: present(installed), latest, absent(removed)
  • play: An ordered list of tasks
  • task: A reference to a single module that defines the operations that Ansible performs.
• Inventory
  • Building a inventory
• Configuration
  • ansible configuration keywords
• Playbook
  • playbook, playbook keywords
  • playbook command options

1. 블록체인 노드 로그 관리

로그

작업2. 데이터 파일 백업

백업

문제해결

1. 문제: Failed to connect to the host via ssh: WARNING: UNPROTECTED PRIVATE KEY FILE! : Permission denied (publickey).
   1. 해결
2. 문제: [WARNING]: Platform linux on host BOOTNODE is using the discovered Python interpreter at /usr/bin/python3.9, but future installation of another Python interpreter could change the meaning of that path. See https://docs.ansible.com/ansible-core/2.17/reference_appendices/interpreter_discovery.html for more

information.

1. 해결
2. 문제: fatal: [NODE2]: UNREACHABLE! => {"changed": false, "msg": "Failed to connect to the host via ssh: Host key verification failed.", "unreachable": true}
   1. 해결
3. 문제: missing newline before EOF (/etc/cron.d/$FILENAME) upload failed: ./ to s3://bucketname/ Parameter validation failed: Invalid length for parameter Key, value: 0, valid min length: 1
   1. 해결