mha node init

ANSIBLE/DBMS/MHA/NODE/README.md

+[![logo](https://www.hongsnet.net/images/logo.gif)](https://www.hongsnet.net)
+
+# Ansible을 이용한 MHA Node 구성 및 설치
+
+> MHA Node가 추가될 경우 구성 및 설치를 자동화 한다.
+
+
+## Inventory 설정
+
+```bash
+# cat hosts
+[ALL_HOSTS]
+172.16.0.100 managed_ip=172.16.0.100 des="2020-12-03"
+
+[ALL_HOSTS_OK]
+```
+
+대상 호스트는 172.16.0.100이며, 추가는 2020-12-03에 수행한다. 참고적으로 **ALL_HOSTS_OK** 호스트 그룹은 작업이 완료된 호스트의 history를 위한 그룹이다.
+
+
+## Host Variables 설정
+
+```bash
+# cat host_vars/172.16.0.100
+ansible_ssh_host: 172.16.0.100
+ansible_ssh_port: SSH_포트번호
+ansible_ssh_user: 사용자 아이디
+ansible_ssh_pass: "사용자 패스워드"
+ansible_become: yes
+ansible_become_method: su
+ansible_become_user: root
+ansible_become_pass: "!root_패스워드"
+ansible_python_interpreter: python2.7
+```
+
+## Playbook 설정
+
+- **SSH RSA Key 인증 수행**
+
+```python
+---
+- name: MHA Pre-Requirement Working
+  hosts: ALL_HOSTS
+  vars:
+    user_name: 'mhauser'
+    user_password: '패스워드'
+    new_user0: 'AllowUsers mhauser@172.16.0.100'
+    new_user1: 'AllowUsers mhauser@172.16.0.200'
+    new_user2: 'AllowUsers mhauser@172.16.0.201'
+    new_user3: 'AllowUsers mhauser@172.16.0.202'
+  tasks:
+   - name: mysql Group Add
+     group:
+       name: mysql
+       state: present
+
+   - name: MHA User Add
+     user:
+        name: "mhauser"
+        password: "{{ user_password | password_hash('sha512') }}"
+        shell: /bin/bash
+        home: /MHA
+
+   - name: User Add mysql Group
+     shell: usermod -G mysql {{ user_name }}
+
+   - name: MHA Manager Requirement Direcotry Check
+     stat:
+       path: "{{ item }}"
+     with_items:
+       ['/MHA/conf', '/MHA/script', '/MHA/log' ]
+     register: mha_manager_directory_check
+
+   - name: MHA Manager Requirement Directorys Making
+     command: "{{ item }}"
+     with_items:
+        - mkdir -p /MHA/conf
+        - mkdir -p /MHA/script
+        - mkdir -p /MHA/log
+        - chown -R mhauser.mysql /MHA
+     when: mha_manager_directory_check == False
+
+   - name: /etc/ssh/sshd_config AllowUsers Adding
+     lineinfile:
+        path: /etc/ssh/sshd_config
+        line: "{{ item }}"
+        insertafter: EOF
+     with_items:
+       - "{{ new_user0 }}"
+       - "{{ new_user1 }}"
+       - "{{ new_user2 }}"
+       - "{{ new_user3 }}"
+
+   - name: ssh-keygen Local to Remote
+     command: "ssh-keygen -b 2048 -t rsa -f /MHA/.ssh/id_rsa.pub -q -N ''"
+     run_once: true
+
+   - name: Remote Import id_rsa.pub
+     command: "cat /MHA/.ssh/id_rsa.pub"
+     register: ssh_rsa_pub
+     run_once: true
+
+   - name: Remote SSH Directory Create
+     file:
+       path: /MHA/.ssh
+       state: directory
+       mode: '0700'
+
+   - name: Remote SSH authorized_keys file touch
+     file:
+       path: /MHA/.ssh/authorized_keys
+       state: touch
+       mode: '0600'
+
+   - name: Remote Node Add authrized keys
+     lineinfile:
+       dest: /MHA/.ssh/authorized_keys
+       line: "{{ ssh_rsa_pub.stdout }}"
+```
+
+- **MHA Node 구성**
+
+```python
+---
+- name: MHA Node Installer(Debian Based)
+  hosts: MHA_NODE
+  vars:
+    time: "{{lookup('pipe','date \"+%Y%m%d_%H%M\"')}}"
+    new_user0: 'AllowUsers mhauser@172.16.0.100'
+    new_user1: 'AllowUsers mhauser@172.16.0.200'
+    new_user2: 'AllowUsers mhauser@172.16.0.201'
+    new_user3: 'AllowUsers mhauser@172.16.0.202'
+  environment:
+    LANG: ko_KR.UTF-8
+  tasks:
+   - name: MHA Node tar file Upload
+     copy:
+       src: "templates/mha4mysql-node-0.57.tar.gz"
+       dest: "/root/mha"
+       owner: 'root'
+       group: 'root'
+       mode: 0644
+
+   - name: Install a list of packages
+     apt:
+       pkg:
+         - sudo
+         - libmodule-install-perl
+         - libdbd-mysql-perl
+         - arping
+       update_cache: yes
+
+   - name: /etc/ssh/sshd_config AllowUsers Adding
+     lineinfile:
+        path: /etc/ssh/sshd_config
+        line: "{{ item }}"
+        insertafter: EOF
+     with_items:
+       - "{{ new_user0 }}"
+       - "{{ new_user1 }}"
+       - "{{ new_user2 }}"
+       - "{{ new_user3 }}"
+
+   - name: MHA Node File Unarchive
+     unarchive:
+        src: "/root/mha/mha4mysql-node-0.57.tar.gz"
+        dest: "/root/mha/"
+        remote_src: yes
+
+   - name: MHA Node compile binary Check
+     stat:
+       path: "/usr/local/bin/apply_diff_relay_logs"
+     register: mha_node_binary
+
+   - name: Compiling MHA Node
+     shell: "{{ item }}"
+     args:
+       chdir: "/root/mha/mha4mysql-node-0.57"
+     with_items:
+        - perl Makefile.PL
+        - make
+        - make install
+     when: not mha_node_binary.stat.exists
+
+   - name: MHA Node file Remove
+     file:
+       path: "{{ item }}"
+       state: absent
+     with_items:
+        - /root/mha/mha4mysql-node-0.57.tar.gz
+        - /root/mha/mha4mysql-node-0.57
+
+```
+
+`MHA Node 설치`에 대한 Playbook 분석
+
+* [ ] MHA Node 설치 패키지의 업로드를 수행한다. 단, 파일이 존재할 경우는 Skip 한다.
+* [ ] MHA의 복잡한 작업인 SSH RSA 키기반 인증을 먼저 수행한 후 Node 설치를 진행해야 한다.
+
+
+## playbook 실행
+
+```bash
+# ansible-playbook -i hosts mha_node_install.yml
+```