第一题、安装和配置ansible
注：所有操作都是在控制节点上操作的；如果在其他配置信息中说明了做了免密登录，但是实际操作时没有发现免密登录，需联系考官
1）考试时，先查看是否提供了ansibe的软件仓库，如果没有提供，需要手动创建（会在其他配置信息中给出仓库的url）
$sudo yum-config-manager --add repo=http://content.example.com/rhel8.0/x86_64/ucfupdates/
$cd /etc/yum.repo
$ sudo vim content.example.com_rhel8.0_x86_64_ucfupdates_.repo
[content.example.com_rhel8.0_x86_64_ucfupdates_]
name=created by dnf config-manager from http://content.example.com/rhel8.0/x86_64/ucfupdates/
baseurl=http://content.example.com/rhel8.0/x86_64/ucfupdates/
enabled=1
gpgcheck=0
$ yum repolist
2）安装ansible
$ sudo yum -y install ansible
$ansible --version
3）创建inventory文件
$kdir ansible
$cd ansible
$vim inventory
node1
node2
node3
node4
node5
[dev]
node1
[test]
node2
[prod]
node3
node4
[balancers]
node5
[webservers:children]
prod
4）检查
$ansible -i inventory dev --list-hosts
$ansible -i inventory test --list-hosts
$ansible -i inventory prod --list-hosts
$ansible -i inventory balancers --list-hosts
$ansible -i inventory webservices --list-hosts
5）创建ansible配置文件（remote-user是普通用户）
$cd ansible
$vim ansible.cfg
[defaults]
inventory = /home/greg/ansible/inventory
remote_user = greg
ask_pass = false
roles_path = /home/greg/ansible/roles
[privilege_escalation]
become = yes
become_method = sudo
become_user = root
become_ask_pass = false
注：首先要确保被管理节点上做了免密登录，即
$ssh root@node1
#vim /etcsydoers
greg ALL=(ALL) NOPASSWD: ALL
6）检测提权是否成功
$ansible all -a "id" #看到root表示提权成功
7）创建ansible配置文件（remote-user是root用户）
注：root用户没有做免密登录
$cd ansible
$vi ansible.cfg
[defaults]
inventory = /home/greg/ansible/inventory
remote_user = root
roles_path = /home/greg/ansible/roles
$cd ansible
$mkdir group_vars
$vim all
ansible_ssh_pass: redhat #设置变量，被管理主机root密码为redhat
$vim ansible/inventory
node1
node2
node3
node4
node5
[dev]
node1
[test]
node2
[prod]
node3
node4
[balancers]
node5
[webservers:children]
prod
[all:vars]
ansible_ssh_pass = redhat
第二题、创建和运行ansible的临时命令
说明：本题为使用yum_repository的模块，设置软件仓库
1）查看yum_repository模块的写法
$ansible-doc yum_repository
2）编辑脚本
$cd ansible
$vim adhoc.sh
#!/bin/bash
ansible all -m yum_repository -a 'name="EX294_BASE" description="EX294 base software" baseurl="http://repo.domainx.example.com/BaseOS" gpgcheck=yes gpgkey="http://repo.domainx.example.com/RPM-GPG-KEY-redhat-release"'
ansible all -m yum_repository -a 'name="EX294_STREAM" description="EX294 stream software" baseurl="http://repo.domainx.example.com/AppStream" gpgcheck=yes gpgkey="http://repo.domainx.example.com/RPM-GPG-KEY-redhat-release"'
3）脚本执行
$chmod +x adhoc.sh
$ansible all -a "yum repolist" #执行脚本前查看软件仓库
$./adhoc.sh
$ansible all -a "yum repolist" #
第三题、安装软件包
1）编辑
$cd ansible
$vim packages.yml
---
- name: install pkg
hosts: dev,test,prod
tasks:
- name: use yum install
yum:
name:
- php
- mariadb
state: latest
- name: install pkg
hosts: dev
tasks:
- name: use yum module
yum:
name: "@RPM Development Tools"
state: latest
- name: use yum module
yum:
name: "*"
state: latest
2）检查
$ansible-playbook packages.yml
$ansible dev,test,prod -m shell -a 'rpm -qa|grep php'
$ansible dev,test,prod -m shell -a 'rpm -qa|grep mariadb'
$ansible dev,test,prod -m shell -a 'yum group list'
四、使用RHEL系统角色
1）安装role软件包
$yum list |grep role
$sudo yum install -y rhel-system-roles
2）修改ansible配置文件(在roles_path中添加role的路径)
$cd ansible
$cat ansible.cfg
[defaults]
inventory = /home/greg/ansible/inventory
remote_user = greg
ask_pass = false
roles_path = /home/greg/ansible/roles:/usr/share/ansible/roles
[privilege_escalation]
become = yes
become_method = sudo
become_user = root
become_ask_pass = false
3）查看roles
$ansible-galaxy list
4）编辑playbook
$cat timesync.yml
---
- name: use system role
hosts: all
vars:
timesync_ntp_servers:
- hostname: 172.25.254.254
iburst: yes
roles:
- rhel-system-roles.timesync
5）运行playbook并检查
$ansible all -a 'chronyc sources'
$ansible-playbook timesync.yml
$ansible all -a 'chronyc sources'
$ansible all -m shell -a "grep -i iburst /etc/chrony.conf"
补充题、编辑selinux.yml
$cd ansible
$vim selinux.yml
---
- name: set selinux
hosts: all
vars:
selinux_policy: targeted
selinux_state: enforcing
roles:
- rhel-system-roles.selinux
五、使用Ansible Galaxy安装角色
1）编辑playbook
$cd ansible
$vim requirements.yml
- src: http://rhgls.domainx.example.com/materials/haproxy.tar
name: balancer
- src: http://rhgls.domainx.example.com/materials/phpinfo.tar
name: phpinfo
2）运行playbook并检查
$ansible-galaxy list
$ls roles
$ansible-galaxy install -r ./requirements.yml
$ansible-galaxy list
$ls roles
3）文件拷贝
cp /home/greg/ansible/requirements.yml /home/greg/ansible/roles/requirements.yml
六、创建一个web role
1）创建名为apache的role
$cd ansible
$cd role
$ansible-galaxy init apache
$ls
$cd ..
$ansible-galaxy list
2）创建index.html.j2文件
$vim roles/apache/templates/index.html.j2
Welcome to {{ ansible_fqdn }} on {{ ansible_default_ipv4.address }}
3）编辑playbook文件
$vim roles/apache/tasks/main.yml
- name: install pkg
yum:
name: httpd
state: latest
- name: set httpd service
service:
name: httpd
state: started
enabled: yes
- name: set firewalld service
service:
name: firewalld
state: started
enabled: yes
- name: set firewalld to allow http traffic
firewalld:
service: http
immediate: yes
permanent: yes
state: enabled
- name: set web content
template:
src: index.html.j2
dest: /var/www/html/index.html
4）编辑apache.yml
$cd ansible
$vim apache.yml
---
- name: use apache role
hosts: webservers
roles:
- apache
5）运行apache.yml
$ansible-playbook apache.yml
6）测试
$curl node3
$curl node4
七、从Ansible Gagaly使用角色
1）编辑roles.yml
$cd ansible
vim roles.yml
---
- name: use phpinfo role
hosts: webservers
roles:
- phpinfo
- name: use haproxy role
hosts: balancers
roles:
- balancer
tasks:
- firewalld:
service: http
immediate: yes
permanent: yes
state: enabled
2）运行roles.yml
$ansible-playbook roles.yml
3）检查
$curl node5
$curl node5
$curl node3.domainx.example.com/hello.php
$curl node4.domainx.example.com/hello.php
八、创建和使用逻辑卷
1）查看各节点卷组大小
$ansible all -a "vgs"
2）创建playbook
$cd ansible
$vim lv.yml
---
- name: all
hosts: all
tasks:
- block:
- lvol:
vg: research
lv: data
size: 1500
- filesystem:
dev: /dev/research/data
fstype: ext4
rescue:
- debug:
msg: "Could not create logical volume of that size"
when: ansible_lvm.vgs.research is defined
- lvol:
vg: research
lv: data
size: 800
when: ansible_lvm.vgs.research is defined
- filesystem:
dev: /dev/research/data
fstype: ext4
when: ansible_lvm.vgs.research is defined
- debug:
msg: "Volume group does not exist"
when: ansible_lvm.vgs.research is undefined
3）执行playbook并检查
$ansible all -a "lvs"
$ansible-playbook lv.yml
$ansible all -a "lvs"
九、生成主机文件
1）编写j2模板
$cd ansible
vim hosts.j2
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
{% for host in groups.all %}
{{ hostvars[host].ansible_default_ipv4.address }} {{ hostvars[host].ansible_fqdn }} {{ hostvars[host]['ansible_hostname'] }}
{% endfor %}
2）编写playbook
$cd ansible
$vim hosts.yml
---
- name: create a host file
hosts: all
tasks:
- name: template a host file
template:
src: hosts.j2
dest: /etc/myhosts
when: '"dev" in group_names'
3）执行playbook并检查
$ansible-playbook hosts.yml
$ansible all -a 'cat /etc/myhosts'
十、修改文件内容
1）编辑playbook
$cd ansible
$vim issue.yml
---
- name: modify file content
hosts: all
tasks:
- copy:
content: Development
dest: /etc/issue
when: '"dev" in group_names'
- copy:
content: Test
dest: /etc/issue
when: '"test" in group_names'
- copy:
content: Production
dest: /etc/issue
when: '"prod" in group_names'
2）运行并检查
$ansible-playbook issue.yml
$ansible all -a "cat /etc/issue"
十一、创建web内容目录
1）编写playbook
$cd ansible
$vim webcontent.yml
---
- name: set web content
hosts: dev
tasks:
- name: yum install httpd
yum:
name: httpd
state: latest
- name: create directory
file:
path: /webdev
state: directory
group: webdev
mode: "2775"
setype: "httpd_sys_content_t"
- name: create link file
file:
src: /webdev
dest: /var/www/html/webdev
state: link
- name: set content
copy:
content: Development
dest: /webdev/index.html
setype: "httpd_sys_content_t"
- name: set http service
service:
name: httpd
state: started
enabled: yes
- name: set firwalld open
service:
name: firewalld
state: started
enabled: yes
- name: set firewalld
firewalld:
service: http
immediate: yes
permanent: yes
state: enabled
2）运行playbook并检查
$ansible-playbook webcontent.yml
curl http://node1.doaminx.example.com/webdev/
十二、生成硬件报告
1）编辑playbook
$cd ansible
$vim hwreport.yml
---
- name: create a hwreport
hosts: all
vars:
hardware:
- ww: HOST
yy: "{{ ansible_hostname }}"
- ww: MEMORY
yy: "{{ ansible_memtotal_mb }}"
- ww: BIOS
yy: "{{ ansible_bios_version }}"
- ww: DISK_SIZE_VDA
yy: "{{ ansible_devices.vda.size | default('NONE') }}"
- ww: DISK_SIZE_VDB
yy: "{{ ansible_devices.vdb.size | default('NONE') }}"
tasks:
- get_url:
url: http://rhgls.domainx.example.com/materials/hwreport.empty
dest: /root/hwreport.txt
- lineinfile:
path: /root/hwreport.txt
line: "{{ item.ww }}={{ item.yy }}"
regexp: '^{{ item.ww }}='
loop: "{{ hardware }}"
十三、使用Ansible Vault
1）创建加密密码
$cd ansible
$vim secret.txt
whenyouwishuponastar
echo whenyouwishuponastar >>secret.txt
2）编辑yml文件
$vim locker.yml
pw_developer: Imadev
pw_manager: Imamgr
3）加密
$ansible-vault encrypt --vault-id=./secret.txt locker.yml
4）测试
$ansible-vault view --vault-id=./secret.txt locker.yml
十四、创建批量添加用户role
1）编辑playbook
$cd ansible
$vim users.yml
---
- name: create user on dev and test
hosts: dev,test
vars_files:
- locker.yml
- user_list.yml
tasks:
- group:
name: devops
state: present
- user:
name: "{{ item.name }}"
groups: devops
password: "{{ pw_developer | password_hash('sha512','mysecretsalt') }}"
expires: "{{ item.password_expire_MAX }}"
loop: "{{ users }}"
when: item.job == "developer"
- name: create user on prod
hosts: prod
vars_files:
- locker.yml
- user_list.yml
tasks:
- group:
name: opsmgr
state: present
- user:
name: "{{ item.name }}"
password: "{{ pw_manager | password_hash('sha512','mysecretsalt') }}"
groups: opsmgr
uid: 6666
expires: "{{ item.password_expire_MAX }}"
loop: "{{ users }}"
when: item.job == 'manager'
2）执行playbook
$ansible-playbook --vault-id=./secret.txt users.yml
十五、重新设置Ansible Vault密码
1）下载文件
$ wget http://rhgls.domainx.example.com/materials/salaries.yml
2）重新设置密码
$ ansible-vault rekey salaries.yml
Vault password: insecure4sure
New Vault password: bbe2de98389b
3）新密码查看
$ansible-vault view salaries.yml
十六、创建定时任务
$cd ansible
$ vim cron.yml
---
- name: cron
hosts: all
tasks:
- user:
name: natasha
state: present
- cron:
user: natasha
job: 'Logger "EX294 in progress"'
minute: "*/2"
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