Gitlab_ansible_jenkins三剑客③Ansible的安装及使用

一台服务器可能会安装不同的python应用，不同的应用可能使用的模块版本不同，如果都安装在同样的环境下容易冲突，为了避免冲突，引入virtualenv 这个包管理工具进行环境的隔离

使用pip安装之前需要配置代理(没有使用代理的不用配置)

# 因为有代理，需要设置

export http_proxy=http://10.11.0.148:808

export https_proxy=http://10.11.0.148:808

export ftp_proxy=http://10.11.0.148:808

ansible的环境安装

# root用户下安装依赖

[root@node1 ~]# yum install -y git nss curl

下载安装包：

[root@node1 ~]# wget http://www.python.org/ftp/python/3.6.5/Python-3.6.5.tar.xz

[root@node1 ~]# tar xf Python-3.6.5.tar.xz

[root@node1 ~]# cd Python-3.6.5

[root@node1 Python-3.6.5]# ./configure --prefix=/usr/local/ --with-ensurepip=install --enable-shared LDFLAGS="-Wl,-rpath /usr/local/lib"

[root@node1 Python-3.6.5]# make && make altinstal

将默认的pip替换为pip3.6

[root@node1 Python-3.6.5]# which pip3.6

/usr/local/bin/pip3.6

[root@node1 Python-3.6.5]# ln -s /usr/local/bin/pip3.6 /usr/local/bin/pip

# 安装 virtualenv

[root@node1 Python-3.6.5]# /usr/local/bin/pip3.6 install virtualenv

# 创建运行ansible的用户并进入该用户

[root@node1 Python-3.6.5]# useradd deploy

[root@node1 Python-3.6.5]# su - deploy

[deploy@node1 ~]$

# 创建 python3.6环境下的env环境

[deploy@node1 ~]$ virtualenv -p /usr/local/bin/python3.6 .py3-a2.5-env

[deploy@node1 ~]$ cd /home/deploy/.py3-a2.5-env/

# 安装ansible

[deploy@node1 .py3-a2.5-env]$ export http_proxy=http://10.11.0.148:808

[deploy@node1 .py3-a2.5-env]$ export https_proxy=http://10.11.0.148:808

[deploy@node1 .py3-a2.5-env]$ export ftp_proxy=http://10.11.0.148:808

# 克隆ansible仓库

[deploy@node1 .py3-a2.5-env]$ git clone https://github.com/ansible/ansible.git

# 加载py3-a2.5-env环境

[deploy@node1 .py3-a2.5-env]$ source /home/deploy/.py3-a2.5-env/bin/activate

(.py3-a2.5-env) [deploy@node1 .py3-a2.5-env]$

# 安装依赖包

(.py3-a2.5-env) [deploy@node1 .py3-a2.5-env]$ pip install paramiko PyYAML jinja2

# 切换ansible到2.5版本

(.py3-a2.5-env) [deploy@node1 ~]$ pwd

/home/deploy

(.py3-a2.5-env) [deploy@node1 ~]$ cd .py3-a2.5-env/

(.py3-a2.5-env) [deploy@node1 .py3-a2.5-env]$ ls

ansible bin include lib

(.py3-a2.5-env) [deploy@node1 .py3-a2.5-env]$ cd ansible/

(.py3-a2.5-env) [deploy@node1 ansible]$ git checkout stable-2.5

Branch stable-2.5 set up to track remote branch stable-2.5 from origin.

Switched to a new branch 'stable-2.5'

(.py3-a2.5-env) [deploy@node1 ansible]$ pwd

/home/deploy/.py3-a2.5-env/ansible

# 在子虚拟环境下加载ansible

.py3-a2.5-env) [deploy@node1 ansible]$ source /home/deploy/.py3-a2.5-env/ansible/hacking/env-setup –q

# 验证环境

(.py3-a2.5-env) [deploy@node1 ansible]$ ansible --version

可以看到 python3.6的环境成功安装了ansible2.5，至此独立的ansible环境就搭建好了

ansible的常用方法

配置ansible和目标主机环境

ansible主机:

node1: 10.11.0.210

目标主机：

node2: 10.11.0.212（test.example.com）

# 添加hosts解析

[root@node1 ~]# cat /etc/hosts

10.11.0.212 test.example.com

切换到 deploy用户的ansible环境中

[root@node1 ~]# su - deploy

Last login: Wed Mar 13 20:42:04 CST 2019 on pts/2

[deploy@node1 ~]$ source .py3-a2.5-env/bin/activate

(.py3-a2.5-env) [deploy@node1 ~]$ source .py3-a2.5-env/ansible/hacking/env-setup -q

# 看环境是否正常

(.py3-a2.5-env) [deploy@node1 ~]$ ansible-playbook --version

ansible-playbook 2.5.15 (stable-2.5 5cbf1bfa03) last updated 2019/03/13 20:44:34 (GMT +800)

config file = None

configured module search path = ['/home/deploy/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']

ansible python module location = /home/deploy/.py3-a2.5-env/ansible/lib/ansible

executable location = /home/deploy/.py3-a2.5-env/ansible/bin/ansible-playbook

python version = 3.6.5 (default, Mar 13 2019, 20:08:53) [GCC 4.8.5 20150623 (Red Hat 4.8.5-28)]

# 搭建playbooks框架

(.py3-a2.5-env) [deploy@node1 ~]$

(.py3-a2.5-env) [deploy@node1 ~]$ mkdir test_playbooks

(.py3-a2.5-env) [deploy@node1 ~]$ cd test_playbooks/

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ mkdir inventory

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ mkdir roles

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ cd inventory

(.py3-a2.5-env) [deploy@node1 inventory]$ vim testenv

(.py3-a2.5-env) [deploy@node1 inventory]$ cat testenv

[testservers]

test.example.com

[testserers:vars]

server_name=test.example.com

user=root

output=/root/test.txt

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ tree .

├── deploy.yml

├── inventory

│ └── testenv

└── roles

└── testbox

└── tasks

└── main.yml

4 directories, 3 files

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ ssh-keygen -t rsa

Generating public/private rsa key pair.

Enter file in which to save the key (/home/deploy/.ssh/id_rsa):

Created directory '/home/deploy/.ssh'.

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Your identification has been saved in /home/deploy/.ssh/id_rsa.

Your public key has been saved in /home/deploy/.ssh/id_rsa.pub.

The key fingerprint is:

SHA256:OezEOxKL6z0hf/XMYZ2cvnLp55kGasvDJdj3OqV74N4 deploy@node1

The key's randomart image is:

+---[RSA 2048]----+

| |

| o . |

| . S o o o |

| ...= +.oo==. |

| .oo.+..=*o*. |

| oo....==+=++|

| .o .o .o+BOE.|

+----[SHA256]-----+

# 建立ansible和目标机器的免秘钥认证

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ ssh-copy-id -i /home/deploy/.ssh/id_rsa.pub root@test.example.com

/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/home/deploy/.ssh/id_rsa.pub"

The authenticity of host 'test.example.com (10.11.0.212)' can't be established.

ECDSA key fingerprint is SHA256:Q2YUBNf0DmqBgD9wso2dXiVhKZmJjwBnW08ul4o05ag.

ECDSA key fingerprint is MD5:e8:26:81:0d:0a:2e:62:33:d9:9f:dc:a1:a3:9c:6e:83.

Are you sure you want to continue connecting (yes/no)? yes

/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed

/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys

root@test.example.com's password:

Number of key(s) added: 1

Now try logging into the machine, with: "ssh 'root@test.example.com'"

and check to make sure that only the key(s) you wanted were added.

# 验证能否免密码登录远程主机

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ ssh root@test.example.com

Last login: Fri Mar 8 19:22:58 2019 from 10.11.0.148

[root@node02 ~]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

valid_lft forever preferred_lft forever

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether 00:0c:29:2c:b7:df brd ff:ff:ff:ff:ff:ff

inet 10.11.0.212/8 brd 10.255.255.255 scope global noprefixroute eth0

valid_lft forever preferred_lft forever

inet6 fe80::2734:eea:a47a:b02/64 scope link noprefixroute

valid_lft forever preferred_lft forever

# 定义相关的变量和脚本

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ tree

├── deploy.yml

├── inventory

│ └── testenv

└── roles

└── testbox

└── tasks

└── main.yml

4 directories, 3 files

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ pwd

/home/deploy/test_playbooks

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ tree

├── deploy.yml

├── inventory

│ └── testenv

└── roles

└── testbox

└── tasks

└── main.yml

4 directories, 3 files

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ cat roles/testbox/tasks/main.yml

- name: Print server name and username to remote testbox

shell: "echo 'Currently {{ user }} is logining {{ server_name }}' > {{ output }}"

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ cat inventory/testenv

[testservers]

test.example.com

[testservers:vars]

server_name=test.example.com

user=root

output=/root/test.txt

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ cat deploy.yml

- hosts: "testservers"

gather_facts: true

remote_user: root

roles:

- testbox

(.py3-a2.5-env) [deploy@node1 test_playbooks]$

# 执行playbook

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ ansible-playbook -i inventory/testenv ./deploy.yml

PLAY [testservers] **************************************************************************************************************************************************************

TASK [Gathering Facts] **********************************************************************************************************************************************************

ok: [test.example.com]

TASK [testbox : Print server name and username to remote testbox] ***************************************************************************************************************

changed: [test.example.com]

PLAY RECAP **********************************************************************************************************************************************************************

test.example.com : ok=2 changed=1 unreachable=0 failed=0

(.py3-a2.5-env) [deploy@node1 test_playbooks]$

# 登录远程主机验证是否正确执行

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ ssh root@test.example.com

Last login: Thu Mar 14 20:07:01 2019 from node1

[root@node02 ~]# ls

anaconda-ks.cfg test.txt

[root@node02 ~]# cat test.txt

Currently root is logining test.example.com

实战操作

# 进入ansible环境

[root@node1 ~]# su - deploy

Last login: Thu Mar 14 19:17:02 CST 2019 on pts/0

[deploy@node1 ~]$ source .py3-a2.5-env/bin/activate

(.py3-a2.5-env) [deploy@node1 ~]$ source .py3-a2.5-env/ansible/hacking/env-setup -q

(.py3-a2.5-env) [deploy@node1 ~]$ ansible-playbook --version

ansible-playbook 2.5.15 (stable-2.5 5cbf1bfa03) last updated 2019/03/13 20:44:34 (GMT +800)

config file = None

configured module search path = ['/home/deploy/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']

ansible python module location = /home/deploy/.py3-a2.5-env/ansible/lib/ansible

executable location = /home/deploy/.py3-a2.5-env/ansible/bin/ansible-playbook

python version = 3.6.5 (default, Mar 13 2019, 20:08:53) [GCC 4.8.5 20150623 (Red Hat 4.8.5-28)]

# 远程主机的操作

(.py3-a2.5-env) [deploy@node1 ~]$ ssh root@test.example.com

Last login: Mon Mar 18 19:41:46 2019 from 10.11.0.148

[root@node02 ~]# useradd foo

[root@node02 ~]# useradd deploy

[root@node02 ~]# mkdir /etc/nginx

[root@node02 ~]# rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm

1.创建文件的操作

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ cat roles/testbox/tasks/main.yml

- name: Print server name and username to remote testbox

shell: "echo 'Currently {{ user }} is logining {{ server_name }}' > {{ output }}"

- name: create a file

file: 'path=/root/foo.txt state=touch mode=0755 owner=foo group=foo'

# 看到可以成功执行

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ ansible-playbook -i inventory/testenv ./deploy.yml

PLAY [testservers] **********************************************************************************************************************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************************************************************************************

ok: [test.example.com]

TASK [testbox : Print server name and username to remote testbox] ***********************************************************************************************************************************************

changed: [test.example.com]

TASK [testbox : create a file] **********************************************************************************************************************************************************************************

changed: [test.example.com]

PLAY RECAP ******************************************************************************************************************************************************************************************************

test.example.com : ok=3 changed=2 unreachable=0 failed=0

2.copy/stat和debug模块的使用

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ mkdir roles/testbox/files

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ vim roles/testbox/files/foo.sh

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ cat roles/testbox/files/foo.sh

echo "this is a test script"

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ vim roles/testbox/tasks/main.yml

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ cat roles/testbox/tasks/main.yml

- name: Print server name and username to remote testbox

shell: "echo 'Currently {{ user }} is logining {{ server_name }}' > {{ output }}"

- name: create a file

file: 'path=/root/foo.txt state=touch mode=0755 owner=foo group=foo'

- name: copy a file

copy: 'remote_src=no src=roles/testbox/files/foo.sh dest=/root/foo.sh mode=0644 force=yes'

- name: check if foo.sh exists

stat: 'path=/root/foo.sh'

- debug: msg="foo.sh exists" # 如果文件存在则输出消息

when: script_stat.stat.exists

# 执行测试

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ ansible-playbook -i inventory/testenv ./deploy.yml

ok: [test.example.com]

changed: [test.example.com]

TASK [testbox : copy a file] ************************************************************************************************************************************************************************************

ok: [test.example.com]

TASK [testbox : check if foo.sh exists] *************************************************************************************************************************************************************************

ok: [test.example.com]

TASK [testbox : debug] ******************************************************************************************************************************************************************************************

ok: [test.example.com] => {

"msg": "foo.sh exists"

}

test.example.com : ok=6 changed=2 unreachable=0 failed=0

3.执行脚本

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ cat roles/testbox/tasks/main.yml

- name: Print server name and username to remote testbox

shell: "echo 'Currently {{ user }} is logining {{ server_name }}' > {{ output }}"

- name: create a file

file: 'path=/root/foo.txt state=touch mode=0755 owner=foo group=foo'

- name: copy a file

copy: 'remote_src=no src=roles/testbox/files/foo.sh dest=/root/foo.sh mode=0644 force=yes'

- name: check if foo.sh exists

stat: 'path=/root/foo.sh'

- debug: msg="foo.sh exists"

when: script_stat.stat.exists

- name: run the script

command: 'sh /root/foo.sh'

4.变量和jija模板的使用

# a.编辑变量

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ cat inventory/testenv

[testservers]

test.example.com

[testservers:vars]

server_name=test.example.com

user=root

output=/root/test.txt

server_name=test.example.com

port=80

user=deploy

worker_processes=4

max_open_file=65505

root=/www

# b.编辑nginx的jija模板

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ mkdir roles/testbox/templates

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ cat roles/testbox/templates/nginx.conf.j2

# For more infomation on configuration, see:

user {{ user }};

worker_processes {{ worker_processes }};

error_log /var/log/nginx/error.log;

pid /var/run/nginx.pid;

worker_rlimit_nofile 65535;

events {

worker_connections {{ max_open_file }};

}

http {

include /etc/nginx/mime.types;

default_type application/octet-stream;

log_format main '$remote_addr - $remote_user [$time_local] "$request" '

'$status $body_bytes_sent "$http_referer" '

'"$http_user_agent" "$http_x_forwarded_for"';

access_log /var/log/nginx/access.log main;

sendfile on;

#tcp_nodelay on;

#keepalive_timeout 0;

keepalive_timeout 65;

gzip on;

#include vhost.d/*.conf;

server {

listen {{ port }} default_server;

server_name {{ server_name }};

#charset koi8-r;

#access_log logs/host.access.log main;

location / {

root {{ root }};

index index.html index.htm;

}

#error_page 404 /404.html;

# redirect server error pages to the static page /50x.html

error_page 500 502 503 504 /50x.html;

location = /50x.html {

root html;

}

# 执行测试

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ ansible-playbook -i inventory/testenv ./deploy.yml

ok: [test.example.com]

changed: [test.example.com]

ok: [test.example.com]

ok: [test.example.com] => {

"msg": "foo.sh exists"

}

TASK [testbox : run the script] *********************************************************************************************************************************************************************************

changed: [test.example.com]

TASK [testbox : write the nginx config file] ********************************************************************************************************************************************************************

changed: [test.example.com]

TASK [testbox : ensure nginx is at the latest version] **********************************************************************************************************************************************************

ok: [test.example.com]

TASK [testbox : start nginx service] ****************************************************************************************************************************************************************************

changed: [test.example.com]

test.example.com : ok=10 changed=5 unreachable=0 failed=0

# 验证，远程nginx服务是否正常启动

(.py3-a2.5-env) [deploy@node1 test_playbooks]$ ssh root@test.example.com "ps -ef|grep nginx"

root 15637 1 0 20:36 ? 00:00:00 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf

deploy 15638 15637 0 20:36 ? 00:00:00 nginx: worker process

deploy 15639 15637 0 20:36 ? 00:00:00 nginx: worker process

deploy 15640 15637 0 20:36 ? 00:00:00 nginx: worker process

deploy 15641 15637 0 20:36 ? 00:00:00 nginx: worker process

root 15687 15685 0 20:48 ? 00:00:00 bash -c ps -ef|grep nginx

root 15695 15687 0 20:48 ? 00:00:00 grep nginx

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