Saltstack自动化扩容

一. etcd服务的安装和使用

1.安装etcd应用:

wget https://github.com/coreos/etcd/releases/download/v2.2.5/etcd-v2.2.5-linux-amd64.tar.gz -O etcd-v2.2.5-linux-amd64.tar.gz
tar -zxvf etcd-v2.2.5-linux-amd64.tar.g
cp etcd etcdctl /usr/local/bin/

2.启动etcd服务:

mkdir -p /data/etcd    #创建数据存储目录
nohup etcd -name auto_scale --data-dir /data/etcd/ \
     --listen-peer-urls 'http://172.16.1.211:2380,http://172.16.1.211:7001' \
     --listen-client-urls 'http://172.16.1.211:2379,http://172.16.1.211:4001' \
     --advertise-client-urls 'http://172.16.1.211:2379,http://172.16.1.211:4001' &

3.提交key到etcd中:

curl -s http://172.16.1.211:2379/v2/keys/message -XPUT -d value="hello world" | python -m json.tool   #结果通过python的json模块转义输出,增加可读性。

4.获取刚才提交的key值:

curl -s http://172.16.1.211:2379/v2/keys/message | python -m json.tool

5.删除刚才提交的key:

curl -s http://172.16.1.211:2379/v2/keys/message -XDELETE | python -m json.tool

6.提交带10秒过期时间的key:

curl -s http://172.16.1.211:2379/v2/keys/ttl_use -XPUT -d value="hello world 1" -d ttl=10 | python -m json.tool

二. 实现Salt自动化让Haproxy扩容

1.配置salt的pillar连接etcd:

yum install python-pip 
pip install python-etcd #安装python的etcd包 
vim /etc/salt/master
#底部添加
etcd_pillar_config:
  etcd.host: 172.16.1.211
  etcd.port: 4001

ext_pillar:
  - etcd: etcd_pillar_config root=/salt/haproxy/   #root参数是指定etcd里面的目录

2.测试通过salt获取pillar:

curl -s http://172.16.1.211:2379/v2/keys/salt/haproxy/backend_www_wmj_com/web-node1 -XPUT -d value="172.16.1.213:8080" | python -m json.tool

salt '*' pillar.item

3.让salt模板自动添加haproxy的backend:

vim /srv/salt/prod/cluster/files/haproxy-outside.cfg

#server web-node1  172.16.1.213:8080 check inter 2000 rise 30 fall 15
#使用for循环获取etcd的key值
{% for web,web_ip in pillar.backend_www_wmj_com.iteritems() %} server {{ web }} {{ web_ip }} check inter 2000 rise 30 fall 15 {% endfor %}

4.添加一台haproxy的节点:

curl -s http://172.16.1.211:2379/v2/keys/salt/haproxy/backend_www_wmj_com/web-node3 -XPUT -d value="172.16.1.215:8080" | python -m json.tool
salt '*' state.sls cluster.haproxy-outside env=prod

5.简单的自动化扩容脚本:

#!/bin/bash
create_host(){
        echo "create host"
}
deploy_service(){
        salt '*' state.sls nginx.install env=prod
}
deploy_code(){
        echo "deploy code ok"
}
service_check(){
        STATUS=$(curl -s --head http://172.16.1.213:8080/ | grep '200 OK')
        if [ -n "$STATUS" ];then
                echo "HTTP ok"
        else
                echo "HTTP not ok"
                exit 1
        fi
}
etcd_key(){
        curl -s http://172.16.1.211:2379/v2/keys/salt/haproxy/backend_www_wmj_com/web-node4 -XPUT -d value="172.16.1.213:8080"
}
sync_state(){
        salt '*' state.sls cluster.haproxy-outside env=prod
}
main(){
        create_host
       deploy_service
        deploy_code
        service_check
        etcd_key
        sync_state
}
main

############################################################################################

案例:当nginx的并发达到3000,并持续了一段时间时,通过自动化创建一台虚拟机,部署应用最后添加到集群提供服务:
  zabbix监控(nginx并发量)-------》action-------》创建了一台主机/docker容器-------》部署服务--------》部署应用代码-------》测试状态--------》加入到集群---------》加入监控----------》通知
简单实现上面中的某些步骤:为集群添加一个后端节点以提供服务
为了实现上面功能,这里采用salstack+etcd
安装etcd:
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[root@node1 src]# tar xf etcd-v3.2.9-linux-amd64.tar.gz
cd etcd-v3.2.9-linux-amd64
cp etcd etcdctl /usr/local/bin/

 然后开启etcd集群:

  1、首先创建数据目录:mkdir /data/etcd -p

  2、开启服务:

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nohup etcd --name auto_scale --data-dir /data/etcd/ --listen-peer-urls http://192.168.44.134:2380,http://192.168.44.134:7001 --listen-client-urls http://192.168.44.134:2379,http://192.168.44.134:4001 --advertise-client-urls http://192.168.44.134:2379,http://192.168.44.134:4001 &

 

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[root@node1 ~]# netstat -tunlp|grep etcd
tcp        0      0 192.168.44.134:2379         0.0.0.0:*                   LISTEN      52094/etcd         
tcp        0      0 192.168.44.134:2380         0.0.0.0:*                   LISTEN      52094/etcd         
tcp        0      0 192.168.44.134:7001         0.0.0.0:*                   LISTEN      52094/etcd         
tcp        0      0 192.168.44.134:4001         0.0.0.0:*                   LISTEN      52094/etcd

 1、创建一个key/value

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[root@node1 ~]# curl -s http://192.168.44.134:2379/v2/keys/key1 -XPUT -d value="Hello world"

 2、获取创建的key/value

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[root@node1 ~]# curl -s http://192.168.44.134:2379/v2/keys/salt/haproxy/backend_www/www1

 3、删除创建的key/value

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[root@node1 ~]# curl -s http://192.168.44.134:2379/v2/keys/key1 -XDELETE

 或者将上面的输出结果以json格式输出:

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[root@node1 ~]# curl -s http://192.168.44.134:2379/v2/keys/salt/haproxy/backend_www/www1|python -m json.tool
{
    "action": "get",
    "node": {
        "createdIndex": 9,
        "key": "/salt/haproxy/backend_www/www1",
        "modifiedIndex": 9,
        "value": "192.168.44.134:8080"
    }
}

 将etcd配置在saltstack中,结合使用:

1、首先需要安装依赖包:

  yum install python-pip
  pip install python-etcd
2、将etcd配置在salt中:在master配置文件中设置
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####config etcd
my_etcd_config:
  etcd.host: 192.168.44.134
  etcd.port: 4001
 
ext_pillar:
  - etcd: my_etcd_config root=/salt/haproxy

 3、重启master

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[root@node1 ~]# /etc/init.d/salt-master restart

 

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[root@node1 ~]# salt '*' pillar.items
node2:
    ----------
    backend_www:
        ----------
    zabbix-agent:
        ----------
        Zabbix_Server:
            192.168.44.134
    zabbix-agent-host:
        ----------
        zabbix_host:
            node2

 现在通过添加etcd的key来增加haproxy后端的节点服务器:

1、设置etcd的key
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curl -s http://192.168.44.134:2379/v2/keys/salt/haproxy/backend_www/www1 -XPUT -d value="192.168.44.134:8081"|python -m json.tool

 2、查看pillar

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[root@node1 ~]# salt '*' pillar.items
node1:
    ----------
    backend_www:
        ----------
        www1:
            192.168.44.134:8081

 3、修改haproxy配置文件:vim /srv/salt/prod/cluster/files/haproxy-outside.cfg

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{% for www,www_ip in pillar.backend_www.iteritems() %}
server {{ www }} {{ www_ip }} check inter 1000
{% endfor %}

 4、修改haproxy状态配置文件:vim /srv/salt/prod/cluster/haproxy-outside.sls

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haproxy-service:
  file.managed:
    - name: /etc/haproxy/haproxy.cfg
    - source: salt://cluster/files/haproxy-outside.cfg
    - user: root
    - group: root
    - mode: 644
    - template: jinja         新增一行,使用jinja模板,使用变量

 测试并验证:

由于etcd仅仅只是设置了一个key:
www1:192.168.44.134:8081
所以后端只有一个节点:
现在为haproxy后端新增节点www2和www3:
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[root@node1 ~]# curl -s http://192.168.44.134:2379/v2/keys/salt/haproxy/backend_www/www2 -XPUT -d value="192.168.44.134:8080"|python -m json.tool
{
    "action": "set",
    "node": {
        "createdIndex": 14,
        "key": "/salt/haproxy/backend_www/www2",
        "modifiedIndex": 14,
        "value": "192.168.44.134:8080"
    }
}
[root@node1 ~]# curl -s http://192.168.44.134:2379/v2/keys/salt/haproxy/backend_www/www3 -XPUT -d value="192.168.44.135:8080"|python -m json.tool 
{
    "action": "set",
    "node": {
        "createdIndex": 15,
        "key": "/salt/haproxy/backend_www/www3",
        "modifiedIndex": 15,
        "value": "192.168.44.135:8080"
    }
}

 查看设置的pillar:

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[root@node1 ~]# salt '*' pillar.items
node2:
    ----------
    backend_www:
        ----------
        www1:
            192.168.44.134:8081
        www2:
            192.168.44.134:8080
        www3:
            192.168.44.135:8080

 执行salt状态配置文件:

添加完成后,默认不会进行增加,需要执行状态配置文件(随着配置文件修改会reload服务)
salt '*' state.highstate
然后进行查看节点状态以及个数:
 
###################################################################################################


自动化运维-基于etcd加saltstack的自动化扩容

# tar -xf etcd-v2.2.1-linux-amd64.tar.gz 
# cd etcd-v2.2.1-linux-amd64
# cp etcd etcdctl /usr/local/bin/

查看版本

# etcd --version

创建数据目录

# mkdir -p /data/etcd

后台运行进程

# nohup etcd --name auto_scale --data-dir /data/etcd/ --listen-peer-urls 'http://192.168.3.12:2380,http://192.168.3.12:7001' --listen-client-urls 'http://192.168.3.12:2379,http://192.168.3.12:4001' --advertise-client-urls 'http://192.168.3.12:2379,http://192.168.3.12:4001' &

创建key和value

# curl -s http://192.168.3.12:2379/v2/keys/message -XPUT -d value="hello world" | python -m json.tool

结果

{
"action": "set", 
"node": {
"createdIndex": 5, 
"key": "/message", 
"modifiedIndex": 5, 
"value": "hello world"
}
}

查看key和value

# curl -s http://192.168.3.12:2379/v2/keys/message | python -m json.tool

结果

{
"action": "get", 
"node": {
"createdIndex": 5, 
"key": "/message", 
"modifiedIndex": 5, 
"value": "hello world"
}
}

删除key,可以看到查不到了

# curl -s http://192.168.3.12:2379/v2/keys/message -XDELETE | python -m json.tool

结果

{
"action": "delete", 
"node": {
"createdIndex": 5, 
"key": "/message", 
"modifiedIndex": 6
}, 
"prevNode": {
"createdIndex": 5, 
"key": "/message", 
"modifiedIndex": 5, 
"value": "hello world"
}
}

查看删除

# curl -s http://192.168.3.12:2379/v2/keys/message | python -m json.tool

结果

{
"cause": "/message", 
"errorCode": 100, 
"index": 6, 
"message": "Key not found"
}

建一个只存在25秒的键值,25秒后发现该键值查不到了

# curl -s http://192.168.3.12:2379/v2/keys/ttl_use -XPUT -d value='hello world 1' -d ttl=25 | python -m json.tool

结果

{
"action": "set", 
"node": {
"createdIndex": 9, 
"expiration": "2017-04-18T03:04:54.538607442Z", 
"key": "/ttl_use", 
"modifiedIndex": 9, 
"ttl": 25, 
"value": "hello world 1"
}
}

查看

# curl -s http://192.168.3.12:2379/v2/keys/ttl_use | python -m json.tool

结果

{
"action": "get", 
"node": {
"createdIndex": 9, 
"expiration": "2017-04-18T03:04:54.538607442Z", 
"key": "/ttl_use", 
"modifiedIndex": 9, 
"ttl": 24, 
"value": "hello world 1"
}

编辑salt,修改etcd相关配置

# vim /etc/salt/master
etcd_pillar_config:
etcd.host: 192.168.3.12
etcd.port: 4001

ext_pillar:
- etcd: etcd_pillar_config root=/salt/haproxy/

重启服务

# /etc/init.d/salt-master restart

测试

curl -s http://192.168.3.12:2379/v2/keys/salt/haproxy/backend_www_chinasoft_com/web-node1 -XPUT -d value="192.168.3.12:8080" | python -m json.tool

结果

{
"action": "set", 
"node": {
"createdIndex": 11, 
"key": "/salt/haproxy/backend_www_chinasoft_com/web-node1", 
"modifiedIndex": 11, 
"value": "192.168.3.12:8080"
}

安装etcd

# yum install -y python-pip
# pip search python-etcd
# pip install python-etcd

1)编写haproxy的配置文件

vim /srv/salt/prod/cluster/files/haproxy-outside.cfg

balance roundrobin {
% for web,web_ip in pillar.backend_www_chinasoft_com.iteritems() -%} server {{ web }} {{ web_ip}} check inter 2000 rise 30 fall 15 {% endfor %}

2)编写sls文件

vim /srv/salt/prod/cluster/haproxy-outside.sls

include:
- haproxy.install
haproxy-service:
file.managed:
- name: /etc/haproxy/haproxy.cfg
- source: salt://cluster/files/haproxy-outside.cfg
- user: root
- group: root
- mode: 644
- template: jinja # 添加了jinja这一行
service.running:
- name: haproxy
- enable: True
- reload: True
- require:
- cmd: haproxy-init
- watch:
- file: haproxy-service

 

执行以下高级状态,如果报错jinja has no attibute backend_www_chinasoft_com重启一下master即可

# salt '*' state.highstate

此时向haproxy添加backend主机

curl -s http://192.168.3.12:2379/v2/keys/salt/haproxy/backend_www_chinasoft_com/web-node2 -XPUT -d value="192.168.3.12:8080" | python -m json.tool
curl -s http://192.168.3.12:2379/v2/keys/salt/haproxy/backend_www_chinasoft_com/web-node3 -XPUT -d value="192.168.3.12:8080" | python -m json.tool
curl -s http://192.168.3.12:2379/v2/keys/salt/haproxy/backend_www_chinasoft_com/web-node4 -XPUT -d value="192.168.3.12:8080" | python -m json.tool 

执行变更

# salt '*' state.highstate

通过访问haproxy的管理界面可以看到成功添加 http://192.168.3.12:8888/haproxy-status

可以看到pillar的选项,如果不能看到需要修改/etc/salt/master (pillar_opts: False)

# salt '*' pillar.items

结果

node2.chinasoft.com:
----------
backend_www_chinasoft_com:
----------
web-node1:
192.168.3.12:8080
web-node2:
192.168.3.12:8080
web-node3:
192.168.3.12:8080
web-node4:
192.168.3.12:8080
zabbix-agent:
----------
Zabbix_Server:
192.168.3.13
mini1:
----------
backend_www_chinasoft_com:
----------
web-node1:
192.168.3.12:8080
web-node2:
192.168.3.12:8080
web-node3:
192.168.3.12:8080
web-node4:
192.168.3.12:8080
zabbix-agent:
----------
Zabbix_Server:
192.168.3.13

编写脚本实现自动添加haproxy后端服务器

# vim auto_add_haproxynode.sh

复制代码
#!/bin/bash

MAIN_ADD_HOST=$1
create_host(){
echo 'create host ok'
}

deploy_service(){
ADD_HOST_PORT='8080'
}

deploy_code(){
echo 'deploy code ok'
}

service_check(){
STATUS=$(curl -s --head http://"$ADD_HOST":"$ADD_HOST_PORT"/ |grep "200 OK")
if [ -n "$STATUS" ];then
echo 'status check ok'
else
echo 'status check not ok'
exit
fi
}

etcd_key(){
ADD_HOST=$1
curl http://192.168.3.12:2379/v2/keys/salt/haproxy/backend_www_chinasoft_com/$ADD_HOST -XPUT -d value="192.168.3.19:${ADD_HOST_PORT}"
}

sync_state(){
salt '*' state.sls cluster.haproxy-outside env=prod
}

main(){
create_host;
deploy_service;
deploy_code;
etcd_key $MAIN_ADD_HOST;
sync_state;
}

main $1
复制代码

 

执行脚本,可以看到成功添加

# ./auto_add_haproxynode.sh web-node18

 

 

posted on 2019-02-27 16:45  五光十色  阅读(349)  评论(0编辑  收藏  举报

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