Centos7 安装部署 Airflow

本人在centos7 的环境下部署，怎么在centos7 下配置静态 IP 关闭防火墙以及安装jdk在这里不多赘述，

centos7 配置静态ip可以参考:https://www.cnblogs.com/braveym/p/8523100.html 和 https://www.cnblogs.com/braveym/p/9096402.html

Airflow 基础安装

1、默认自带python2环境，自行安装pip

sudo yum -y install epel-release
sudo yum -y install python-pip

2、进行pip的更新，否则很多安装会报错

sudo pip install --upgrade pip
sudo pip install --upgrade setuptools

3、安装开发库

sudo yum install python-devel
sudo yum install libevent-devel
sudo yum install mysql-devel

4、安装centos7下的mysql

在安装mysql前建议先更新一下源，不然下载老失败

打开centos的yum文件夹（需要root权限或者拥有该目录的操作权限才可以）

输入命令cd /etc/yum.repos.d

用wget下载repo文件

输入命令sudo wget http://mirrors.aliyun.com/repo/Centos-7.repo（如果wget命令不生效，说明还没有安装wget工具，输入sudo yum -y install wget 回车进行安装）

备份系统原来的repo文件

sudo mv  CentOS-Base.repo CentOS-Base.repo.bak

替换系统原理的repo文件

sudo wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo

在更新源之前先把自带的mariadb删除，会报类似这样的错误

[bigdata@bigdata ~]$ rpm -qa|grep mariadb
mariadb-libs-5.5.-.el7_5.x86_64
[bigdata@bigdata ~]$ rpm -e --nodeps mariadb-libs-5.5.-.el7_5.x86_64
error: can't create transaction lock on /var/lib/rpm/.rpm.lock (Permission denied)
[bigdata@bigdata ~]$ sudo rpm -e --nodeps mariadb-libs-5.5.-.el7_5.x86_64
[bigdata@bigdata ~]$ rpm -qa|grep mariadb
[bigdata@bigdata ~]$

执行yum源更新命令

sudo yum clean all
 
sudo yum makecache
 
sudo yum -y update （需要比较长的时间）

在https://dev.mysql.com/downloads/mysql/下载mysql的离线安装包

下载完之后把包上传到集群

解压

把以上解压包每一个都安装一遍，但是，安装的时候建议安装顺序来，不要随便拿起一个就安装，不然会报这样的错误

所以建议按照下面的顺序进行安装

bigdata@bigdata mysql]$ sudo rpm -ivh mysql-community-common-5.7.27-1.el7.x86_64.rpm
warning: mysql-community-common-5.7.27-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:mysql-community-common-5.7.27-1.e################################# [100%]
[bigdata@bigdata mysql]$ sudo rpm -ivh mysql-community-libs-5.7.27-1.el7.x86_64.rpm
warning: mysql-community-libs-5.7.27-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:mysql-community-libs-5.7.27-1.el7################################# [100%]
[bigdata@bigdata mysql]$ sudo rpm -ivh mysql-community-libs-compat-5.7.27-1.el7.x86_64.rpm
warning: mysql-community-libs-compat-5.7.27-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:mysql-community-libs-compat-5.7.2################################# [100%]
[bigdata@bigdata mysql]$ sudo rpm -ivh mysql-community-embedded-compat-5.7.27-1.el7.x86_64.rpm
warning: mysql-community-embedded-compat-5.7.27-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:mysql-community-embedded-compat-5################################# [100%]
[bigdata@bigdata mysql]$ sudo rpm -ivh mysql-community-devel-5.7.27-1.el7.x86_64.rpm
warning: mysql-community-devel-5.7.27-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:mysql-community-devel-5.7.27-1.el################################# [100%]
[bigdata@bigdata mysql]$ sudo rpm -ivh mysql-community-client-5.7.27-1.el7.x86_64.rpm
warning: mysql-community-client-5.7.27-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:mysql-community-client-5.7.27-1.e################################# [100%]
[bigdata@bigdata mysql]$ sudo rpm -ivh mysql-community-server-5.7.27-1.el7.x86_64.rpm
warning: mysql-community-server-5.7.27-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:mysql-community-server-5.7.27-1.e################################# [100%]
[bigdata@bigdata mysql]$

先关闭mysql服务

修改MySql配置

skip-grant-tables #添加这句话，这时候登入mysql就不需要密码

启动mysql

[bigdata@bigdata mysql]$ sudo systemctl start mysqld.service
[bigdata@bigdata mysql]$ sudo systemctl status mysqld.service
● mysqld.service - MySQL Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since Tue -- :: CST; 3s ago
     Docs: man:mysqld()
           http://dev.mysql.com/doc/refman/en/using-systemd.html
  Process:  ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=/SUCCESS)
  Process:  ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=/SUCCESS)
 Main PID:  (mysqld)
    Tasks:
   CGroup: /system.slice/mysqld.service
           └─ /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid
 
Aug  :: bigdata systemd[]: Starting MySQL Server...
Aug  :: bigdata systemd[]: Started MySQL Server.

登录mysql，输入密码处直接回车就可以

5、初始化配置mysql，可以设定允许root远程登录

先通过root登录mysql,密码是刚刚给root用户设置的密码我这里是：Admin123!

Mysql默认不允许远程登录，我们需要设置下，并且防火墙开放3306端口；(备注 mysql5.7默认密码策略要求密码必须是大小写字母数字特殊字母的组合，至少8位)

mysql> set password for root@localhost = password('Admin123!');
ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement
mysql> flush privileges; 
Query OK, 0 rows affected (0.00 sec)
 
mysql> set password for root@localhost = password('Admin123!');
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> create user 'airflow'@'localhost' identified by 'Airflow123!';
Query OK, 0 rows affected (0.05 sec)

mysql> grant all on airflow.* to 'airflow'@'%';
Query OK, 0 rows affected (0.02 sec)

 
mysql>  flush privileges;
Query OK, 0 rows affected (0.00 sec)
 
mysql> quit;
Bye

修改配置文件

设置MySql开机自启

sudo systemctl enable mysqld

对于防火墙开启的情况下，就需要开发3306端口，我这里是把防火墙关闭

[bigdata@bigdata mysql]$ sudo firewall-cmd --zone=public --add-port=/tcp --permanent
FirewallD is not running
[bigdata@bigdata mysql]$ sudo firewall-cmd --reload
FirewallD is not running

6、配置Mysql默认编码为UTF-8

修改/etc/my.cnf配置文件，在[mysqld]下添加编码配置

character_set_server=utf8
init_connect='SET NAMES utf8'

编辑保存完重启mysql服务: sudo systemctl restart mysqld.service

查看下编码：

[bigdata@bigdata mysql]$ mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.7. MySQL Community Server (GPL)
 
Copyright (c) , , Oracle and/or its affiliates. All rights reserved.
 
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
 
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 
mysql> show variables like '%character%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       |
| character_set_connection | utf8                       |
| character_set_database   | utf8                       |
| character_set_filesystem | binary                     |
| character_set_results    | utf8                       |
| character_set_server     | utf8                       |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
 rows in set (0.01 sec)
 
mysql>

7、安装AirFlow

给airflow设置环境变量

sudo vim /etc/profile

#airflow
export AIRFLOW_HOME=/opt/modules/airflow
export SLUGIFY_USES_TEXT_UNIDECODE=yes

是环境变量生效

安装airflow

sudo pip install apache-airflow

可以看到出现以下错误

这样解决：

sudo pip install six --user -U
sudo pip install ipython --user -U
sudo pip install --ignore-installed dnspython

sudo yum install python-devel

sudo yum install openldap-devel

sudo pip install --ignore-installed python-ldap

sudo pip install --ignore-installed enum34

前面的问题解决了，又开始新的问题

这个问题这样解决：

sudo pip install --ignore-installed requests

最后再重新安装一次airflow,可以看到成功了

8、设置mysql数据库连接

sudo pip install apache-airflow[mysql]

创建airflow用户,创建airflow数据库并给出所有权限给此用户（注意在设置密码的时候还是前面讲的问题，不能太简单，否则不能通过）

mysql> create database airflow;
Query OK,  row affected (0.00 sec)
 
mysql> create user 'airflow'@'%' identified by 'AirFlow123!';
Query OK,  rows affected (0.02 sec)
 
mysql> GRANT all privileges on airflow.* TO 'airflow'@'%'  IDENTIFIED BY 'AirFlow123!';
Query OK,  rows affected,  warning (0.01 sec)
 
mysql> FLUSH PRIVILEGES;
Query OK,  rows affected (0.00 sec)

修改airflow配置文件，指向数据库mysql

`airflow.cfg` 文件通常在`~/airflow`目录下

executor =  LocalExecutor
sql_alchemy_conn = mysql://airflow:AirFlow123!@192.168.189.11/airflow
对应字段解释如下： dialect+driver://username:password@host:port/database

修改mysql的配置文件

vim /etc/my.cnf

添加这一句

explicit_defaults_for_timestamp=

重启mysql

9、初始化airflow并启动web服务

sudo airflow initdb
sudo airflow webserver
sudo airflow scheduler
sudo airflow worker

在浏览器打开地址 192.168.189.11:8080