Recently Tencent cloud spend 5 yuan a month to rent the cloud server's domain name + year, thinking Django project will be deployed to the cloud server, fiddle for a long time before they realized the Configuration section of the cloud environment.
table of Contents
Mysql Django project configuration
They check local start on the cloud server Django project
python3 installation
CentOS 7.6 comes with a python 2.7.5 version,
[root@VM_0_3_centos ~]# python -V
Python 2.7.5First install python3,
[root@VM_0_3_centos ~]# yum install python3View python3 version
[root@VM_0_3_centos ~]# python3 -V
Python 3.6.8Set the connection (similar to shortcut windows system) to connect the python to python3, first check the existing soft connection on the python
[root@VM_0_3_centos ~]# ll /bin/python*
lrwxrwxrwx 1 root root 7 Nov 5 23:09 /bin/python -> python2
lrwxrwxrwx 1 root root 9 Nov 5 23:09 /bin/python2 -> python2.7
-rwxr-xr-x 1 root root 7216 Aug 7 2019 /bin/python2.7
lrwxrwxrwx 1 root root 9 Apr 7 10:07 /bin/python3 -> python3.6
-rwxr-xr-x 2 root root 11408 Aug 8 2019 /bin/python3.6
-rwxr-xr-x 2 root root 11408 Aug 8 2019 /bin/python3.6mDelete the original connection soft python and set the connection to python3.6
[root@VM_0_3_centos ~]# rm /bin/python
rm: remove symbolic link ‘/bin/python’? y
[root@VM_0_3_centos ~]# ln -s /bin/python3.6 /bin/pythonCheck again can be found in soft python has been connected to python3.6
[root@VM_0_3_centos ~]# ll /bin/python
lrwxrwxrwx 1 root root 14 Apr 7 10:17 /bin/python -> /bin/python3.6The same method can be provided to pip3 pip flexible connector
[root@VM_0_3_centos ~]# ln -s /bin/pip3 /bin/pip
[root@VM_0_3_centos ~]# ll /bin/pip
lrwxrwxrwx 1 root root 9 Apr 7 10:33 /bin/pip -> /bin/pip3yum configuration
After installing python3 and set up flexible connections, he encountered the first pit was found yum can not be used
[root@VM_0_3_centos ~]# yum
File "/usr/bin/yum", line 30
except KeyboardInterrupt, e:
^
SyntaxError: invalid syntaxThe original version used by default yum python2.7, and after changing the soft python connected, cause python3.6 yum version is used, and therefore can be changed back through vi editor, the specific method in the first row Plains after some python to add "2", and then save the exit
#!/usr/bin/python2
import sys
try:
import yum
except ImportError:
print >> sys.stderr, """\
...
...
...Meanwhile File "/ usr / libexec / urlgrabber-ext-down" also need to make the same modifications
#! /usr/bin/python2
# A very simple external downloader
# Copyright 2011-2012 Zdenek Pavlas
...
...
...Install the MySQL database
yum to download and install software packages from the repository, view existing software library
[root@VM_0_3_centos ~]# ll /etc/yum.repos.d/
total 8
-rw-r--r-- 1 root root 614 Apr 7 13:27 CentOS-Base.repo
-rw-r--r-- 1 root root 230 Apr 7 13:27 CentOS-Epel.repoFirst, we need to add MySQL Yum Repository (you can view the official website tutorial )
[root@VM_0_3_centos ~]# rpm -Uvh https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpmView software library again and found that more than two
[root@VM_0_3_centos ~]# ll /etc/yum.repos.d/
total 16
-rw-r--r-- 1 root root 614 Apr 7 13:45 CentOS-Base.repo
-rw-r--r-- 1 root root 230 Apr 7 13:45 CentOS-Epel.repo
-rw-r--r-- 1 root root 2076 Apr 25 2019 mysql-community.repo
-rw-r--r-- 1 root root 2108 Apr 25 2019 mysql-community-source.repoAt the same time through rpm -qa ... View All Packages Related to mysql has been installed, the results show there is only one
[root@VM_0_3_centos HelloWorld]# rpm -qa mysql*
mysql80-community-release-el7-3.noarchCan now be installed via yum install mysql-community-server, the command not only installed mysql server must also install additional packages
[root@VM_0_3_centos ~]# yum install mysql-community-serverAfter installation, use rpm -qa mysql * View, found five packages each new installation
[root@VM_0_3_centos ~]# rpm -qa mysql*
mysql80-community-release-el7-3.noarch
mysql-community-libs-8.0.19-1.el7.x86_64
mysql-community-libs-compat-8.0.19-1.el7.x86_64
mysql-community-common-8.0.19-1.el7.x86_64
mysql-community-client-8.0.19-1.el7.x86_64
mysql-community-server-8.0.19-1.el7.x86_64Open mysql
[root@VM_0_3_centos HelloWorld]# systemctl start mysqld.serviceAfter mysqld.log where a is generated initial password root user
[root@VM_0_3_centos ~]# cat /var/log/mysqld.log | grep password
2020-04-07T07:00:22.584068Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: IbHxyweP/2cxLanding mysql, enter the corresponding password
[root@VM_0_3_centos ~]# mysql -uroot -pDuring other operations, suggesting the need to change the password
mysql> show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.Follow the prompts to make a change, 'Tianwan3!' Express the modified password
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'Tianwan3!';
Query OK, 0 rows affected (0.01 sec)New Database HelloWorld, Django project reserved for backup.
mysql> CTEATE DATABASE HelloWorld;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'CTEATE DATABASE HelloWorld' at line 1
mysql> CREATE DATABASE HelloWorld;
Query OK, 1 row affected (0.02 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| HelloWorld |
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.00 sec)New django project
First pip install django
[root@VM_0_3_centos ~]# pip install djangoThen cd to the / home directory, the new HelloWorld project
[root@VM_0_3_centos ~]# cd /home/
[root@VM_0_3_centos home]# django-admin startproject HelloWorldEnter the tree view project structure (no tree, you can first install yum install tree)
[root@VM_0_3_centos home]# tree
.
`-- HelloWorld
|-- HelloWorld
| |-- asgi.py
| |-- __init__.py
| |-- settings.py
| |-- urls.py
| `-- wsgi.py
`-- manage.py
2 directories, 6 filescd to the project HelloWorld, enter python manange.py runserver start
[root@VM_0_3_centos HelloWorld]# python manage.py runserver
...
...
...
django.core.exceptions.ImproperlyConfigured: SQLite 3.8.3 or later is required (found 3.7.17).The results show that the error due to lower sqlite version (sqlite is a lightweight database django project used by default), CentOS 7.6 is built-in sqlite 3.7.17
[root@VM_0_3_centos HelloWorld]# rpm -qa sqlite*
sqlite-3.7.17-8.el7.x86_64One solution may be commented out in the relevant codes File "/usr/local/lib64/python3.6/site-packages/django/db/backends/sqlite3/base.py" will
...
...
...
#def check_sqlite_version():
# if Database.sqlite_version_info < (3, 8, 3):
# raise ImproperlyConfigured('SQLite 3.8.3 or later is required (found %s).' % Database.sqlite_version)
#check_sqlite_version()
...
...
...Enter python manage.py runserver again, the successful launch!
[root@VM_0_3_centos HelloWorld]# python manage.py runserver
Watching for file changes with StatReloader
Performing system checks...
System check identified no issues (0 silenced).
You have 17 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run 'python manage.py migrate' to apply them.
April 07, 2020 - 06:48:35
Django version 3.0.5, using settings 'HelloWorld.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.Mysql Django project configuration
First you need to install a third-party library pymysql
[root@VM_0_3_centos HelloWorld]# pip install pymysqlImport pymysql HelloWorld in a subdirectory of the project in __init__.py
import pymysql
pymysql.install_as_MySQLdb()Modify the database in a subdirectory HelloWorld in settings.py, the initial settings are as follows:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}We modified as follows:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'HelloWorld',
'USER': 'root',
'PASSWORD': 'Tianwan3!',
'PORT': '3306',
'HOST': '',
}
}Start the project, error, mistakes can be found in sqlite problem similar to the previous version of the problem
[root@VM_0_3_centos HelloWorld]# python manage.py runserver
...
...
...
django.core.exceptions.ImproperlyConfigured: mysqlclient 1.3.13 or newer is required; you have 0.9.3.Open the file /usr/local/lib64/python3.6/site-packages/django/db/backends/mysql/base.py, comment out the following two lines
#if version < (1, 3, 13):
# raise ImproperlyConfigured('mysqlclient 1.3.13 or newer is required; you have %s.' % Database.__version__)Started again, success!
[root@VM_0_3_centos HelloWorld]# python manage.py runserver
Watching for file changes with StatReloader
Performing system checks...
System check identified no issues (0 silenced).
You have 17 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, ses
sions.
Run 'python manage.py migrate' to apply them.
April 07, 2020 - 07:33:01
Django version 3.0.5, using settings 'HelloWorld.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.They check local start on the cloud server Django project
Start the project on the cloud server
[root@VM_0_3_centos HelloWorld]# python manage.py runserver 0.0.0.0:8000Local browser input 62.234.83.169:8000 (public ip + cloud server port number), the results being given, suggesting the need to .234.83.169 '62 'to ALLOWED_HOSTS
L cloud server using the vi open the project HelloWorld subdirectories in the settings.py, add the ip
ALLOWED_HOSTS = ['62.234.83.169']Cloud server project is started again, the local browser refresh, success!
