homestead 配置phpredis扩展,检查步骤有哪些？

系统版本

Welcome to Ubuntu 18.04.3 LTS (GNU/Linux 4.15.0-64-generic x86_64)

php7.3版本的redis扩展已经安装完成了，7.4的安装不成功，请问我以下检查redis扩展的步骤还缺少哪些？我进行排查一下

查看php扩展目录，命令：php7.4 -i|grep extension_dir，指向的是/usr/lib/php/20190529

root@homestead:/usr/lib/php/20180731# php7.4 -i|grep extension_dir
extension_dir => /usr/lib/php/20190529 => /usr/lib/php/20190529

去到php扩展目录/usr/lib/php/20190529，可以看到是有redis.so的。

root@homestead:/usr/lib/php/20190529# ls
bcmath.so    exif.so      iconv.so     mysqli.so     pdo_pgsql.so   pspell.so     sockets.so    xmlreader.so
build        ffi.so       imap.so      mysqlnd.so    pdo.so         readline.so   sqlite3.so    xml.so
calendar.so  fileinfo.so  intl.so      odbc.so       pdo_sqlite.so  redis.so      sysvmsg.so    xmlwriter.so
ctype.so     ftp.so       json.so      opcache.so    pgsql.so       shmop.so      sysvsem.so    xsl.so
curl.so      gd.so        ldap.so      pdo_mysql.so  phar.so        simplexml.so  sysvshm.so    zip.so
dom.so       gettext.so   mbstring.so  pdo_odbc.so   posix.so       soap.so       tokenizer.so

使用phpinfo()方法，查看详情。主要查看Additional .ini files parsed一栏,有/etc/php/7.4/fpm/conf.d/20-redis.ini,可以直接看下面截图不看这个代码块，我标出来了

/etc/php/7.4/fpm/conf.d/10-mysqlnd.ini, /etc/php/7.4/fpm/conf.d/10-opcache.ini, /etc/php/7.4/fpm/conf.d/10-pdo.ini, /etc/php/7.4/fpm/conf.d/15-xml.ini, /etc/php/7.4/fpm/conf.d/20-bcmath.ini, /etc/php/7.4/fpm/conf.d/20-calendar.ini, /etc/php/7.4/fpm/conf.d/20-ctype.ini, /etc/php/7.4/fpm/conf.d/20-curl.ini, /etc/php/7.4/fpm/conf.d/20-dom.ini, /etc/php/7.4/fpm/conf.d/20-exif.ini, /etc/php/7.4/fpm/conf.d/20-ffi.ini, /etc/php/7.4/fpm/conf.d/20-fileinfo.ini, /etc/php/7.4/fpm/conf.d/20-ftp.ini, /etc/php/7.4/fpm/conf.d/20-gd.ini, /etc/php/7.4/fpm/conf.d/20-gettext.ini, /etc/php/7.4/fpm/conf.d/20-iconv.ini, /etc/php/7.4/fpm/conf.d/20-imap.ini, /etc/php/7.4/fpm/conf.d/20-intl.ini, /etc/php/7.4/fpm/conf.d/20-json.ini, /etc/php/7.4/fpm/conf.d/20-ldap.ini, /etc/php/7.4/fpm/conf.d/20-mbstring.ini, /etc/php/7.4/fpm/conf.d/20-mysqli.ini, /etc/php/7.4/fpm/conf.d/20-odbc.ini, /etc/php/7.4/fpm/conf.d/20-pdo_mysql.ini, /etc/php/7.4/fpm/conf.d/20-pdo_odbc.ini, /etc/php/7.4/fpm/conf.d/20-pdo_pgsql.ini, /etc/php/7.4/fpm/conf.d/20-pdo_sqlite.ini, /etc/php/7.4/fpm/conf.d/20-pgsql.ini, /etc/php/7.4/fpm/conf.d/20-phar.ini, /etc/php/7.4/fpm/conf.d/20-posix.ini, /etc/php/7.4/fpm/conf.d/20-pspell.ini, /etc/php/7.4/fpm/conf.d/20-readline.ini, /etc/php/7.4/fpm/conf.d/20-redis.ini, /etc/php/7.4/fpm/conf.d/20-shmop.ini, /etc/php/7.4/fpm/conf.d/20-simplexml.ini, /etc/php/7.4/fpm/conf.d/20-soap.ini, /etc/php/7.4/fpm/conf.d/20-sockets.ini, /etc/php/7.4/fpm/conf.d/20-sqlite3.ini, /etc/php/7.4/fpm/conf.d/20-sysvmsg.ini, /etc/php/7.4/fpm/conf.d/20-sysvsem.ini, /etc/php/7.4/fpm/conf.d/20-sysvshm.ini, /etc/php/7.4/fpm/conf.d/20-tokenizer.ini, /etc/php/7.4/fpm/conf.d/20-xmlreader.ini, /etc/php/7.4/fpm/conf.d/20-xmlwriter.ini, /etc/php/7.4/fpm/conf.d/20-xsl.ini, /etc/php/7.4/fpm/conf.d/20-zip.ini

homestead 配置redis扩展

然后查看/etc/php/7.4/fpm/conf.d/20-redis.ini文件详情，可以看到，只有extension=redis.so这一行，根据2.查看php扩展目录的情况，是有redis.so的，所以是没问题
```
root@homestead:/usr/lib/php/20190529# cat /etc/php/7.4/fpm/conf.d/20-redis.ini
extension=redis.so
```