用 yum 安装 MongoDB 报 404

centos7

按照官方文档创建了 /etc/yum.repos.d/mongodb-org-3.2.repo 填写配置

[mongodb-org-3.2]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.2/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.2.asc

然后

yum install -y mongodb-org

Loaded plugins: langpacks
Repository 'mongodb': Error parsing config: Error parsing "enabled = ''": invalid boolean value
https://repo.mongodb.org/yum/redhat/7/mongodb-org/3.2/x86_64/repodata/repomd.xml: [Errno 12] Timeout on https://repo.mongodb.org/yum/redhat/7/mongodb-org/3.2/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 3516 milliseconds')
Trying other mirror.
https://repo.mongodb.org/yum/redhat/7/mongodb-org/3.2/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: repo.mongodb.org; Name or service not known"
Trying other mirror.
Resolving Dependencies
--> Running transaction check
---> Package mongodb-org.x86_64 0:3.2.7-1.el7 will be installed
--> Processing Dependency: mongodb-org-tools = 3.2.7 for package: mongodb-org-3.2.7-1.el7.x86_64
--> Processing Dependency: mongodb-org-shell = 3.2.7 for package: mongodb-org-3.2.7-1.el7.x86_64
--> Processing Dependency: mongodb-org-server = 3.2.7 for package: mongodb-org-3.2.7-1.el7.x86_64
--> Processing Dependency: mongodb-org-mongos = 3.2.7 for package: mongodb-org-3.2.7-1.el7.x86_64
--> Running transaction check
---> Package mongodb-org-mongos.x86_64 0:3.2.7-1.el7 will be installed
---> Package mongodb-org-server.x86_64 0:3.2.7-1.el7 will be installed
---> Package mongodb-org-shell.x86_64 0:3.2.7-1.el7 will be installed
---> Package mongodb-org-tools.x86_64 0:3.2.7-1.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package                Arch       Version            Repository           Size
================================================================================
Installing:
 mongodb-org            x86_64     3.2.7-1.el7        mongodb-org-3.2     5.8 k
Installing for dependencies:
 mongodb-org-mongos     x86_64     3.2.7-1.el7        mongodb-org-3.2     5.6 M
 mongodb-org-server     x86_64     3.2.7-1.el7        mongodb-org-3.2      12 M
 mongodb-org-shell      x86_64     3.2.7-1.el7        mongodb-org-3.2     6.7 M
 mongodb-org-tools      x86_64     3.2.7-1.el7        mongodb-org-3.2      43 M

Transaction Summary
================================================================================
Install  1 Package (+4 Dependent packages)

Total download size: 68 M
Installed size: 221 M
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
mongodb-org-mongos-3.2.7-1.el7 FAILED
https://repo.mongodb.org/yum/redhat/7/mongodb-org/3.2/x86_64/RPMS/mongodb-org-mongos-3.2.7-1.el7.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: repo.mongodb.org; Name or service not known"
Trying other mirror.
mongodb-org-3.2.7-1.el7.x86_64 FAILED
https://repo.mongodb.org/yum/redhat/7/mongodb-org/3.2/x86_64/RPMS/mongodb-org-3.2.7-1.el7.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: repo.mongodb.org; Name or service not known"
Trying other mirror.
mongodb-org-server-3.2.7-1.el7 FAILED
https://repo.mongodb.org/yum/redhat/7/mongodb-org/3.2/x86_64/RPMS/mongodb-org-server-3.2.7-1.el7.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: repo.mongodb.org; Name or service not known"
Trying other mirror.
mongodb-org-shell-3.2.7-1.el7. FAILED
https://repo.mongodb.org/yum/redhat/7/mongodb-org/3.2/x86_64/RPMS/mongodb-org-shell-3.2.7-1.el7.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: repo.mongodb.org; Name or service not known"
Trying other mirror.
mongodb-org-tools-3.2.7-1.el7. FAILED
https://repo.mongodb.org/yum/redhat/7/mongodb-org/3.2/x86_64/RPMS/mongodb-org-tools-3.2.7-1.el7.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: repo.mongodb.org; Name or service not known"
Trying other mirror.


Error downloading packages:
  mongodb-org-mongos-3.2.7-1.el7.x86_64: [Errno 256] No more mirrors to try.
  mongodb-org-shell-3.2.7-1.el7.x86_64: [Errno 256] No more mirrors to try.
  mongodb-org-tools-3.2.7-1.el7.x86_64: [Errno 256] No more mirrors to try.
  mongodb-org-server-3.2.7-1.el7.x86_64: [Errno 256] No more mirrors to try.
  mongodb-org-3.2.7-1.el7.x86_64: [Errno 256] No more mirrors to try.

这样应该怎么办？求 dalao 帮助