How To Install OpenvSwitch On CentOS 7

1. Install some packages
   • yum -y install wget openssl-devel gcc make python-devel openssl-devel kernel-devel kernel-debug-devel autoconf automake rpm-build redhat-rpm-config libtool
2. You can add a user that can see the file and directory clearly, up to you.
   • adduser ovs
   • su - ovs
3. Get the file and decompress it
   • mkdir -p ~/rpmbuild/SOURCES
   • wget http://openvswitch.org/releases/openvswitch-2.3.1.tar.gz
   • cp openvswitch-2.3.1.tar.gz ~/rpmbuild/SOURCES/
   • tar xfz openvswitch-2.3.1.tar.gz
4. Modify the file
   • sed 's/openvswitch-kmod, //g' openvswitch-2.3.1/rhel/openvswitch.spec > openvswitch-2.3.1/rhel/openvswitch_no_kmod.spec
5. Generate the rpm file
   • rpmbuild -bb --nocheck ~/openvswitch-2.3.1/rhel/openvswitch_no_kmod.spec
   • exit
6. Install the rpm package
   • yum localinstall /home/ovs/rpmbuild/RPMS/x86_64/openvswitch-2.3.1-1.x86_64.rpm
7. Check that the command-line tools are ready
   • ovs-vsctl -V
8. NOW, if you're using SELinux in enfocing mode and try to start the service, you'll find some errors. Please follow the steps to solve it.
   • yum install policycoreutils-python
   • mkdir /etc/openvswitch
   • semanage fcontext -a -t openvswitch_rw_t "/etc/openvswitch(/.*)?"
   • restorecon -Rv /etc/openvswitch
9. Start OpenvSwitch
   • /etc/init.d/openvswitch start