config.vm.define box, define_opts do |config|
      config.vm.box = 'elastic/sles-12-x86_64'
      sles_common config, box
    end
  end
  'rhel-8'.tap do |box|
    config.vm.define box, define_opts do |config|
      config.vm.box = 'elastic/rhel-8-x86_64'
      rpm_common config, box
    end
  end

  windows_2012r2_box = ENV['VAGRANT_WINDOWS_2012R2_BOX']

* Introduce node memory pressure condition to scheduler ([#25531](https://github.com/kubernetes/kubernetes/pull/25531), [@ingvagabund](https://github.com/ingvagabund))
* Fix detection of docker cgroup on RHEL ([#25907](https://github.com/kubernetes/kubernetes/pull/25907), [@ncdc](https://github.com/ncdc))

--permanent ``` Note that `permanent` makes sure the rules are persistent across firewall start, restart or reload. Finally reload the firewall for changes to take effect. ```sh firewall-cmd --reload ``` ### iptables For hosts with iptables enabled (RHEL, CentOS, etc), you can use `iptables` command to enable all traffic coming to specific ports. Use below command to allow access to port 9000 ```sh iptables -A INPUT -p tcp --dport 9000 -j ACCEPT service iptables restart ``` Below command enables all...

* Fixes an issue pulling pod specs referencing unqualified images from docker.io on centos/fedora/rhel ([#53161](https://github.com/kubernetes/kubernetes/pull/53161), [@dims](https://github.com/dims))
* Update kube-dns to 1.14.5 ([#53153](https://github.com/kubernetes/kubernetes/pull/53153), [@bowei](https://github.com/bowei))

    * updating Service/Endpoints IPs in very large clusters on RHEL/CentOS 7.
* kubeadm: support any Linux kernel version newer than 3.10 ([#81623](https://github.com/kubernetes/kubernetes/pull/81623), [@neolit123](https://github.com/neolit123))