![cloud overlay cloud overlay](https://cdn.filtergrade.com/wp-content/uploads/2021/02/15100256/1-21.jpg)
For an environment with multiple VMware Cloud Foundation instances, you replicate the design of the first VMware Cloud Foundation instance to the additional VMware Cloud Foundation instances. This conceptual design provides the network virtualization design of the logical components that handle the data to and from management workloads in the environment. You determine the configuration of the vSphere Distributed Switch for the default management cluster and the NSX segments on it, and of the transport zones. The topology and configuration of a Kilo network can be analyzed using the kgctl command line tool.As part of the overlay design, you determine the NSX-T Data Center configuration for handling traffic between management workloads in VMware Cloud Foundation. See the multi-cluster services docs for more details. Now, important-service can be used on cluster2 just like any other Kubernetes Service. Kgctl -kubeconfig $KUBECONFIG2 showconf node $n -as-peer -o yaml -allowed-ips $SERVICECIDR2 | kubectl -kubeconfig $KUBECONFIG1 apply -f -ĭone # Create a Service in cluster2 to mirror the Service in cluster1.Ĭat << EOF | kubectl -kubeconfig $KUBECONFIG2 apply -f - apiVersion: v1 kind: Service metadata: name: important-service spec: ports: - port: 80 - apiVersion: v1 kind: Endpoints metadata: name: important-service subsets: - addresses: - ip: $CLUSTERIP # The cluster IP of the important service on cluster1. for n in $(kubectl -kubeconfig $KUBECONFIG2 get no -o name | cut -d '/ ' -f2 ) do Kgctl -kubeconfig $KUBECONFIG1 showconf node $n -as-peer -o yaml -allowed-ips $SERVICECIDR1 | kubectl -kubeconfig $KUBECONFIG2 apply -f -ĭone # Register the nodes in cluster2 as peers of cluster1. for n in $(kubectl -kubeconfig $KUBECONFIG1 get no -o name | cut -d '/ ' -f2 ) do
![cloud overlay cloud overlay](https://i.ytimg.com/vi/-YMehEJlC7M/maxresdefault.jpg)
# Register the nodes in cluster1 as peers of cluster2. If the cluster does not automatically set the /region node label, then the /location annotation can be used.įor example, the following snippet could be used to annotate all nodes with GCP in the name: data-centers, cloud providers, etc.įor this, Kilo needs to know which groups of nodes are in each location. Step 3: specify topologyīy default, Kilo creates a mesh between the different logical locations in the cluster, e.g. The nodes in the mesh will require an open UDP port in order to communicate.īy default, Kilo uses UDP port 51820. See the WireGuard website for up-to-date instructions for installing WireGuard.Ĭlusters with nodes on which the WireGuard kernel module cannot be installed can use Kilo by leveraging a userspace WireGuard implementation.
#Cloud overlay install
Starting at Linux 5.6, the kernel includes WireGuard in-tree Linux distributions with older kernels will need to install WireGuard.įor most Linux distributions, this can be done using the system package manager. Kilo requires the WireGuard kernel module to be loaded on all nodes in the cluster. Kilo can be installed on any Kubernetes cluster either pre- or post-bring-up. This means that if a cluster uses, for example, Flannel for networking, Kilo can be installed on top to enable pools of nodes in different locations to join Kilo will take care of the network between locations, while Flannel will take care of the network within locations. Kilo can operate both as a complete, independent networking provider as well as an add-on complimenting the cluster-networking solution currently installed on a cluster. The Kilo agent, kg, runs on every node in the cluster, setting up the public and private keys for the VPN as well as the necessary rules to route packets between locations. Kilo uses WireGuard, a performant and secure VPN, to create a mesh between the different nodes in a cluster. services that span across different Kubernetes clusters.Īn introductory video about Kilo from KubeCon EU 2019 can be found on youtube. In addition to creating multi-cloud clusters, Kilo enables the creation of multi-cluster services, i.e. Kilo's design allows clients to VPN to a cluster in order to securely access services running on the cluster. The Pod network created by Kilo is always fully connected, even when the nodes are in different networks or behind NAT.īy allowing pools of nodes in different locations to communicate securely, Kilo enables the operation of multi-cloud clusters. Kilo connects nodes in a cluster by providing an encrypted layer 3 network that can span across data centers and public clouds. Kilo is a multi-cloud network overlay built on WireGuard and designed for Kubernetes.