Preparing the k0s.inventory.yml inventory file

To create the k0s.inventory.yml inventory file:

1. Go to the KUMA installer folder by executing the following command:

   cd kuma-ansible-installer-ha

2. Copy the k0s.inventory.yml.template file to create the expand.inventory.yml inventory file:

   cp k0s.inventory.yml.template k0s.inventory.yml

3. Edit the inventory file settings in k0s.inventory.yml.

   Sample inventory file for a demo installation with the Core in Kubernetes

   all:

   vars:

   ansible_connection: ssh

   ansible_user: root

   deploy_to_k8s: true

   need_transfer: false

   generate_etc_hosts: false

   airgap: true

   deploy_example_services: true

   kuma:

   children:

   kuma_core:

   hosts:

   kuma.example.com:

   mongo_log_archives_number: 14

   mongo_log_frequency_rotation: daily

   mongo_log_file_size: 1G

   kuma_collector:

   hosts:

   kuma.example.com:

   kuma_correlator:

   hosts:

   kuma.example.com:

   kuma_storage:

   hosts:

   kuma.example.com:

   shard: 1

   replica: 1

   keeper: 1

   kuma_k0s:

   children:

   kuma_control_plane_master_worker:

   hosts:

   kuma-cpw.example.com:

   ansible_host: 10.0.2.11

   extra_args: "--labels=kaspersky.com/kuma-core=true,kaspersky.com/kuma-ingress=true,node.longhorn.io/create-default-disk=true"

   For a demo installation, specify deploy_example_services: true. KUMA will deploy demo services on the specified hosts and assign the shard, replica, and keeper roles to the specified host; configuring these roles in the KUMA web interface is not necessary for a demo installation.

   Sample inventory file for a distributed installation in a high availability configuration with 3 controllers, 2 worker nodes, and 1 balancer

   all:

   vars:

   ansible_connection: ssh

   ansible_user: root

   deploy_to_k8s: true

   need_transfer: false

   generate_etc_hosts: false

   airgap: true

   deploy_example_services: false

   kuma:

   children:

   kuma_core:

   hosts:

   kuma-core.example.com:

   mongo_log_archives_number: 14

   mongo_log_frequency_rotation: daily

   mongo_log_file_size: 1G

   kuma_collector:

   hosts:

   kuma-collector.example.com:

   kuma_correlator:

   hosts:

   kuma-correlator.example.com:

   kuma_storage:

   hosts:

   kuma-storage-cluster1.server1.example.com

   kuma-storage-cluster1.server2.example.com

   kuma-storage-cluster1.server3.example.com

   kuma-storage-cluster1.server4.example.com

   kuma-storage-cluster1.server5.example.com

   kuma-storage-cluster1.server6.example.com

   kuma-storage-cluster1.server7.example.com

   kuma_k0s:

   children:

   kuma_lb:

   hosts:

   kuma-lb.example.com:

   kuma_managed_lb: true

   kuma_control_plane_master:

   hosts:

   kuma_cpm.example.com:

   ansible_host: 10.0.1.10

   kuma_control_plane_master_worker:

   kuma_control_plane:

   hosts:

   kuma_cp2.example.com:

   ansible_host: 10.0.1.11

   kuma_cp3.example.com:

   ansible_host: 10.0.1.12

   kuma_control_plane_worker:

   kuma_worker:

   hosts:

   kuma-w1.example.com:

   ansible_host: 10.0.2.11

   extra_args: "--labels=kaspersky.com/kuma-core=true,kaspersky.com/kuma-ingress=true,node.longhorn.io/create-default-disk=true"

   kuma-w2.example.com:

   ansible_host: 10.0.2.12

   extra_args: "--labels=kaspersky.com/kuma-core=true,kaspersky.com/kuma-ingress=true,node.longhorn.io/create-default-disk=true"

   For such a configuration, specify the need_transfer: false, airgap: true, deploy_example_services: false, and in the kuma_storage section, list the servers for the storage cluster. After the installation is complete, you can use the KUMA web interface to assign the shard, replica and keeper roles to the servers specified in the inventory.

   Sample inventory file for migrating the Core from a distributed installation to a Kubernetes cluster to ensure high availability

   all:

   vars:

   ansible_connection: ssh

   ansible_user: root

   deploy_to_k8s: true

   need_transfer: true

   generate_etc_hosts: false

   airgap: true

   deploy_example_services: false

   kuma:

   children:

   kuma_core:

   hosts:

   kuma-core.example.com:

   mongo_log_archives_number: 14

   mongo_log_frequency_rotation: daily

   mongo_log_file_size: 1G

   kuma_collector:

   hosts:

   kuma-collector.example.com:

   kuma_correlator:

   hosts:

   kuma-correlator.example.com:

   kuma_storage:

   hosts:

   kuma-storage-cluster1.server1.example.com

   kuma-storage-cluster1.server2.example.com

   kuma-storage-cluster1.server3.example.com

   kuma-storage-cluster1.server4.example.com

   kuma-storage-cluster1.server5.example.com

   kuma-storage-cluster1.server6.example.com

   kuma-storage-cluster1.server7.example.com

   kuma_k0s:

   children:

   kuma_lb:

   hosts:

   kuma-lb.example.com:

   kuma_managed_lb: true

   kuma_control_plane_master:

   hosts:

   kuma_cpm.example.com:

   ansible_host: 10.0.1.10

   kuma_control_plane_master_worker:

   kuma_control_plane:

   hosts:

   kuma_cp2.example.com:

   ansible_host: 10.0.1.11

   kuma_cp3.example.com:

   ansible_host: 10.0.1.12

   kuma_control_plane_worker:

   kuma_worker:

   hosts:

   kuma-w1.example.com:

   ansible_host: 10.0.2.11

   extra_args: "--labels=kaspersky.com/kuma-core=true,kaspersky.com/kuma-ingress=true,node.longhorn.io/create-default-disk=true"

   kuma-w2.example.com:

   ansible_host: 10.0.2.12

   extra_args: "--labels=kaspersky.com/kuma-core=true,kaspersky.com/kuma-ingress=true,node.longhorn.io/create-default-disk=true"

   The kuma_core, kuma_ collector, kuma_correlator, kuma_storage sections of your k0s.inventory.yml inventory file must contain the same hosts that were used in the distributed.inventory.yml file when KUMA was upgraded from version 2.1.3 to version 3.0.2 or when a new installation was performed. In the k0s.inventory.yml inventory file, set deploy_to_k8s: true, need_transfer: true, airgap: true, deploy_example_services: false.

We recommend backing up the inventory file that you used to install the program. You can use it to add components to the system or remove KUMA.