kubernetes
Version information
This version is compatible with:
- Puppet Enterprise 2019.8.x, 2019.7.x, 2019.5.x, 2019.4.x, 2019.3.x, 2019.2.x, 2019.1.x, 2019.0.x, 2018.1.x, 2017.3.x, 2017.2.x, 2017.1.x, 2016.5.x, 2016.4.x
- Puppet >= 4.2.1 < 7.0.0
- RedHat,CentOS,Ubuntu
Tasks:
- swagger_k8s_list_core_v1_component_status
- swagger_k8s_list_core_v1_config_map_for_all_namespaces
- swagger_k8s_list_core_v1_endpoints_for_all_namespaces
- swagger_k8s_list_core_v1_event_for_all_namespaces
- swagger_k8s_list_core_v1_limit_range_for_all_namespaces
- swagger_k8s_list_core_v1_namespace
- swagger_k8s_list_core_v1_node
- and 521 more. See all tasks
Plans:
- deploy
Start using this module
Add this module to your Puppetfile:
mod 'puppetlabs-kubernetes', '4.0.1'Learn more about managing modules with a PuppetfileDocumentation
Kubernetes
Table of Contents
- Description
- Setup - The basics of getting started with kubernetes
- Reference - An under-the-hood peek at what the module is doing and how
- Limitations - OS compatibility, etc.
- Development - Guide for contributing to the module
- Examples - Puppet Bolt task examples
Description
This module installs and configures Kubernetes which is an open-source system for automating deployment, scaling, and management of containerized applications. For efficient management and discovery, containers that make up an application are grouped into logical units.
To bootstrap a Kubernetes cluster in a secure and extensible way, this module uses the kubeadm toolkit.
Setup
Install this module, generate the configuration, add the OS and hostname yaml files to Hiera, and configure your node.
Included in this module is Kubetool, a configuration tool that auto-generates the Hiera security parameters, the discovery token hash, and other configurations for your Kubernetes cluster. To simplify installation and use, the tool is available as a Docker image.
Generating the module configuration
If Docker is not installed on your workstation, install it from here.
The Kubetool Docker image takes each parameter as an environment variable.
Note:: The version of Kubetool you use must match the version of the module on the Puppet Forge. For example, if using the module version 1.0.0, use puppet/kubetool:1.0.0.
To output a yaml file into your working directory that corresponds to the operating system you want Kubernetes to run on, and for each controller node, run either of these docker run commands:
docker run --rm -v $(pwd):/mnt --env-file env puppet/kubetool:{$module_version}
The docker run command above includes an env file which is included in the root folder of this repo.
docker run --rm -v $(pwd):/mnt -e OS=debian -e VERSION=1.10.2 -e CONTAINER_RUNTIME=docker -e CNI_PROVIDER=weave -e ETCD_INITIAL_CLUSTER=kube-master:172.17.10.101,kube-replica-master-01:172.17.10.210,kube-replica-master-02:172.17.10.220 -e ETCD_IP="%{::ipaddress_eth1}" -e KUBE_API_ADVERTISE_ADDRESS="%{::ipaddress_eth1}" -e INSTALL_DASHBOARD=true puppet/kubetool:{$module-version}
The above parameters are:
OS: The operating system Kubernetes runs on.VERSION: The version of Kubernetes to deploy.CONTAINER_RUNTIME: The container runtime Kubernetes uses. Set this value todocker(officially supported) orcri_containerd. Advanced Kubernetes users can usecri_containerd, however this requires an increased understanding of Kubernetes, specifically when running applications in a HA cluster. To run a HA cluster and access your applications, an external load balancer is required in front of your cluster. Setting this up is beyond the scope of this module. For more information, see the Kubernetes documentation.CNI_PROVIDER: The CNI network to install. Set this value toweaveorflannel.ETCD_INITIAL_CLUSTER: The server hostnames and IPs in the form ofhostname:ip. When in production, include three, five, or seven nodes for etcd.ETCD_IP: The IP each etcd member listens on. We recommend passing the fact for the interface to be used by the cluster.KUBE_API_ADVERTISE_ADDRESS: The IP each etcd/apiserver instance uses on each controller. We recommend passing the fact for the interface to be used by the cluster.INSTALL_DASHBOARD: A boolean which specifies whether to install the dashboard.
Kubetool creates:
-
A yaml file that corresponds to the operating system specified by the
OSparameter. To view the file contents, runcat Debian.yamlfor a Debian system, or runcat RedHat.yamlfor RedHat. The yaml files produced for each member of the etcd cluster contain certificate information to bootstrap an initial etcd cluster. Ensure these are also placed in your hieradata directory at the node level. -
A discovery token hash and encoded values required by Kubernetes. To regenerate the values, including certificates and tokens, run the
kubetoolcommand again.
Adding the {$OS}.yaml and {$hostname}.yaml files to Hiera
Add the {$OS}.yaml file to the same control repo where your Hiera data is, usually the data directory. By leveraging location facts, such as the pp_datacenter trusted fact, each cluster can be allocated its own configuration.
Configuring your node
After the {$OS}.yaml and {$hostname}.yaml files have been added to the Hiera directory on your Puppet server, configure your node as the controller or worker.
A controller node contains the control plane and etcd. In a production cluster, you should have three, five, or seven controllers. A worker node runs your applications. You can add as many worker nodes as Kubernetes can handle. For information about nodes in Kubernetes, see the Kubernetes documentation.
Note:: A node cannot be a controller and a worker. It must be one or the other.
To make a node a controller, add the following code to the manifest:
class {'kubernetes':
controller => true,
}
To make a node a worker, add the following code to the manifest:
class {'kubernetes':
worker => true,
}
Validating and unit testing the module
This module is compliant with the Puppet Development Kit (PDK), which provides tools to help run unit tests on the module and validate the modules's metadata, syntax, and style.
Note: To run static validations and
unit tests against this module using the pdk validate and pdk test unit commands, you must have Puppet 5 or higher installed. In the following examples we have specified Puppet 5.3.6.
To validate the metadata.json file, run the following command:
pdk validate metadata --puppet-version='5.3.6'
To validate the Puppet code and syntax, run the following command:
pdk validate puppet --puppet-version='5.3.6'
Note: The pdk validate ruby command ignores the excluded directories specified in the .rubocop.yml file. Therefore, to validate the Ruby code style and syntax you must specify the directory the code exists in.
In the following example we validate the Ruby code contained in the lib directory:
pdk validate ruby lib --puppet-version='5.3.6'
To unit test the module, run the following command:
pdk test unit --puppet-version='5.3.6'
Reference
Classes
Public classes
- kubernetes
Private classes
- kubernetes::cluster_roles
- kubernetes::config
- kubernetes::kube_addons
- kubernetes::packages
- kubernetes::repos
- kubernetes::service
Defined types
- kubernetes::kubeadm_init
- kubernetes::kubeadm_join
Parameters
The following parameters are available in the kubernetes class.
apiserver_cert_extra_sans
A string array of Subject Alternative Names for the API server certificates.
Defaults to [].
apiserver_extra_arguments
A string array of extra arguments passed to the API server.
Defaults to [].
apiserver_extra_volumes
A hash of extra volumes mounts mounted on the API server.
For example,
apiserver_extra_volumes => {
'volume-name' => {
hostPath => '/data',
mountPath => '/data',
},
}
Defaults to {}.
cloud_provider
The name of the cloud provider configured in /etc/kubernetes/cloud-config.
Note: This file is not managed within this module and must be present before bootstrapping the Kubernetes controller.
Defaults to undef.
cloud_config
The location of the cloud config file used by cloud_provider. For use with v1.12 and above.
Note: This file is not managed within this module and must be present before bootstrapping the Kubernetes controller.
Defaults to undef.
cni_network_provider
The URL to get the CNI providers yaml file. kube_tool sets this value.
Defaults to undef.
cni_rbac_binding
The download URL for the cni providers rbac rules. Only for use with Calico.
Defaults to undef.
cni_pod_cidr
Specifies the overlay (internal) network range to use. This value is set by kube_tool per CNI_PROVIDER.
Defaults to undef.
container_runtime
Specifies the runtime that the Kubernetes cluster uses.
Valid values are cri_containerd or docker.
Defaults to docker.
controller
Specifies whether to set the node as a Kubernetes controller.
Valid values are true, false.
Defaults to false.
containerd_version
Specifies the version of the containerd runtime the module installs.
Defaults to 1.1.0.
containerd_archive
The name of the containerd archive.
Defaults to containerd-${containerd_version}.linux-amd64.tar.gz.
containerd_source
The download URL for the containerd archive.
Defaults to https://github.com/containerd/containerd/releases/download/v${containerd_version}/${containerd_archive}.
controller_address
The IP address and port for the controller the worker node joins. For example 172.17.10.101:6443.
Defaults to undef.
controllermanager_extra_arguments
A string array of extra arguments passed to the controller manager.
Defaults to [].
controllermanager_extra_volumes
A hash of extra volumes mounts mounted on the controller manager container.
For example,
controllermanager_extra_volumes => {
'volume-name' => {
hostPath => '/data',
mountPath => '/data',
},
}
Defaults to {}.
create_repos
Specifies whether to install the upstream Kubernetes and Docker repos.
Valid values are true, false.
Defaults to true.
disable_swap
Specifies whether to turn off swap setting. This is required for kubeadm.
Valid values are true, false.
Defaults to true.
manage_kernel_modules
Specifies whether to manage the kernel modules needed for kubernetes
Valid values are true, false.
Defaults to true
manage_sysctl_settings
Specifies whether to manage the the sysctl settings needed for kubernetes
Valid values are true, false.
Defaults to true
discovery_token_hash
The string used to validate to the root CA public key when joining a cluster. This value is created by kubetool.
Defaults to undef.
docker_apt_location
The APT repo URL for the Docker packages.
Defaults to https://apt.dockerproject.org/repo.
docker_apt_release
The release name for the APT repo for the Docker packages.
Defaults to 'ubuntu-${::lsbdistcodename}'.
docker_apt_repos
The repos to install from the Docker APT url.
Defaults to main.
docker_version
Specifies the version of the Docker runtime to install.
Defaults to:
17.03.0.ce-1.el7.centoson RedHat.17.03.0~ce-0~ubuntu-xenialon Ubuntu.
docker_package_name
The docker package name to download from an upstream repo.
Defaults to docker-engine.
docker_key_id
The gpg key for the Docker APT repo.
Defaults to '58118E89F3A912897C070ADBF76221572C52609D'.
docker_key_source
The URL for the Docker APT repo gpg key.
Defaults to https://apt.dockerproject.org/gpg.
docker_yum_baseurl
The YUM repo URL for the Docker packages.
Defaults to https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64.
docker_yum_gpgkey
The URL for the Docker yum repo gpg key.
Defaults to https://yum.dockerproject.org/gpg.
etcd_version
Specifies the version of etcd.
Defaults to 3.1.12.
etcd_archive
Specifies the name of the etcd archive.
Defaults to etcd-v${etcd_version}-linux-amd64.tar.gz.
etcd_source
The download URL for the etcd archive.
Defaults to https://github.com/coreos/etcd/releases/download/v${etcd_version}/${etcd_archive}.
etcd_install_method
The method on how to install etcd. Can be either wget (using etcd_source) or package (using $etcd_package_name)
Defaults to wget.
etcd_package_name
The system package name for installing etcd
Defaults to etcd-server.
etcd_hostname
Specifies the name of the etcd instance.
A Hiera is kubernetes::etcd_hostname:"%{::fqdn}".
Defaults to $hostname.
etcd_ip
Specifies the IP address etcd uses for communications.
A Hiera is kubernetes::etcd_ip:"%{::ipaddress_enp0s8}".
Defaults to undef.
etcd_initial_cluster
Informs etcd on how many nodes are in the cluster.
A Hiera example is kubernetes::etcd_initial_cluster: kube-master:172.17.10.101,kube-replica-master-01:172.17.10.210,kube-replica-master-02:172.17.10.220.
Defaults to undef.
etcd_initial_cluster_state
Informs etcd on the state of the cluster when starting. Useful for adding single nodes to a cluster. Allowed values are new or existing.
Defaults to new
etcd_peers
Specifies how etcd lists the peers to connect to the cluster.
A Hiera example is kubernetes::etcd_peers:
- 172.17.10.101
- 172.17.10.102
- 172.17.10.103
Defaults to undef
etcd_ca_key
The CA certificate key data for the etcd cluster. This value must be passed as string and not as a file.
Defaults to undef.
etcd_ca_crt
The CA certificate data for the etcd cluster. This value must be passed as string and not as a file.
Defaults to undef.
etcdclient_key
The client certificate key data for the etcd cluster. This value must be passed as string and not as a file.
Defaults to undef.
etcdclient_crt
The client certificate data for the etcd cluster. This value must be passed as string not as a file.
Defaults to undef.
etcdserver_key
The server certificate key data for the etcd cluster. This value must be passed as string not as a file.
Defaults to undef.
etcdserver_crt
The server certificate data for the etcd cluster . This value must be passed as string not as a file.
Defaults to undef.
etcdpeer_crt
The peer certificate data for the etcd cluster. This value must be passed as string not as a file.
Defaults to undef.
etcdpeer_key
The peer certificate key data for the etcd cluster. This value must be passed as string not as a file.
Defaults to undef.
image_repository
The container registry to pull control plane images from.
Defaults to k8s.gcr.io
install_dashboard
Specifies whether the Kubernetes dashboard is installed.
Valid values are true, false.
Defaults to false.
kubernetes_ca_crt
The cluster's CA certificate. Must be passed as a string and not a file.
Defaults to undef.
kubernetes_ca_key
The clusters CA key. Must be passed as a string and not a file.
Defaults to undef.
kube_api_advertise_address
The IP address you want exposed by the API server.
A Hiera example is kubernetes::kube_api_advertise_address:"%{::ipaddress_enp0s8}".
Defaults to undef.
kubernetes_version
The version of the Kubernetes containers to install.
Defaults to 1.10.2.
kubernetes_package_version
The version the Kubernetes OS packages to install, such as kubectl and kubelet.
Defaults to 1.10.2.
kubeadm_extra_config
A hash containing extra configuration data to be serialised with to_yaml and appended to the config.yaml file used by kubeadm.
Defaults to {}.
kubelet_extra_config
A hash containing extra configuration data to be serialised with to_yaml and appended to Kubelet configuration file for the cluster. Requires DynamicKubeletConfig.
Defaults to {}.
kubelet_extra_arguments
A string array to be appended to kubeletExtraArgs in the Kubelet's nodeRegistration configuration. It is applied to both masters and nodes. Use this for critical Kubelet settings such as pod-infra-container-image which may be problematic to configure via kubelet_extra_config and DynamicKubeletConfig.
Defaults to [].
kubernetes_apt_location
The APT repo URL for the Kubernetes packages.
Defaults to https://apt.kubernetes.io.
kubernetes_apt_release
The release name for the APT repo for the Kubernetes packages.
Defaults to 'kubernetes-${::lsbdistcodename}'.
kubernetes_apt_repos
The repos to install using the Kubernetes APT URL.
Defaults to main.
kubernetes_key_id
The gpg key for the Kubernetes APT repo.
Defaults to '54A647F9048D5688D7DA2ABE6A030B21BA07F4FB'.
kubernetes_key_source
The URL for the APT repo gpg key.
Defaults to https://packages.cloud.google.com/apt/doc/apt-key.gpg.
kubernetes_yum_baseurl
The YUM repo URL for the Kubernetes packages.
Defaults to https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64.
kubernetes_yum_gpgkey
The URL for the Kubernetes yum repo gpg key.
Defaults to https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg.
manage_docker
Specifies whether to install Docker repositories and packages via this module.
Valid values are true, false.
Defaults to true.
manage_etcd
Specifies whether to install an external Etcd via this module.
Valid values are true, false.
Defaults to true.
node_label
An override to the label of a node.
Defaults to hostname.
runc_source
The download URL for runc.
Defaults to https://github.com/opencontainers/runc/releases/download/v${runc_version}/runc.amd64.
runc_version
Specifies the version of runc to install.
Defaults to 1.0.0-rc5.
sa_key
The key for the service account. This value must be a certificate value and not a file.
Defaults to undef.
sa_pub
The public key for the service account. This value must be a certificate value and not a file.
Defaults to undef.
schedule_on_controller
Specifies whether to remove the master role and allow pod scheduling on controllers.
Valid values are true, false.
Defaults to false.
service_cidr
The IP address range for service VIPs.
Defaults to 10.96.0.0/12.
token
The string used to join nodes to the cluster. This value must be in the form of [a-z0-9]{6}.[a-z0-9]{16}.
Defaults to undef.
worker
Specifies whether to set the node as a Kubernetes worker.
Valid values are true, false.
Defaults to false.
Limitations
This module supports:
- Puppet 4 or higher.
- Kubernetes 1.10.x or higher.
- Ruby 2.3.0 or higher.
This module has been tested on the following operating systems:
- RedHat 7.x.
- CentOS 7.x.
- Ubuntu 16.04
Docker is the supported container runtime for this module.
Development
If you would like to contribute to this module, please follow the rules in the CONTRIBUTING.md.
Examples
In the examples folder you will find a bash script containg a few sample Puppet Bolt commands for the usage of the tasks. The example script is intended to be used with a Kubernetes API that requires the token authentication header, but the token parameter is optional by default.
What are tasks?
Modules can contain tasks that take action outside of a desired state managed by Puppet. It’s perfect for troubleshooting or deploying one-off changes, distributing scripts to run across your infrastructure, or automating changes that need to happen in a particular order as part of an application deployment.
Tasks in this module release
What are plans?
Modules can contain plans that take action outside of a desired state managed by Puppet. It’s perfect for troubleshooting or deploying one-off changes, distributing scripts to run across your infrastructure, or automating changes that need to happen in a particular order as part of an application deployment.
Change log
All notable changes to this project will be documented in this file. The format is based on Keep a Changelog and this project adheres to Semantic Versioning.
v4.0.1 (2019-05-13)
Fixed
- Add extra arguments for API server and controller manager #282 (fydai)
- cluster name missing tag brackets in worker config #280 (jorhett)
- Avoid log message about waiting for SA when it already exists #278 (jorhett)
- MODULES-8947 fixing bugs and tests #274 (sheenaajay)
Version 4.0.0
Upgrade tasks for version v1beta1
Upgrade kubeadmn templates for v1beta1 (kubernetes versions 1.13.+)
Ability to change etcd hostname
Ability to change Kubernetes dashboard url
A full list of PR's and issues closed can be found here here
Version 3.4.0
Add Puppet Bolt tasks to interact with the Kubernetes API
Version 3.3.0
Moves env variable to init.pp
Set cgroup driver in config file
Ability to change cluster name
Restrucuture config class
New defined type for SA in new namespaces
A full list of PR's and issues closed can be found here here
Version 3.2.2
Fixes bug where nodes in v1.10/11 could not join the cluster
A full list of PR's and issues closed can be found here here
Version 3.2.1
Fixes world readable PKI keys in /etc/kubernetes/config.yaml
Allows changing etcd cluster state with new param
A full list of PR's and issues closed can be found here here
Version 3.2.0
Includes support for 1.13.x with the alpha3 config files
Uses config file for join tasks
Versions Dashboard
Enables kubelet service on RHEL/Centos
Removes params.pp in favor of data in init.pp
A full list of PR's and issues closed can be found here here
Version 3.1.0
Adds support for Kubernetes 1.12.x
A full list of PR's and issues closed can be found here here
https://github.com/puppetlabs/puppetlabs-kubernetes/milestone/3?closed=1
Version 3.0.1
Fixes an incorrect default value for ignore_preflight_errors in the cluster_roles class
Version 3.0.0
Exposes a significant number of new params to allow the use of internal repos in restricted or airgapped systems.
A full list of PRs and issues closed can be found here
Version 2.0.2
Fixes issue with cgroup mismatch on docker PR #109
ignores docker warning ine prelifght checks when using containerd PR #109
Version 2.0.1
Changes default runtime to docker
Version 2.0.0
Architectural change to use kubeadm project to bootstrap kubernetes clusters.
Updates to kubetool and params to reflect this change. See the README.md in this repo and consult the official kubeadm documenation here
Version 1.1.0
Add parameters for networking
Minor bug fixes
Full list of PR's available at here
Version 1.0.3
Change exec path for controller PR #57
Fix gpg key for docker apt repo PR #58
Fix in kubetool for weave cni provider URL PR #63
Version 1.0.2
Hotfix for kubelet downgrading cni in the rhel family
Version 1.0.1
Support for weave and flannel
EPEL module removed as dependency
Added $apiserver_extra_arguments PR #47
Added support for PDK
Added support for stdlib 4.24.0
Updated kubetool to include CNI information in hiera (see README)
Version 1.0.0
Officially supported version of puppetlabs-kubernetes
Version 0.2.0
Supports Kubernetes up to 1.9.x
Adds support for cri-containerd runtime
Provides additional os and runtime switches for Kubetool
Version 0.1.3
Provide cli switches for kubetool, and add Dockerfile
Version 0.1.2
Supports Kubernetes up to 1.8.x
Version 0.1.1
Hotfix for kubeproxy
Version 0.1.0
First release
Supports Kubernetes 1.6 - 1.7.5
* This Changelog was automatically generated by github_changelog_generator
Dependencies
- puppetlabs-stdlib (>= 4.20.0 <= 5.2.0)
- puppetlabs-apt (>= 4.1.0 <= 6.3.0)
- puppet-archive (>= 2.0.0 <= 3.2.1)
- puppetlabs-translate (>= 0.0.1 <= 1.2.0)
- herculesteam-augeasproviders_sysctl (>= 2.2.1 < 3.0.0)
- herculesteam-augeasproviders_core (>= 2.1.0 < 3.0.0)
- camptocamp-kmod (>= 2.2.0 < 3.0.0)
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