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---
- name: Stop if kube_control_plane group is empty
assert:
that: groups.get( 'kube_control_plane' )
run_once: true
when: not ignore_assert_errors
- name: Stop if etcd group is empty in external etcd mode
assert:
that: groups.get('etcd')
fail_msg: "Group 'etcd' cannot be empty in external etcd mode"
run_once: true
when:
- not ignore_assert_errors
- etcd_deployment_type != "kubeadm"
- name: Stop if non systemd OS type
assert:
that: ansible_service_mgr == "systemd"
when: not ignore_assert_errors
- name: Stop if the os does not support
assert:
that: (allow_unsupported_distribution_setup | default(false)) or ansible_distribution in supported_os_distributions
msg: "{{ ansible_distribution }} is not a known OS"
when: not ignore_assert_errors
- name: Stop if unknown network plugin
assert:
that: kube_network_plugin in ['calico', 'flannel', 'weave', 'cloud', 'cilium', 'cni', 'kube-ovn', 'kube-router', 'macvlan', 'custom_cni']
msg: "{{ kube_network_plugin }} is not supported"
when:
- kube_network_plugin is defined
- not ignore_assert_errors
- name: Stop if unsupported version of Kubernetes
assert:
that: kube_version is version(kube_version_min_required, '>=')
msg: "The current release of Kubespray only support newer version of Kubernetes than {{ kube_version_min_required }} - You are trying to apply {{ kube_version }}"
when: not ignore_assert_errors
# simplify this items-list when https://github.com/ansible/ansible/issues/15753 is resolved
- name: "Stop if known booleans are set as strings (Use JSON format on CLI: -e \"{'key': true }\")"
assert:
that: item.value | type_debug == 'bool'
msg: "{{ item.value }} isn't a bool"
run_once: true
with_items:
- { name: download_run_once, value: "{{ download_run_once }}" }
- { name: deploy_netchecker, value: "{{ deploy_netchecker }}" }
- { name: download_always_pull, value: "{{ download_always_pull }}" }
- { name: helm_enabled, value: "{{ helm_enabled }}" }
- { name: openstack_lbaas_enabled, value: "{{ openstack_lbaas_enabled }}" }
when: not ignore_assert_errors
- name: Stop if even number of etcd hosts
assert:
that: groups.etcd | length is not divisibleby 2
when:
- not ignore_assert_errors
- inventory_hostname in groups.get('etcd',[])
- name: Stop if memory is too small for control plane nodes
assert:
that: ansible_memtotal_mb >= minimal_master_memory_mb
when:
- not ignore_assert_errors
- ('kube_control_plane' in group_names)
- name: Stop if memory is too small for nodes
assert:
that: ansible_memtotal_mb >= minimal_node_memory_mb
when:
- not ignore_assert_errors
- ('kube_node' in group_names)
# This command will fail if cgroups are not enabled on the node.
# For reference: https://kubernetes.io/docs/concepts/architecture/cgroups/#check-cgroup-version
- name: Stop if cgroups are not enabled on nodes
command: stat -fc %T /sys/fs/cgroup/
changed_when: false
when: not ignore_assert_errors
# This assertion will fail on the safe side: One can indeed schedule more pods
# on a node than the CIDR-range has space for when additional pods use the host
# network namespace. It is impossible to ascertain the number of such pods at
# provisioning time, so to establish a guarantee, we factor these out.
# NOTICE: the check blatantly ignores the inet6-case
- name: Guarantee that enough network address space is available for all pods
assert:
that: "{{ (kubelet_max_pods | default(110)) | int <= (2 ** (32 - kube_network_node_prefix | int)) - 2 }}"
msg: "Do not schedule more pods on a node than inet addresses are available."
when:
- not ignore_assert_errors
- ('k8s_cluster' in group_names)
- kube_network_node_prefix is defined
- kube_network_plugin != 'calico'
- name: Stop if ip var does not match local ips
assert:
that: (ip in ansible_all_ipv4_addresses) or (ip in ansible_all_ipv6_addresses)
msg: "IPv4: '{{ ansible_all_ipv4_addresses }}' and IPv6: '{{ ansible_all_ipv6_addresses }}' do not contain '{{ ip }}'"
when:
- not ignore_assert_errors
- ip is defined
- name: Ensure ping package
package:
# noqa: jinja[spacing]
name: >-
{%- if ansible_os_family == 'Debian' -%}
iputils-ping
{%- else -%}
iputils
{%- endif -%}
state: present
when:
- access_ip is defined
- not ignore_assert_errors
- ping_access_ip
- not is_fedora_coreos
- not ansible_os_family in ["Flatcar", "Flatcar Container Linux by Kinvolk"]
- name: Stop if access_ip is not pingable
command: ping -c1 {{ access_ip }}
when:
- access_ip is defined
- not ignore_assert_errors
- ping_access_ip
changed_when: false
- name: Stop if RBAC is not enabled when dashboard is enabled
assert:
that: rbac_enabled
when:
- dashboard_enabled
- not ignore_assert_errors
- name: Stop if RBAC is not enabled when OCI cloud controller is enabled
assert:
that: rbac_enabled
when:
- cloud_provider is defined and cloud_provider == "oci"
- not ignore_assert_errors
- name: Stop if kernel version is too low
assert:
that: ansible_kernel.split('-')[0] is version('4.9.17', '>=')
when:
- kube_network_plugin == 'cilium' or cilium_deploy_additionally | default(false) | bool
- not ignore_assert_errors
- name: Stop if bad hostname
assert:
that: inventory_hostname is match("[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$")
msg: "Hostname must consist of lower case alphanumeric characters, '.' or '-', and must start and end with an alphanumeric character"
when: not ignore_assert_errors
- name: Check cloud_provider value
assert:
that: cloud_provider in ['gce', 'aws', 'azure', 'openstack', 'vsphere', 'oci', 'external']
msg: "If set the 'cloud_provider' var must be set either to 'gce', 'aws', 'azure', 'openstack', 'vsphere', 'oci' or 'external'"
when:
- cloud_provider is defined
- not ignore_assert_errors
tags:
- cloud-provider
- facts
- name: "Check that kube_service_addresses is a network range"
assert:
that:
- kube_service_addresses | ansible.utils.ipaddr('net')
msg: "kube_service_addresses = '{{ kube_service_addresses }}' is not a valid network range"
run_once: true
- name: "Check that kube_pods_subnet is a network range"
assert:
that:
- kube_pods_subnet | ansible.utils.ipaddr('net')
msg: "kube_pods_subnet = '{{ kube_pods_subnet }}' is not a valid network range"
run_once: true
- name: "Check that kube_pods_subnet does not collide with kube_service_addresses"
assert:
that:
- kube_pods_subnet | ansible.utils.ipaddr(kube_service_addresses) | string == 'None'
msg: "kube_pods_subnet cannot be the same network segment as kube_service_addresses"
run_once: true
- name: "Check that IP range is enough for the nodes"
assert:
that:
- 2 ** (kube_network_node_prefix - kube_pods_subnet | ansible.utils.ipaddr('prefix')) >= groups['k8s_cluster'] | length
msg: "Not enough IPs are available for the desired node count."
when: kube_network_plugin != 'calico'
run_once: true
- name: Stop if unknown dns mode
assert:
that: dns_mode in ['coredns', 'coredns_dual', 'manual', 'none']
msg: "dns_mode can only be 'coredns', 'coredns_dual', 'manual' or 'none'"
when: dns_mode is defined
run_once: true
- name: Stop if unknown kube proxy mode
assert:
that: kube_proxy_mode in ['iptables', 'ipvs']
msg: "kube_proxy_mode can only be 'iptables' or 'ipvs'"
when: kube_proxy_mode is defined
run_once: true
- name: Stop if unknown cert_management
assert:
that: cert_management | d('script') in ['script', 'none']
msg: "cert_management can only be 'script' or 'none'"
run_once: true
- name: Stop if unknown resolvconf_mode
assert:
that: resolvconf_mode in ['docker_dns', 'host_resolvconf', 'none']
msg: "resolvconf_mode can only be 'docker_dns', 'host_resolvconf' or 'none'"
when: resolvconf_mode is defined
run_once: true
- name: Stop if etcd deployment type is not host, docker or kubeadm
assert:
that: etcd_deployment_type in ['host', 'docker', 'kubeadm']
msg: "The etcd deployment type, 'etcd_deployment_type', must be host, docker or kubeadm"
when:
- inventory_hostname in groups.get('etcd',[])
- name: Stop if container manager is not docker, crio or containerd
assert:
that: container_manager in ['docker', 'crio', 'containerd']
msg: "The container manager, 'container_manager', must be docker, crio or containerd"
run_once: true
- name: Stop if etcd deployment type is not host or kubeadm when container_manager != docker
assert:
that: etcd_deployment_type in ['host', 'kubeadm']
msg: "The etcd deployment type, 'etcd_deployment_type', must be host or kubeadm when container_manager is not docker"
when:
- inventory_hostname in groups.get('etcd',[])
- container_manager != 'docker'
# TODO: Clean this task up when we drop backward compatibility support for `etcd_kubeadm_enabled`
- name: Stop if etcd deployment type is not host or kubeadm when container_manager != docker and etcd_kubeadm_enabled is not defined
run_once: true
when: etcd_kubeadm_enabled is defined
block:
- name: Warn the user if they are still using `etcd_kubeadm_enabled`
debug:
msg: >
"WARNING! => `etcd_kubeadm_enabled` is deprecated and will be removed in a future release.
You can set `etcd_deployment_type` to `kubeadm` instead of setting `etcd_kubeadm_enabled` to `true`."
changed_when: true
- name: Stop if `etcd_kubeadm_enabled` is defined and `etcd_deployment_type` is not `kubeadm` or `host`
assert:
that: etcd_deployment_type == 'kubeadm'
msg: >
It is not possible to use `etcd_kubeadm_enabled` when `etcd_deployment_type` is set to {{ etcd_deployment_type }}.
Unset the `etcd_kubeadm_enabled` variable and set `etcd_deployment_type` to desired deployment type (`host`, `kubeadm`, `docker`) instead."
when: etcd_kubeadm_enabled
- name: Stop if download_localhost is enabled but download_run_once is not
assert:
that: download_run_once
msg: "download_localhost requires enable download_run_once"
when: download_localhost
- name: Stop if kata_containers_enabled is enabled when container_manager is docker
assert:
that: container_manager != 'docker'
msg: "kata_containers_enabled support only for containerd and crio-o. See https://github.com/kata-containers/documentation/blob/1.11.4/how-to/run-kata-with-k8s.md#install-a-cri-implementation for details"
when: kata_containers_enabled
- name: Stop if gvisor_enabled is enabled when container_manager is not containerd
assert:
that: container_manager == 'containerd'
msg: "gvisor_enabled support only compatible with containerd. See https://github.com/kubernetes-sigs/kubespray/issues/7650 for details"
when: gvisor_enabled
- name: Stop if download_localhost is enabled for Flatcar Container Linux
assert:
that: ansible_os_family not in ["Flatcar", "Flatcar Container Linux by Kinvolk"]
msg: "download_run_once not supported for Flatcar Container Linux"
when: download_run_once or download_force_cache
- name: Ensure minimum containerd version
assert:
that: containerd_version is version(containerd_min_version_required, '>=')
msg: "containerd_version is too low. Minimum version {{ containerd_min_version_required }}"
run_once: true
when:
- containerd_version not in ['latest', 'edge', 'stable']
- container_manager == 'containerd'
- name: Stop if using deprecated containerd_config variable
assert:
that: containerd_config is not defined
msg: "Variable containerd_config is now deprecated. See https://github.com/kubernetes-sigs/kubespray/blob/master/inventory/sample/group_vars/all/containerd.yml for details."
when:
- containerd_config is defined
- not ignore_assert_errors
- name: Stop if auto_renew_certificates is enabled when certificates are managed externally (kube_external_ca_mode is true)
assert:
that: not auto_renew_certificates
msg: "Variable auto_renew_certificates must be disabled when CA are managed externally: kube_external_ca_mode = true"
when:
- kube_external_ca_mode
- not ignore_assert_errors
- name: Stop if using deprecated comma separated list for admission plugins
assert:
that: "',' not in kube_apiserver_enable_admission_plugins[0]"
msg: "Comma-separated list for kube_apiserver_enable_admission_plugins is now deprecated, use separate list items for each plugin."
when:
- kube_apiserver_enable_admission_plugins is defined
- kube_apiserver_enable_admission_plugins | length > 0
- name: Verify that the packages list structure is valid
ansible.utils.validate:
criteria: "{{ lookup('file', 'pkgs-schema.json') }}"
data: "{{ pkgs }}"
- name: Verify that the packages list is sorted
vars:
pkgs_lists: "{{ pkgs.keys() | list }}"
assert:
that: "pkgs_lists | sort == pkgs_lists"
fail_msg: "pkgs is not sorted: {{ pkgs_lists | ansible.utils.fact_diff(pkgs_lists | sort) }}"
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