c12s-kubespray/roles/kubernetes/preinstall/tasks/0020-verify-settings.yml

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---
- name: Stop if either kube-master, kube-node or etcd is empty
assert:
that: groups.get('{{ item }}')
with_items:
- kube-master
- kube-node
- etcd
run_once: true
- name: Stop if non systemd OS type
assert:
that: ansible_service_mgr == "systemd"
ignore_errors: "{{ ignore_assert_errors }}"
- name: Stop if unknown OS
assert:
that: ansible_os_family in ['RedHat', 'CentOS', 'Fedora', 'Ubuntu', 'Debian', 'CoreOS', 'Container Linux by CoreOS', 'openSUSE Leap', 'openSUSE Tumbleweed', 'ClearLinux']
ignore_errors: "{{ ignore_assert_errors }}"
- name: Stop if unknown network plugin
assert:
that: kube_network_plugin in ['calico', 'canal', 'flannel', 'weave', 'cloud', 'cilium', 'contiv', 'kube-router']
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when: kube_network_plugin is defined
ignore_errors: "{{ ignore_assert_errors }}"
- name: Stop if incompatible network plugin and cloudprovider
assert:
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that: kube_network_plugin != 'calico'
msg: "Azure and Calico are not compatible. See https://github.com/projectcalico/calicoctl/issues/949 for details."
when: cloud_provider is defined and cloud_provider == 'azure'
ignore_errors: "{{ 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: yes
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 }}" }
ignore_errors: "{{ ignore_assert_errors }}"
- name: Stop if even number of etcd hosts
assert:
that: groups.etcd|length is not divisibleby 2
ignore_errors: "{{ ignore_assert_errors }}"
- name: Stop if memory is too small for masters
assert:
that: ansible_memtotal_mb >= 1500
ignore_errors: "{{ ignore_assert_errors }}"
when: inventory_hostname in groups['kube-master']
- name: Stop if memory is too small for nodes
assert:
that: ansible_memtotal_mb >= 1024
ignore_errors: "{{ ignore_assert_errors }}"
when: inventory_hostname in groups['kube-node']
# 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."
ignore_errors: "{{ ignore_assert_errors }}"
when:
- inventory_hostname in groups['kube-node']
- kube_network_node_prefix is defined
- name: Stop if ip var does not match local ips
assert:
that: ip in ansible_all_ipv4_addresses
ignore_errors: "{{ ignore_assert_errors }}"
when: ip is defined
- name: Stop if access_ip is not pingable
command: ping -c1 {{ access_ip }}
when: access_ip is defined
ignore_errors: "{{ ignore_assert_errors }}"
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- name: Stop if RBAC is not enabled when dashboard is enabled
assert:
that: rbac_enabled
when: dashboard_enabled
ignore_errors: "{{ 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"
ignore_errors: "{{ ignore_assert_errors }}"
- name: Stop if RBAC and anonymous-auth are not enabled when insecure port is disabled
assert:
that: rbac_enabled and kube_api_anonymous_auth
when: kube_apiserver_insecure_port == 0 and inventory_hostname in groups['kube-master']
ignore_errors: "{{ ignore_assert_errors }}"
- name: Stop if kernel version is too low
assert:
that: ansible_kernel.split('-')[0] is version('4.8', '>=')
when: kube_network_plugin == 'cilium'
ignore_errors: "{{ 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"
ignore_errors: "{{ ignore_assert_errors }}"
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- name: check cloud_provider value
assert:
that: cloud_provider in ['generic', 'gce', 'aws', 'azure', 'openstack', 'vsphere', 'oci', 'external']
msg: "If set the 'cloud_provider' var must be set either to 'generic', 'gce', 'aws', 'azure', 'openstack', 'vsphere', or external"
when:
- cloud_provider is defined
ignore_errors: "{{ ignore_assert_errors }}"
tags:
- cloud-provider
- facts
- name: "Get current version of calico cluster version"
shell: "{{ bin_dir }}/calicoctl version | grep 'Cluster Version:' | awk '{ print $3}'"
register: calico_version_on_server
async: 10
poll: 3
run_once: yes
delegate_to: "{{ groups['kube-master'][0] }}"
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changed_when: false
when:
- kube_network_plugin == 'calico'
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- name: "Check that calico version is enough for upgrade"
assert:
that:
- calico_version_on_server.stdout is version('v2.6.5', '>=')
msg: "Your version of calico is not fresh enough for upgrade. Minimum version v2.6.5"
when:
- kube_network_plugin == 'calico'
- 'calico_version_on_server.stdout is defined'
- 'calico_version_on_server.stdout != ""'
- inventory_hostname == groups['kube-master'][0]
run_once: yes
- name: "Check that kube_service_addresses is a network range"
assert:
that:
- kube_service_addresses | ipaddr('net')
msg: "kube_service_addresses = '{{ kube_service_addresses }}' is not a valid network range"
run_once: yes
- name: "Check that kube_pods_subnet is a network range"
assert:
that:
- kube_pods_subnet | ipaddr('net')
msg: "kube_pods_subnet = '{{ kube_pods_subnet }}' is not a valid network range"
run_once: yes
- name: "Check that kube_pods_subnet does not collide with kube_service_addresses"
assert:
that:
- kube_pods_subnet | ipaddr(kube_service_addresses) | string == 'None'
msg: "kube_pods_subnet cannot be the same network segment as kube_service_addresses"
run_once: yes
- 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 vault is chose
assert:
that: cert_management != 'vault'
msg: "Support for vault have been removed, please use 'script' or 'none'"
when: cert_management 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