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Add bad hostname preflight check 

Hostname must be a valid DNS name, which is checked as https://github.com/kubernetes/apimachinery/blob/master/pkg/util/validation/validation.go#L115

The situation I have encountered is that my hostname contained underscore which is disallowed and apiserver refused to start.
pull/3135/head
Tatsuyuki Ishi 2018-08-20 00:20:36 +09:00
parent 3663061b38
commit 3eef8dc8d0
1 changed files with 6 additions and 0 deletions
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6
roles/kubernetes/preinstall/tasks/verify-settings.yml
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@ -103,3 +103,9 @@
that: ansible_kernel.split('-')[0]|version_compare('4.8', '>=') that: ansible_kernel.split('-')[0]|version_compare('4.8', '>=')
when: kube_network_plugin == 'cilium' when: kube_network_plugin == 'cilium'
ignore_errors: "{{ ignore_assert_errors }}" ignore_errors: "{{ ignore_assert_errors }}"
- name: Stop if bad hostname
assert:
that: inventory_hostname | match("[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 }}"