7bcc5579e2
Currently the ordering of network interfaces in the seed VM is
non-deterministic. This happens because we apply the 'unique' filter to
the network_interfaces list, which does not guarantee a deterministic
ordering. This list is then transformed and passed to the
stackhpc.libvirt-vm role.
There are two consequences of this:
* it is not possible to determine which interface names should be used
prior to creating a seed VM
* if a seed VM is recreated, the interface ordering may change
This change fixes the issue by sorting the network_interfaces list
alphabetically before it is transformed and passed to the
stackhpc.libvirt-vm.
A new 'seed_vm_interfaces' variable is also added, which allows for
customisation of the VM's interfaces - potentially allowing for more
complex setups such as trunked VLANs.
Story: 2007259
Task: 38621
There is a second issue, which is that if the seed VM has a
network interface not configured with a gateway, cloud-init will fail to
configure the network interfaces on the host. This has been observed on
CentOS 8, but is probably more tied to the version of cloud-init, and
may affect CentOS 7. The following error is seen in the cloud-init logs:
KeyError: 'gateway'
This change has been addressed in the jriguera.configdrive role, and
this change updates the version used in requirements.yml.
Story: 2007769
Task: 39993
Change-Id: Ib6ab41a3ba320a1fe15d0d23561fad2fab7861e6
113 lines
4.1 KiB
YAML
113 lines
4.1 KiB
YAML
---
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- name: Ensure that the seed VM configdrive exists
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hosts: seed-hypervisor
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vars:
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seed_host: "{{ groups['seed'][0] }}"
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pre_tasks:
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- name: Verify the seed host exists in the Ansible inventory
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fail:
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msg: >
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There should be exactly one host in the seed group. There are
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currently {{ groups['seed'] | length }}.
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when: groups['seed'] | length != 1
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# NOTE(priteau): On seed hypervisors running CentOS 8, the configdrive role
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# will fail to install coreutils if coreutils-single is already present.
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# Until the role handles it, install it using the --allowerasing option
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# which will remove coreutils-single.
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- name: Ensure coreutils package is installed
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command: "dnf install coreutils -y --allowerasing"
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become: True
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when:
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- ansible_os_family == 'RedHat'
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- name: Ensure the image cache directory exists
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file:
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path: "{{ image_cache_path }}"
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state: directory
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owner: "{{ ansible_user_uid }}"
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group: "{{ ansible_user_gid }}"
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become: True
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roles:
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- role: jriguera.configdrive
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# For now assume the VM OS family is the same as the hypervisor's.
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configdrive_os_family: "{{ ansible_os_family }}"
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configdrive_uuid: "{{ seed_host | to_uuid }}"
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configdrive_fqdn: "{{ seed_host }}"
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configdrive_name: "{{ seed_host }}"
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configdrive_ssh_public_key: "{{ lookup('file', ssh_public_key_path) }}"
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configdrive_config_dir: "{{ image_cache_path }}"
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configdrive_volume_path: "{{ image_cache_path }}"
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configdrive_config_dir_delete: True
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configdrive_resolv:
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domain: "{{ hostvars[seed_host].resolv_domain | default }}"
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search: "{{ hostvars[seed_host].resolv_search | default }}"
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dns: "{{ hostvars[seed_host].resolv_nameservers | default([]) }}"
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configdrive_network_device_list: >
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{{ hostvars[seed_host].network_interfaces |
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map('net_configdrive_network_device', seed_host) |
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list }}
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tasks:
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- name: Set a fact containing the configdrive image path
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set_fact:
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seed_vm_configdrive_path: "{{ image_cache_path }}/{{ seed_host }}.iso"
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- name: Ensure configdrive is decoded and decompressed
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shell: >
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base64 -d {{ image_cache_path }}/{{ seed_host | to_uuid }}.gz
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| gunzip
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> {{ seed_vm_configdrive_path }}
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- name: Ensure unnecessary files are removed
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file:
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path: "{{ item }}"
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state: absent
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with_items:
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- "{{ image_cache_path }}/{{ seed_host | to_uuid }}.gz"
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- name: Ensure that the seed VM is provisioned
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hosts: seed-hypervisor
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vars:
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seed_host: "{{ groups['seed'][0] }}"
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pre_tasks:
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- name: Check the size of the configdrive image
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stat:
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path: "{{ seed_vm_configdrive_path }}"
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get_checksum: False
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get_md5: False
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mime: False
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register: stat_result
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roles:
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- role: stackhpc.libvirt-vm
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seed_vm_configdrive_volume:
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name: "{{ hostvars[seed_host].seed_vm_name }}-configdrive"
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pool: "{{ hostvars[seed_host].seed_vm_pool }}"
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# Round size up to next multiple of 4096.
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capacity: "{{ (stat_result.stat.size + 4095) // 4096 * 4096 }}"
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device: "cdrom"
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format: "raw"
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image: "{{ seed_vm_configdrive_path }}"
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libvirt_vm_image_cache_path: "{{ image_cache_path }}"
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libvirt_vms:
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- name: "{{ hostvars[seed_host].seed_vm_name }}"
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memory_mb: "{{ hostvars[seed_host].seed_vm_memory_mb }}"
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vcpus: "{{ hostvars[seed_host].seed_vm_vcpus }}"
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volumes: "{{ hostvars[seed_host].seed_vm_volumes + [seed_vm_configdrive_volume] }}"
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interfaces: "{{ hostvars[seed_host].seed_vm_interfaces }}"
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console_log_enabled: true
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become: True
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tasks:
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- name: Wait for SSH access to the seed VM
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local_action:
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module: wait_for
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host: "{{ hostvars[seed_host].ansible_host }}"
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port: 22
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state: started
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# NOTE: Ensure we exceed the 5 minute DHCP timeout of the eth0
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# interface if necessary.
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timeout: 360
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