42545f1c3c
This change modifies the LXC image cache system to use machine control, which is part of systemd, to manage images for us. This will give us insight into the cached images which we had not had before all through the `machinectl` cli utility. This change also modifies the image fetch process allowing it to be faster and more transparent to the enduser. Part of the slowness in image fetching and caching is that it happens on every run even if it's not needed. This change will now check the cache expiry and state of the image within `machinectl` and only run the cache update when needed or instructed to do so. Documentation on what can be done with the `machinectl` CLI utility can be found here: * https://www.freedesktop.org/software/systemd/man/machinectl.html Change-Id: Ic7f8bf400ec5781b4be67539bc6c1523069d0ab2 Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>
95 lines
2.9 KiB
YAML
95 lines
2.9 KiB
YAML
---
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# Copyright 2016, Rackspace US, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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- name: Create LXC cache dir
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file:
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path: "{{ cache_path_fact }}"
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state: "directory"
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recurse: true
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- name: Remove existing cache archive
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file:
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path: "{{ cache_path_fact }}/rootfs.tar.xz"
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state: "absent"
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# This is using a shell command because the ansible archive module does not
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# provide for the options needed to properly create an LXC image archive.
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- name: Create lxc image
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shell: |
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tar -Opc -C {{ lxc_image_cache_path }} . | {{ lxc_xz_bin }} -{{ lxc_image_compression_ratio }} -c - > rootfs.tar.xz
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args:
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chdir: "{{ cache_path_fact }}/"
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notify: Destroy base container
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tags:
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- skip_ansible_lint
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- name: Update LXC image meta data
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get_url:
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url: "{{ lxc_image_cache_server }}/{{ item.split(';')[-1] }}/meta.tar.xz"
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dest: "/tmp/meta.tar.xz"
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with_items: "{{ lxc_images }}"
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when:
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- item | match("^{{ cache_index_item }}")
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- name: Place container metadata
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unarchive:
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src: "/tmp/meta.tar.xz"
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dest: "{{ cache_path_fact }}"
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remote_src: True
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- name: Set cache expiry
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shell: "date -d @{{ (cache_time | int) + 31536000 }} > {{ cache_path_fact }}/expiry"
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tags:
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- skip_ansible_lint
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- name: Set build ID
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shell: "echo {{ cache_time }} > {{ cache_path_fact }}/build_id"
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tags:
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- skip_ansible_lint
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- name: Create base container to use for overlayfs containers
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lxc_container:
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name: "{{ lxc_container_base_name }}"
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template: "download"
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state: stopped
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backing_store: "dir"
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template_options: "{{ lxc_cache_download_template_options }}"
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register: cache_download
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retries: 3
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delay: 10
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until: cache_download|success
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environment: "{{ lxc_cache_environment }}"
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when:
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- lxc_container_backing_store is defined
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- lxc_container_backing_store == 'overlayfs'
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- name: Create base container to use for LVM-backed copy-on-write containers
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lxc_container:
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name: "{{ lxc_container_base_name }}"
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template: "download"
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state: stopped
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backing_store: "lvm"
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template_options: "{{ lxc_cache_download_template_options }}"
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register: cache_download
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retries: 3
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delay: 10
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until: cache_download|success
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environment: "{{ lxc_cache_environment }}"
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when:
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- lxc_container_backing_store is defined
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- lxc_container_backing_store == 'lvm'
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- lxc_container_backing_method is defined
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- lxc_container_backing_method == 'copy-on-write'
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