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authorChad Smith <chad.smith@canonical.com>2020-03-10 08:22:22 -0600
committerGitHub <noreply@github.com>2020-03-10 10:22:22 -0400
commit71af48df3514ca831c90b77dc71ba0a121dec401 (patch)
treea8fb89da80df6b119bffeb66ad162c6192f37803 /tox.ini
parent1f860e5ac7ebb5b809c72d8703a0b7cb3e84ccd0 (diff)
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instance-data: add cloud-init merged_cfg and sys_info keys to json (#214)
Cloud-config userdata provided as jinja templates are now distro, platform and merged cloud config aware. The cloud-init query command will also surface this config data. Now users can selectively render portions of cloud-config based on: * distro name, version, release * python version * merged cloud config values * machine platform * kernel To support template handling of this config, add new top-level keys to /run/cloud-init/instance-data.json. The new 'merged_cfg' key represents merged cloud config from /etc/cloud/cloud.cfg and /etc/cloud/cloud.cfg.d/*. The new 'sys_info' key which captures distro and platform info from cloudinit.util.system_info. Cloud config userdata templates can render conditional content based on these additional environmental checks such as the following simple example: ``` ## template: jinja #cloud-config runcmd: {% if distro == 'opensuse' %} - sh /custom-setup-sles {% elif distro == 'centos' %} - sh /custom-setup-centos {% elif distro == 'debian' %} - sh /custom-setup-debian {% endif %} ``` To see all values: sudo cloud-init query --all Any keys added to the standardized v1 keys are guaranteed to not change or drop on future released of cloud-init. 'v1' keys will be retained for backward-compatibility even if a new standardized 'v2' set of keys are introduced The following standardized v1 keys are added: * distro, distro_release, distro_version, kernel_version, machine, python_version, system_platform, variant LP: #1865969
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