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Enable delegating all downloads (binaries, images, kubeadm images) (#4420)

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* Download to delegate and sync files when download_run_once

* Fail on error after saving container image

* Do not set changed status when downloaded container was up to date

* Only sync containers when they are actually required

Previously, non-required images (pull_required=false as
image existed on target host) were synced to the target
hosts. This failed as the image was not downloaded to
the download_delegate and hence was not available for
syncing.

* Sync containers when only missing on some hosts

* Consider images with multiple repo tags

* Enable kubeadm images pull/syncing with download_delegate

* Use kubeadm images list to pull/sync

'kubeadm config images pull' is replaced by collecting the images
list with 'kubeadm config images list' and using the commonly
used method of pull/syncing the images.

* Ensure containers are downloaded and synced for all hosts

* Fix download/syncing when download_delegate is a kubernetes host
This commit is contained in:
Timoses
2019-05-01 10:10:56 +02:00
committed by Kubernetes Prow Robot
parent e814da1eec
commit d6fd0d2aca
11 changed files with 188 additions and 50 deletions
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docs/downloads.md
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@@ -12,14 +12,14 @@ Kubespray supports several download/upload modes. The default is:
There is also a "pull once, push many" mode as well:
* Override the ``download_run_once: True`` to download container images only once
* Override the ``download_run_once: True`` to download container images and binaries only once
then push to cluster nodes in batches. The default delegate node
for pushing images is the first `kube-master`.
for pushing is the first `kube-master`.
* If your ansible runner node (aka the admin node) have password-less sudo and
docker enabled, you may want to define the ``download_localhost: True``, which
makes that node a delegate for pushing images while running the deployment with
ansible. This maybe the case if cluster nodes cannot access each over via ssh
or you want to use local docker images as a cache for multiple clusters.
makes that node a delegate for pushing while running the deployment with
ansible. This may be the case if cluster nodes cannot access each other via ssh
or you want to use local docker images and binaries as a cache for multiple clusters.
Container images and binary files are described by the vars like ``foo_version``,
``foo_download_url``, ``foo_checksum`` for binaries and ``foo_image_repo``,