27 lines
1.1 KiB
ReStructuredText
27 lines
1.1 KiB
ReStructuredText
=======
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kubelet
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=======
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This hook uses the kubelet agent from the kubernetes project to provision
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containers. The StructuredConfig resource data represents a pod of containers
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to be provisioned.
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The files have the following purpose:
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- ``extra-data.d/50-docker-images`` allows an archive file of docker images to
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be included in the dib image
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- ``install.d/50-heat-config-kubelet`` installs kubernetes for redhat based
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distros during dib image build, along with the required systemd and config
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files required to enable a working kubelet service on the host
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- ``install.d/hook-kubelet.py`` polls docker images and containers until the
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expected kubelet-provisioned containers are running (or a timeout occurs)
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- ``os-refresh-config/configure.d/50-heat-config-kubelet`` runs before
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``55-heat-config`` (and the kubelet hook it triggers). This orc script writes
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out all pod definition files for the pods that should currently be running.
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Kubelet is configured to monitor the directory containing these files, so the
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current running containers will change when kubelet acts on these config
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changes
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