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porting some information from kubeadm-init.md to kubelet-integration.md (#15423) 

* porting some information from kubeadm-init.md to kubelet-integration.md doc

from reference/setup-tools/kubeadm/kubeadm-init.md to setup/production-environment/tools/kubeadm/kubelet-integration.md

includes edits I just proposed in #15421 and #80136

* improve wording re. systemd in kubelet-integration.md

* removing quotes and adding the in kubelet-integration.md

* Update content/en/docs/setup/production-environment/tools/kubeadm/kubelet-integration.md

Co-Authored-By: Lubomir I. Ivanov <neolit123@gmail.com>
This commit is contained in:
Michael Vorburger ⛑️ 2019-08-06 02:09:54 +02:00 committed by Kubernetes Prow Robot
parent d4a3eaa2f5
commit da9db0b0c4
1 changed files with 6 additions and 2 deletions
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content/en/docs/setup/production-environment/tools/kubeadm/kubelet-integration.md
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@ -157,15 +157,19 @@ has finished performing the TLS Bootstrap.
## The kubelet drop-in file for systemd
The configuration file installed by the kubeadm DEB or RPM package is written to
kubeadm ships with configuration for how systemd should run the kubelet.
Note that the kubeadm CLI command never touches this drop-in file.
This configuration file installed by the `kubeadm` [DEB](https://github.com/kubernetes/kubernetes/blob/master/build/debs/10-kubeadm.conf) or [RPM package](https://github.com/kubernetes/kubernetes/blob/master/build/rpms/10-kubeadm.conf) is written to
`/etc/systemd/system/kubelet.service.d/10-kubeadm.conf` and is used by systemd.
It augments the basic [`kubelet.service` for RPM](https://github.com/kubernetes/kubernetes/blob/master/build/rpms/kubelet.service) (resp. [`kubelet.service` for DEB](https://github.com/kubernetes/kubernetes/blob/master/build/debs/kubelet.service))):
```none
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf
--kubeconfig=/etc/kubernetes/kubelet.conf"
Environment="KUBELET_CONFIG_ARGS=--config=/var/lib/kubelet/config.yaml"
# This is a file that "kubeadm init" and "kubeadm join" generates at runtime, populating
# This is a file that "kubeadm init" and "kubeadm join" generate at runtime, populating
the KUBELET_KUBEADM_ARGS variable dynamically
EnvironmentFile=-/var/lib/kubelet/kubeadm-flags.env
# This is a file that the user can use for overrides of the kubelet args as a last resort. Preferably,