Dustin C. Hatch
0f600b9e6e
So far, I have been managing Kubernetes worker nodes with Fedora CoreOS Ignition, but I have decided to move everything back to Fedora and Ansible. I like the idea of an immutable operating system, but the FCOS implementation is not really what I want. I like the automated updates, but that can be accomplished with _dnf-automatic_. I do _not_ like giving up control of when to upgrade to the next Fedora release. Mostly, I never did come up with a good way to manage application-level configuration on FCOS machines. None of my experiments (Cue+tmpl, KCL+etcd+Luci) were successful, which mostly resulted in my manually managing configuration on nodes individually. Managing OS-level configuration is also rather cumbersome, since it requires redeploying the machine entirely. Altogether, I just don't think FCOS fits with my model of managing systems. This commit introduces a new playbook, `kubernetes.yml`, and a handful of new roles to manage Kubernetes worker nodes running Fedora Linux. It also adds two new deploy scripts, `k8s-worker.sh` and `k8s-longhorn.sh`, which fully automate the process of bringing up worker nodes.
31 lines
697 B
YAML
31 lines
697 B
YAML
- name: stat /var/lib/kubelet/config.yaml
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stat:
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path: /var/lib/kubelet/config.yaml
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ignore_errors: true
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register: stat_kublet_config
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tags:
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- kubeadm-join
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- name: generate bootstrap token
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delegate_to: '{{ groups["k8s-controller"][0] }}'
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command:
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kubeadm token create
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--kubeconfig /etc/kubernetes/admin.conf
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--ttl 1h
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--print-join-command
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when:
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not stat_kublet_config.stat.exists
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changed_when: true
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register: kubeadm_token_create
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tags:
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- bootstrap-token
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- kubeadm-join
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- name: join the kubernetes cluster
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command: >-
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{{ kubeadm_token_create.stdout }}
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when:
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not stat_kublet_config.stat.exists
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changed_when: true
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tags:
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- kubeadm-join
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