Simplify K3s service startup for HA
Signed-off-by: Derek Nola <derek.nola@suse.com>
This commit is contained in:
parent
565c9fa049
commit
20afd4f19e
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@ -28,10 +28,10 @@ def provision(vm, role, node_num)
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ansible.extra_vars = {
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k3s_version: "v1.26.5+k3s1",
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api_endpoint: "#{NETWORK_PREFIX}.100",
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token: "myyagrant",
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token: "myvagrant",
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# Required to use the private network configured above
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extra_server_args: "--node-external-ip #{node_ip} --flannel-iface eth1",
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extra_agent_args: "",
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extra_agent_args: "--node-external-ip #{node_ip} --flannel-iface eth1",
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}
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end
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end
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@ -12,5 +12,5 @@
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ansible.builtin.systemd:
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name: k3s-agent
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daemon_reload: true
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state: restarted
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state: started
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enabled: true
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@ -1,13 +1,17 @@
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[Unit]
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Description=Lightweight Kubernetes
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Documentation=https://k3s.io
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Wants=network-online.target
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After=network-online.target
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[Install]
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WantedBy=multi-user.target
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[Service]
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Type=notify
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ExecStartPre=-/sbin/modprobe br_netfilter
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ExecStartPre=-/sbin/modprobe overlay
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ExecStart=/usr/local/bin/k3s agent --data-dir {{ k3s_server_location }} --server https://{{ api_endpoint }}:{{ api_port }} --token {{ token }} {{ extra_agent_args }}
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EnvironmentFile=-/etc/default/%N
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EnvironmentFile=-/etc/sysconfig/%N
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EnvironmentFile=-/etc/systemd/system/k3s.service.env
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KillMode=process
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Delegate=yes
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# Having non-zero Limit*s causes performance problems due to accounting overhead
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@ -19,6 +23,7 @@ TasksMax=infinity
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TimeoutStartSec=0
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Restart=always
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RestartSec=5s
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[Install]
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WantedBy=multi-user.target
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ExecStartPre=/bin/sh -xc '! /usr/bin/systemctl is-enabled --quiet nm-cloud-setup.service'
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ExecStartPre=-/sbin/modprobe br_netfilter
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ExecStartPre=-/sbin/modprobe overlay
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ExecStart=/usr/local/bin/k3s agent --data-dir {{ k3s_server_location }} --server https://{{ api_endpoint }}:{{ api_port }} --token {{ token }} {{ extra_agent_args }}
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@ -2,22 +2,30 @@
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- name: Init first server node
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when: ansible_hostname == groups['server'][0]
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block:
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- name: Start temporary service for HA cluster
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ansible.builtin.command:
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cmd: >
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systemd-run -p RestartSec=2 -p Restart=on-failure --unit=k3s-init k3s server
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--cluster-init --token {{ token }} --tls-san {{ api_endpoint }} --data-dir {{ k3s_server_location }} {{ extra_server_args}}
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# noqa: jinja[spacing]
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creates: "{{ k3s_server_location }}/server/node-token"
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when: groups['server'] | length > 1
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- name: Start temporary service for single server cluster
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ansible.builtin.command:
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cmd: >
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systemd-run -p RestartSec=2 -p Restart=on-failure --unit=k3s-init k3s server
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--token {{ token }} --tls-san {{ api_endpoint }} --data-dir {{ k3s_server_location }} {{ extra_server_args }}
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creates: "{{ k3s_server_location }}/server/node-token"
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- name: Copy K3s service file [Single]
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when: groups['server'] | length == 1
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ansible.builtin.template:
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src: "k3s-single.service.j2"
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dest: "{{ systemd_dir }}/k3s.service"
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owner: root
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group: root
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mode: 0644
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- name: Copy K3s service file [HA]
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when: groups['server'] | length > 1
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ansible.builtin.template:
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src: "k3s-cluster-init.service.j2"
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dest: "{{ systemd_dir }}/k3s.service"
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owner: root
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group: root
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mode: 0644
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- name: Enable and check K3s service
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ansible.builtin.systemd:
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name: k3s
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daemon_reload: true
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state: started
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enabled: true
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- name: Create directory .kube
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ansible.builtin.file:
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@ -26,6 +34,10 @@
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owner: "{{ ansible_user }}"
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mode: "u=rwx,g=rx,o="
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- name: Pause to allow server startup
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ansible.builtin.pause:
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seconds: 10
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- name: Copy config file to user home directory
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ansible.builtin.copy:
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src: /etc/rancher/k3s/k3s.yaml
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@ -48,15 +60,25 @@
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flat: true
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- name: Start other server if any and verify status
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when:
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- (groups['server'] | length) > 1
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- ansible_hostname != groups['server'][0]
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block:
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- name: Init additonal server nodes
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ansible.builtin.command:
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cmd: >
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systemd-run -p RestartSec=2 -p Restart=on-failure --unit=k3s-init k3s server
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--token "{{ hostvars[groups['server'][0]]['token'] }}" --server https://{{ api_endpoint }}:{{ api_port }}
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--tls-san {{ api_endpoint }} --data-dir {{ k3s_server_location }} {{ extra_server_args }}
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creates: "{{ k3s_server_location }}/server/node-token"
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when: ansible_hostname != groups['server'][0]
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- name: Copy K3s service file [HA]
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when: groups['server'] | length > 1
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ansible.builtin.template:
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src: "k3s-ha.service.j2"
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dest: "{{ systemd_dir }}/k3s.service"
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owner: root
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group: root
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mode: 0644
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- name: Enable and check K3s service
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ansible.builtin.systemd:
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name: k3s
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daemon_reload: true
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state: started
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enabled: true
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- name: Verify that all server nodes joined
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when: (groups['server'] | length) > 1
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@ -68,28 +90,6 @@
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retries: 20
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delay: 10
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changed_when: false
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always:
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- name: Kill the temporary init service
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ansible.builtin.systemd:
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name: k3s-init
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state: stopped
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failed_when: false
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- name: Copy K3s service file
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ansible.builtin.template:
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src: "k3s-server.service.j2"
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dest: "{{ systemd_dir }}/k3s-server.service"
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owner: root
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group: root
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mode: 0644
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register: k3s_service
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- name: Enable and check K3s service
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ansible.builtin.systemd:
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name: k3s-server
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daemon_reload: true
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state: restarted
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enabled: true
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- name: Create symlinks
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ansible.builtin.file:
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@ -0,0 +1,28 @@
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[Unit]
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Description=Lightweight Kubernetes
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Documentation=https://k3s.io
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Wants=network-online.target
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After=network-online.target
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[Install]
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WantedBy=multi-user.target
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[Service]
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Type=notify
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EnvironmentFile=-/etc/default/%N
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EnvironmentFile=-/etc/sysconfig/%N
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EnvironmentFile=-/etc/systemd/system/k3s.service.env
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KillMode=process
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Delegate=yes
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# Having non-zero Limit*s causes performance problems due to accounting overhead
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# in the kernel. We recommend using cgroups to do container-local accounting.
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LimitNOFILE=1048576
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LimitNPROC=infinity
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LimitCORE=infinity
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TasksMax=infinity
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TimeoutStartSec=0
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Restart=always
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RestartSec=5s
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ExecStartPre=-/sbin/modprobe br_netfilter
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ExecStartPre=-/sbin/modprobe overlay
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ExecStart=/usr/local/bin/k3s server --cluster-init --data-dir {{ k3s_server_location }} --token {{ token }} {{ extra_server_args }}
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@ -0,0 +1,28 @@
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[Unit]
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Description=Lightweight Kubernetes
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Documentation=https://k3s.io
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Wants=network-online.target
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After=network-online.target
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[Install]
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WantedBy=multi-user.target
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[Service]
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Type=notify
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EnvironmentFile=-/etc/default/%N
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EnvironmentFile=-/etc/sysconfig/%N
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EnvironmentFile=-/etc/systemd/system/k3s.service.env
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KillMode=process
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Delegate=yes
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# Having non-zero Limit*s causes performance problems due to accounting overhead
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# in the kernel. We recommend using cgroups to do container-local accounting.
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LimitNOFILE=1048576
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LimitNPROC=infinity
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LimitCORE=infinity
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TasksMax=infinity
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TimeoutStartSec=0
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Restart=always
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RestartSec=5s
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ExecStartPre=-/sbin/modprobe br_netfilter
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ExecStartPre=-/sbin/modprobe overlay
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ExecStart=/usr/local/bin/k3s server --data-dir {{ k3s_server_location }} --server https://{{ api_endpoint }}:{{ api_port }} --token {{ token }} {{ extra_server_args }}
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@ -1,13 +1,17 @@
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[Unit]
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Description=Lightweight Kubernetes
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Documentation=https://k3s.io
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Wants=network-online.target
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After=network-online.target
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[Install]
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WantedBy=multi-user.target
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[Service]
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Type=notify
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ExecStartPre=-/sbin/modprobe br_netfilter
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ExecStartPre=-/sbin/modprobe overlay
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ExecStart=/usr/local/bin/k3s server --data-dir {{ k3s_server_location }} {{ extra_server_args }} --token {{ token }}
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EnvironmentFile=-/etc/default/%N
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EnvironmentFile=-/etc/sysconfig/%N
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EnvironmentFile=-/etc/systemd/system/k3s.service.env
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KillMode=process
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Delegate=yes
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# Having non-zero Limit*s causes performance problems due to accounting overhead
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@ -19,6 +23,6 @@ TasksMax=infinity
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TimeoutStartSec=0
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Restart=always
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RestartSec=5s
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[Install]
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WantedBy=multi-user.target
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ExecStartPre=-/sbin/modprobe br_netfilter
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ExecStartPre=-/sbin/modprobe overlay
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ExecStart=/usr/local/bin/k3s server --data-dir {{ k3s_server_location }} --token {{ token }} {{ extra_server_args }}
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@ -59,12 +59,6 @@
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validate: 'visudo -cf %s'
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when: ansible_distribution in ['CentOS', 'Red Hat Enterprise Linux','RedHat']
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- name: Make k3s directory
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ansible.builtin.file:
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path: "/var/lib/rancher"
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mode: 0755
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state: directory
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- name: Create symlink
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ansible.builtin.file:
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dest: /var/lib/rancher/k3s
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