目标/ etc / default / kubelet不存在

Question

我正在尝试使用流浪汉和ansible安装kubernetes集群，但它不起作用。 作为错误消息，我得到：

TASK [Configure node ip] *******************************************************
fatal: [k8s-node-3]: FAILED! => {"changed": false, "msg": "Destination /etc/default/kubelet does not exist !", "rc": 257}

RUNNING HANDLER [docker status] ************************************************

PLAY RECAP *********************************************************************
k8s-node-3                 : ok=10   changed=8    unreachable=0    failed=1    skipped=1    rescued=0    ignored=0   

Ansible failed to complete successfully. Any error output should be
visible above. Please fix these errors and try again. 

流浪者文件：

IMAGE_NAME = "ubuntu/bionic64"
Nodes = 3


Vagrant.configure("2") do |config|
    config.ssh.insert_key = false

    config.vm.provider "virtualbox" do |v|
        v.memory = 1024
        v.cpus = 2
    end

    config.vm.define "k8s-master" do |master|
        master.vm.box = IMAGE_NAME
        master.vm.network "private_network", ip: "192.168.99.100", name: "vboxnet0", adapter: 2 
        master.vm.hostname = "k8s-master"
        master.vm.provision "ansible" do |ansible|
            ansible.playbook = "k8s-setup/master-playbook.yml"
            ansible.extra_vars = {
                node_ip: "192.168.99.100",
            }
        end
    end

    (1..Nodes).each do |i|
        config.vm.define "k8s-node-#{i}" do |node|
            node.vm.box = IMAGE_NAME
            node.vm.network "private_network", ip: "192.168.99.#{100 + i}", name: "vboxnet0", adapter: 2 
            node.vm.hostname = "k8s-node-#{i}"
            node.vm.provision "ansible" do |ansible|
                ansible.playbook = "k8s-setup/node-playbook.yml"
                ansible.extra_vars = {
                    node_ip: "192.168.99.#{100 + i}",
                }
            end
        end
    end

end

和master-playbook.yml文件

---
- hosts: all
  become: true
  tasks:
  - name: Install packages that allow apt to be used over HTTPS
    apt:
      name: "{{ packages }}"
      state: present
      update_cache: yes
    vars:
      packages:
      - apt-transport-https
      - ca-certificates
      - curl
      - gnupg-agent
      - software-properties-common

  - name: Add an apt signing key for Docker
    apt_key:
      url: https://download.docker.com/linux/ubuntu/gpg
      state: present

  - name: Add apt repository for stable version
    apt_repository:
      repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
      state: present

  - name: Install docker and its dependecies
    apt: 
      name: "{{ packages }}"
      state: present
      update_cache: yes
    vars:
      packages:
      - docker-ce 
      - docker-ce-cli 
      - containerd.io
    notify:
      - docker status

  - name: Add vagrant user to docker group
    user:
      name: vagrant
      group: docker

  - name: Remove swapfile from /etc/fstab
    mount:
      name: "{{ item }}"
      fstype: swap
      state: absent
    with_items:
      - swap
      - none

  - name: Disable swap
    command: swapoff -a
    when: ansible_swaptotal_mb > 0

  - name: Add an apt signing key for Kubernetes
    apt_key:
      url: https://packages.cloud.google.com/apt/doc/apt-key.gpg
      state: present

  - name: Adding apt repository for Kubernetes
    apt_repository:
      repo: deb https://apt.kubernetes.io/ kubernetes-xenial main
      state: present
      filename: kubernetes.list

  - name: Install Kubernetes binaries
    apt: 
      name: "{{ packages }}"
      state: present
      update_cache: yes
    vars:
      packages:
        - kubelet 
        - kubeadm 
        - kubectl

  - name: Configure node ip
    lineinfile:
      path: /etc/default/kubelet
      line: KUBELET_EXTRA_ARGS=--node-ip={{ node_ip }}

  - name: Restart kubelet
    service:
      name: kubelet
      daemon_reload: yes
      state: restarted

  - name: Initialize the Kubernetes cluster using kubeadm
    command: kubeadm init --apiserver-advertise-address="192.168.99.100" --apiserver-cert-extra-sans="192.168.99.100"  --node-name k8s-master --pod-network-cidr=192.168.0.0/16

  - name: Setup kubeconfig for vagrant user
    command: "{{ item }}"
    with_items:
     - mkdir -p /home/vagrant/.kube
     - cp -i /etc/kubernetes/admin.conf /home/vagrant/.kube/config
     - chown vagrant:vagrant /home/vagrant/.kube/config

  - name: Install calico pod network
    become: false
    command: kubectl create -f https://docs.projectcalico.org/v3.4/getting-started/kubernetes/installation/hosted/calico.yaml

  - name: Generate join command
    command: kubeadm token create --print-join-command
    register: join_command

  - name: Copy join command to local file
    local_action: copy content="{{ join_command.stdout_lines[0] }}" dest="./join-command"

  handlers:
    - name: docker status
      service: name=docker state=started

和node-playbook.yml

---
- hosts: all
  become: true
  tasks:
  - name: Install packages that allow apt to be used over HTTPS
    apt:
      name: "{{ packages }}"
      state: present
      update_cache: yes
    vars:
      packages:
      - apt-transport-https
      - ca-certificates
      - curl
      - gnupg-agent
      - software-properties-common

  - name: Add an apt signing key for Docker
    apt_key:
      url: https://download.docker.com/linux/ubuntu/gpg
      state: present

  - name: Add apt repository for stable version
    apt_repository:
      repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
      state: present

  - name: Install docker and its dependecies
    apt: 
      name: "{{ packages }}"
      state: present
      update_cache: yes
    vars:
      packages:
      - docker-ce 
      - docker-ce-cli 
      - containerd.io
    notify:
      - docker status

  - name: Add vagrant user to docker group
    user:
      name: vagrant
      group: docker

  - name: Remove swapfile from /etc/fstab
    mount:
      name: "{{ item }}"
      fstype: swap
      state: absent
    with_items:
      - swap
      - none

  - name: Disable swap
    command: swapoff -a
    when: ansible_swaptotal_mb > 0

  - name: Add an apt signing key for Kubernetes
    apt_key:
      url: https://packages.cloud.google.com/apt/doc/apt-key.gpg
      state: present

  - name: Adding apt repository for Kubernetes
    apt_repository:
      repo: deb https://apt.kubernetes.io/ kubernetes-xenial main
      state: present
      filename: kubernetes.list

  - name: Install Kubernetes binaries
    apt: 
      name: "{{ packages }}"
      state: present
      update_cache: yes
    vars:
      packages:
        - kubelet 
        - kubeadm 
        - kubectl

  - name: Configure node ip
    lineinfile:
      path: /etc/default/kubelet
      line: KUBELET_EXTRA_ARGS=--node-ip={{ node_ip }}

  - name: Restart kubelet
    service:
      name: kubelet
      daemon_reload: yes
      state: restarted

  - name: Copy the join command to server location
    copy: src=join-command dest=/tmp/join-command.sh mode=0777

  - name: Join the node to cluster
    command: sh /tmp/join-command.sh

  handlers:
  - name: docker status
    service: name=docker state=starte

怎么了？为什么找不到kubelet文件？

Answer 1

发生错误，因为在虚拟机上不存在/etc/default/kubelet。将create: yes添加到master-playbook.yml和node-playbook.yml中的“配置节点ip”任务中，使它们看起来像这样：

  - name: Configure node ip
    lineinfile:
      path: /etc/default/kubelet
      line: KUBELET_EXTRA_ARGS=--node-ip={{ node_ip }}
      create: yes

这样，如果文件不存在，则会创建该文件。

Answer 2

我在git上发现的generic ansible-playbook通常遵循official manual。最初，它是为ubuntu 16.04创建的（半年前？）。我尝试针对ubuntu 18（使用仿生设备）运行（官方手册中的说明），但是我应该说，没有安装/etc/default/kubelet（after apt install ...）。

更新：

还有here is why ...

P.S。 我建议使用Kubespray作为本地无业游民/ kubernetes的安装程序，但这是因为它仅在包装盒中起作用。

Answer 3

您正在关注kubernetes.io上的教程。

我和你有同样的错误：

“目标/ etc / default / kubelet不存在”。

只需查看说明here。 您需要根据其他说明对剧本进行一些调整：

• 根据另一条说明将行：kubeadm init --apiserver-advertise-address="192.168.50.10" --apiserver-cert-extra-sans="192.168.50.10" --node-name k8s-master --pod-network-cidr=192.168.0.0/16"更改为kubeadm init --pod-network-cidr=192.168.0.0/16 --apiserver-advertise-address="192.168.50.10"

结果将是一个联接命令，您需要注册该联接命令并重新使用它才能联接两个工作程序节点。