Destination /etc/default/kubelet does not exist - kubernetes

Question

I am trying to install kubernetes cluster with vagrant and ansible and it does not work.
As the error message, I've got:
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.
The vagrant file:
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
and the master-playbook.yml file
---
- 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
and the 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
What is wrong? Why the kubelet file can not be found?

Answer 1

The error occurs, because /etc/default/kubelet does not exist on the VMs. Add create: yes to the "Configure node ip" tasks in master-playbook.yml and node-playbook.yml, so that they look like this:
- name: Configure node ip
lineinfile:
path: /etc/default/kubelet
line: KUBELET_EXTRA_ARGS=--node-ip={{ node_ip }}
create: yes
This way, the file will be created if it does not exist.

Answer 2

I found this generic ansible-playbook I see at git that generally follows the official manual. Initially, it was created (half year ago?) for ubuntu 16.04. I tried to run (instructions from official manual) against ubuntu 18 (as you using bionic), but I should say, there is no /etc/default/kubelet installed (after apt install ...).
Update:
And here is why...
P.S.
I would suggest using Kubespray as local vagrant/kubernetes setup, but it's because it just works from the box.

Answer 3

You are following the tutorial on kubernetes.io.
I got the same error as you:
"Destination /etc/default/kubelet does not exist".
Just look at the instructions here.
You need to adjust the playbook slightly to the other instructions:
Change the line: 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" according to the other instruction to kubeadm init --pod-network-cidr=192.168.0.0/16 --apiserver-advertise-address="192.168.50.10"
The result will be a join command that you need to register and re-use to join the two worker nodes.

Answer 4

I had the same error last time:
TASK [Configure node ip]
*******************************************************
fatal: [k8s-master]: FAILED! => {"changed": false, "msg": "Destination
/etc/default/kubelet does not exist !", "rc": 257}
So please check your ansible-playbook and verify that the kubelet will be installed. If not please add create parameter:
create: yes
So in your case, it should look like this:
- name: Configure node ip
lineinfile:
path: /etc/default/kubelet
line: KUBELET_EXTRA_ARGS=--node-ip={{ node_ip }}
create: yes