This snippet is a cloud-init to prepare kubernetes nodes and masters before the kubeadm init script. just boring work of apt and users

cloud-init-mongo.yaml

users:
  - default
  - name: ubuntu
    gecos: Ubuntu
    sudo: ALL=(ALL) NOPASSWD:ALL
    groups: users, admin, docker
    shell: /bin/bash
    ssh_import_id: None
    lock_passwd: true
    ssh_authorized_keys:
      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDG0U7+ofHS17yk9k9eE0LvPElIQEHpuCoVOHtzy+kRv2LAblw+KyxIBUvjspOUX2gIx4+i3azUXhnI5P90lJWPacsRpXgQKiu1KejloWSnlY+gNkPrs2V+eglMQ2KW13H1v659Kq0C3/IhRtNFwDtM3yWhcFS+XeD5V2sRzB/8KifXz7Fbdl61Ky8tKwguwlq2WTaewLAeL6lO/8s4h+j/UKOIS7TvvQx7fJzydv2CZlUH0+PuFQbv6iDRy6dSSlkYXDX6Rv289M+5bM+eT02XnAdJO2ybXZz0oZk0fcAzid+LxkQ2/1/WqwE33R+NiZt+VDSfIXSgJKsG1r0Rkv2H andretapxure@MacBook-Air-de-Andre-2.local

apt:
  sources:
    mongodb-org-4.2:
      source: "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.2 multiverse"
      key: |
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        =UXPP
        -----END PGP PUBLIC KEY BLOCK-----
package_update: true
package_upgrade: true
packages:
  - mongodb-org
write_files:
  - content: |
      172.16.29.84  mongo1.solidops.local mongo1
      172.16.29.85  mongo2.solidops.local mongo2
      172.16.29.86  mongo3.solidops.local mongo3
    path:  /etc/cloud/templates/hosts.debian.tmpl
    append: true
runcmd:
  - sudo systemctl enable mongod.service
  - sudo systemctl daemon-reload
  - sudo systemctl restart mongod.service
  #- sudo echo "172.16.29.84  mongo1.solidops.local mongo1" >> /etc/hosts
  #- sudo echo "172.16.29.85  mongo2.solidops.local mongo2" >> /etc/hosts
  #- sudo echo "172.16.29.86  mongo3.solidops.local mongo3" >> /etc/hosts