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fleet

WIP for managing a collection of docker hosts

#Vagrant

##Prerequisites

  • VM must be connected using a private network
  • Every hostname must resolve to 127.0.0.1 (adding 127.0.0.1 hostX to /etc/hosts do the work)
  • The inventory file inventory-vagrant must include the ssh port forwarded in Vagrantfile
host1 ansible_ssh_port=2251 host_id=1 other_hosts="192.168.50.102 192.168.50.103"
host2 ansible_ssh_port=2252 host_id=2 other_hosts="192.168.50.101" dns_leader=10.10.1.1
host3 ansible_ssh_port=2253 host_id=3 other_hosts="192.168.50.101" dns_leader=10.10.1.1

##Configure the servers as docker's hosts

vagrant up

ANSIBLE_HOST_KEY_CHECKING=False ansible-playbook --user=vagrant --private-key=~/.vagrant.d/insecure_private_key --inventory-file=inventory-vagrant ansible-playbooks/docker.yml

#Digital Ocean

##Prerequisites

  • SSH access for root user added to ssh-agent
  • SSH access for ubuntu user added to ssh-agent
  • SSH public key to configure ubuntu user in ssh_keys/authorized_keys_for_ubuntu file
  • The inventory file inventory-dig-ocean must have the following format
public_ip_address_host_1 host_id=1 other_hosts="private_ip_address_host_2 private_ip_address_host_3"
public_ip_address_host_2 host_id=2 other_hosts="private_ip_address_host_1" dns_leader=10.10.1.1
public_ip_address_host_3 host_id=3 other_hosts="private_ip_address_host_1" dns_leader=10.10.1.1

##Prepare the servers

ANSIBLE_HOST_KEY_CHECKING=False ansible-playbook --inventory-file=inventory-dig-ocean ansible-playbooks/prepare-digital-ocean-server.yml

##Configure the servers as docker's hosts

ANSIBLE_HOST_KEY_CHECKING=False ansible-playbook --user=ubuntu --inventory-file=inventory-dig-ocean ansible-playbooks/docker.yml

#Notes

  • The host 1 will act as network concentrator, all traffic will pass through it.
  • The docker service will be available in IP address 10.10.X.1, X is the host_id
  • The containers in host X will have an IP address like 10.10.X.Y, X is the host_id
  • The dns_leader parameter must point point to the ip of the docker bridge

ENJOY!

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WIP for managing a collection of docker hosts

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