# Uses Cases

## Use Cases

* [Neutron](http://superuser.openstack.org/articles/everything-you-need-to-know-to-get-started-with-neutron-f90e2797-26b7-4d1c-84d8-effef03f11d2/)

## Use Cases :: Drones

Images

1. Ardupilot
2. DroneKit Copter
3. DroneKit Python
4. QGroundControl

Distros

1. Lubuntu
2. Ubuntu Server

## Use Cases :: Drones :: Ubuntu Image

1. Change Cloud Image credentials
2. [Generate User Password in Ubuntu Cloud Image](http://www.yamansertdemir.com/?p=55)

```bash
user@workstation:~$ cd Downloads
user@workstation:~/Downloads$ wget http://cloud-images.ubuntu.com/releases/16.04/release/ubuntu-16.04-server-cloudimg-amd64.tar.gz
```

```bash
user@workstation:~/Downloads$ sudo apt-get install libguestfs-tool
user@workstation:~/Downloads$ guestfish --rw -a xenial-server-cloudimg-amd64-disk1.img 

Welcome to guestfish, the guest filesystem shell for
editing virtual machine filesystems and disk images.

Type: 'help' for help on commands
      'man' to read the manual
      'quit' to quit the shell

><fs> run
><fs> list-filesystems
/dev/sda1: ext4
><fs> mount /dev/sda1 /
><fs> vi /etc/cloud/cloud.cfg
><fs> exit

user@workstation:~/Downloads$
```

/etc/cloud/cloud.cfg

```bash
# The top level settings are used as module
# and system configuration.

# A set of users which may be applied and/or used by various modules
# when a 'default' entry is found it will reference the 'default_user'
# from the distro configuration specified below

users:
   - default
   - name: ubuntu
     lock-passwd: false
     plain_text_passwd: 'ubuntu'

# If this is set, 'root' will not be able to ssh in and they
# will get a message to login instead as the default $user
disable_root: true

# This will cause the set+update hostname module to not operate (if true)
preserve_hostname: false

# Example datasource config
# datasource:
#    Ec2:
#      metadata_urls: [ 'blah.com' ]
#      timeout: 5 # (defaults to 50 seconds)
#      max_wait: 10 # (defaults to 120 seconds)

# The modules that run in the 'init' stage
cloud_init_modules:
 - migrator
 - seed_random
 - bootcmd
 - write-files
 - growpart
 - resizefs
 - disk_setup
 - mounts
 - set_hostname
 - update_hostname
 - update_etc_hosts
 - ca-certs
 - rsyslog
 - users-groups
 - ssh

# The modules that run in the 'config' stage
cloud_config_modules:
# Emit the cloud config ready event
# this can be used by upstart jobs for 'start on cloud-config'.
 - emit_upstart
 - snap_config
 - ssh-import-id
 - locale
 - set-passwords
 - grub-dpkg
 - apt-pipelining
 - apt-configure
 - ntp
 - timezone
 - disable-ec2-metadata
 - runcmd
 - byobu

# The modules that run in the 'final' stage
cloud_final_modules:
 - snappy
 - package-update-upgrade-install
 - fan
 - landscape
 - lxd
 - puppet
 - chef
 - salt-minion
 - mcollective
 - rightscale_userdata
 - scripts-vendor
 - scripts-per-once
 - scripts-per-boot
 - scripts-per-instance
 - scripts-user
 - ssh-authkey-fingerprints
 - keys-to-console
 - phone-home
 - final-message
 - power-state-change

# System and/or distro specific settings
# (not accessible to handlers/transforms)
system_info:
   # This will affect which distro class gets used
   distro: ubuntu
   # Default user name + that default users groups (if added/used)
   default_user:
     name: ubuntu
     gecos: Ubuntu
     groups: [adm, audio, cdrom, dialout, dip, floppy, lxd, netdev, plugdev, sudo, video]
     sudo: ["ALL=(ALL) NOPASSWD:ALL"]
     shell: /bin/bash
   # Other config here will be given to the distro class and/or path classes
   paths:
      cloud_dir: /var/lib/cloud/
      templates_dir: /etc/cloud/templates/
      upstart_dir: /etc/init/
   package_mirrors:
     - arches: [i386, amd64]
       failsafe:
         primary: http://archive.ubuntu.com/ubuntu
         security: http://security.ubuntu.com/ubuntu
       search:
         primary:
           - http://%(ec2_region)s.ec2.archive.ubuntu.com/ubuntu/
           - http://%(availability_zone)s.clouds.archive.ubuntu.com/ubuntu/
           - http://%(region)s.clouds.archive.ubuntu.com/ubuntu/
         security: []
     - arches: [armhf, armel, default]
       failsafe:
         primary: http://ports.ubuntu.com/ubuntu-ports
         security: http://ports.ubuntu.com/ubuntu-ports
   ssh_svcname: ssh
```

1. Change Hostname

```bash
ubuntu@ubuntu:~$ hostname
ubuntu
ubuntu@ubuntu:~$ vi /etc/hosts
127.0.0.1 ubuntu
```

1. On Virtual Machine, change nameservers

```bash
ubuntu@ubuntu:~$ vi /etc/resolvconf/resolv.conf.d/base
nameserver 8.8.8.8 8.8.4.4
ubuntu@ubuntu:~$ sudo resolvconf -u
```

1. Create snapshot
2. Download image
3. [Snapshots](https://docs.openstack.org/mitaka/user-guide/cli_use_snapshots_to_migrate_instances.html)
4. Enable SSH Server

```
stack@workstation:~/devstack$ cat userrc_early 
# Use this for debugging issues before files in accrc are created

# Set up password auth credentials now that Keystone is bootstrapped
export OS_IDENTITY_API_VERSION=3
export OS_AUTH_URL=http://192.168.1.83/identity
export OS_USERNAME=admin
export OS_USER_DOMAIN_ID=default
export OS_PASSWORD=admin
export OS_PROJECT_NAME=admin
export OS_PROJECT_DOMAIN_ID=default
export OS_REGION_NAME=RegionOne

stack@workstation:~/devstack$ source userrc_early 
stack@workstation:~/devstack$ glance image-list
+--------------------------------------+---------------------------+
| ID                                   | Name                      |
+--------------------------------------+---------------------------+
| bad12c2e-645d-4453-b7da-f3c78a9d0a5c | cirros-0.3.5-x86_64-disk  |
| e867d2a4-d4d3-446c-84c6-70b0ec4ca9a4 | ubuntu                    |
| 7a652931-1836-4489-805f-09e11a21890f | usecases.drone.ubuntu.one |
+--------------------------------------+---------------------------+
stack@workstation:~/devstack$
```

Not Working!

```bash
stack@workstation:~/devstack$ glance image-download --file usecases.drone.ubuntu.one.img 7a652931-1836-4489-805f-09e11a21890f
```

```bash
stack@workstation:~/devstack$ glance --os-image-api-version 2 image-create --container-format bare --disk-format qcow2 --copy-from usecases.drone.ubuntu.one-img
```

1. Clone Bitol Repository

```bash
ubuntu@ubuntu:~$ git clone https://github.com/TheIoTLearningInitiative/Bitol.git
ubuntu@ubuntu:~$ cd Bitol/SoftwareDevelopmentEnvironment/
ubuntu@ubuntu:~/Bitol/SoftwareDevelopmentEnvironment/$ bash Ardupilot.sh
```

Did not work to change password, do not follow these instructions

```bash
user@workstation:~/Downloads$ sudo apt install bzr
user@workstation:~/Downloads$ bzr branch lp:~smoser/+junk/backdoor-image
You have not informed bzr of your Launchpad ID, and you must do this to
write to Launchpad or access private data.  See "bzr help launchpad-login".
Branched 37 revisions.                                                                                                                       
user@workstation:~/Downloads$
```

```bash
user@workstation:~/Downloads$ sh backdoor-image --user ubuntu --password ubuntu --password-auth xenial-server-cloudimg-amd64-disk1.img 
user@workstation:~/Downloads$
```


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