Add service command

This change creates the `floaty service` command with two valid
arguemnts: types and examples

- `floaty service types` prints out a list of valid types for use in a
  service definition in ~/.vmfloaty.yml
- `floaty service examples` prints out example configuration files for
  both a single service and multiple services.

README.md

@@ -14,9 +14,8 @@ A CLI helper tool for [Puppet's vmpooler](https://github.com/puppetlabs/vmpooler
   - [Example workflow](#example-workflow)
   - [vmfloaty dotfile](#vmfloaty-dotfile)
     - [Basic configuration](#basic-configuration)
-    - [Default to Puppet's ABS instead of vmpooler](#default-to-puppets-abs-instead-of-vmpooler)
-    - [Configuring multiple services](#configuring-multiple-services)
-    - [Using a Nonstandard Pooler service](#using-a-nonstandard-pooler-service)
+    - [Using multiple services](#using-multiple-services)
+    - [Using backends besides VMPooler](#using-backends-besides-vmpooler)
     - [Valid config keys](#valid-config-keys)
   - [Tab Completion](#tab-completion)
 - [vmpooler API](#vmpooler-api)
@@ -54,6 +53,7 @@ $ floaty --help
     modify     Modify a VM's tags, time to live, disk space, or reservation reason
     query      Get information about a given vm
     revert     Reverts a vm to a specified snapshot
+    service    Display information about floaty services and their configuration
     snapshot   Takes a snapshot of a given vm
     ssh        Grabs a single vm and sshs into it
     status     Prints the status of pools in the pooler service
@@ -90,10 +90,12 @@ floaty get centos-7-x86_64=2 debian-7-x86_64 windows-10=3 --token mytokenstring
 
 ### vmfloaty dotfile
 
-If you do not wish to continually specify various config options with the cli, you can have a dotfile in your home directory for some defaults. For example:
+If you do not wish to continually specify various config options with the cli, you can `~/.vmfloaty.yml` for some defaults. You can get a list of valid service types and example configuration files via `floaty service types` and `floaty service examples`, respectively.
 
 #### Basic configuration
 
+This is the simplest type of configuration where you only need a single service:
+
 ```yaml
 # file at ~/.vmfloaty.yml
 url: 'https://vmpooler.example.net/api/v1'
@@ -101,92 +103,19 @@ user: 'brian'
 token: 'tokenstring'
 ```
 
-Now vmfloaty will use those config files if no flag was specified.
+Run `floaty service examples` to see additional configuration options
 
-#### Default to Puppet's ABS instead of vmpooler
+#### Using multiple services
 
-When the --service is not specified on the command line, the first one is selected, so put ABS first.
-Also provide a "vmpooler" service that ABS can use as fallback for operations targeting vmpooler directly
-```yaml
-# file at ~/.vmfloaty.yml
-services:
-  abs:
-    url: 'https://abs/api/v2'
-    type: 'abs'
-    user: 'samuel'
-    token: 'foo'
-  vmpooler:
-    url: 'http://vmpooler'
-    user: 'samuel'
-    token: 'bar'
-```
-
-#### Configuring multiple services
-
-Most commands allow you to specify a `--service <servicename>` option to allow the use of multiple vmpooler instances. This can be useful when you'd rather not specify a `--url` or `--token` by hand for alternate services.
-
-To configure multiple services, you can set up your `~/.vmfloaty.yml` config file like this:
-
-```yaml
-# file at /Users/me/.vmfloaty.yml
-user: 'brian'
-services:
-  main:
-    url: 'https://vmpooler.example.net/api/v1'
-    token: 'tokenstring'
-  alternate:
-    url: 'https://vmpooler.example.com/api/v1'
-    token: 'alternate-tokenstring'
-```
+Most commands allow you to specify a `--service <servicename>` option to allow the use of multiple pooler instances. This can be useful when you'd rather not specify a `--url` or `--token` by hand for alternate services.
 
 - If you run `floaty` without a `--service <name>` option, vmfloaty will use the first configured service by default.
-  With the config file above, the default would be to use the 'main' vmpooler instance.
 - If keys are missing for a configured service, vmfloaty will attempt to fall back to the top-level values.
-  With the config file above, 'brian' will be used as the username for both configured services, since neither specifies a username.
+  This makes it so you can specify things like `user` once at the top of your `~/.vmfloaty.yml`.
 
-Examples using the above configuration:
+#### Using backends besides VMPooler
 
-List available vm types from our main vmpooler instance:
-
-```bash
-floaty list --service main
-# or, since the first configured service is used by default:
-floaty list
-```
-
-List available vm types from our alternate vmpooler instance:
-
-```bash
-floaty list --service alternate
-```
-
-#### Using a Nonstandard Pooler service
-
-vmfloaty is capable of working with Puppet's [nonstandard pooler](https://github.com/puppetlabs/nspooler) in addition to the default vmpooler API. To add a nonstandard pooler service, specify an API `type` value in your service configuration, like this:
-
-```yaml
-# file at /Users/me/.vmfloaty.yml
-user: 'brian'
-services:
-  vm:
-    url: 'https://vmpooler.example.net/api/v1'
-    token: 'tokenstring'
-  ns:
-    url: 'https://nspooler.example.net/api/v1'
-    token: 'nspooler-tokenstring'
-    type: 'nonstandard'  # <-- 'type' is necessary for any non-vmpooler service
-  abs:
-    url: 'https://abs.example.net/'
-    token: 'abs-tokenstring'
-    type: 'abs'  # <-- 'type' is necessary for any non-vmpooler service
-
-```
-
-With this configuration, you could list available OS types from nspooler like this:
-
-```bash
-floaty list --service ns
-```
+vmfloaty supports additional backends besides VMPooler. To see a complete list, run `floaty service types`. The output of `floaty service examples` will show you how to configure each of the supported backends.
 
 #### Valid config keys
 
@@ -198,6 +127,7 @@ Here are the keys that vmfloaty currently supports:
 - url (String)
 - services (String)
 - type (String)
+- vmpooler_fallback (String)
 
 ### Tab Completion
 

extras/completions/floaty.bash

@@ -7,7 +7,7 @@ _vmfloaty()
   cur="${COMP_WORDS[COMP_CWORD]}"
   prev="${COMP_WORDS[COMP_CWORD-1]}"
 
-  subcommands="delete get help list modify query revert snapshot ssh status summary token"
+  subcommands="delete get help list modify query revert service snapshot ssh status summary token"
   template_subcommands="get ssh"
   hostname_subcommands="delete modify query revert snapshot"
 

lib/vmfloaty.rb

@@ -497,6 +497,70 @@ class Vmfloaty
       end
     end
 
+    command :service do |c|
+      c.syntax = 'floaty service <types examples>'
+      c.summary = 'Display information about floaty services and their configuration'
+      c.description = 'Display information about floaty services to aid in setting up a configuration file.'
+      c.example 'Print a list of the valid service types', 'floaty service types'
+      c.example 'Print a sample config file with multiple services', 'floaty service examples'
+      c.example 'list vms from the service named "nspooler-prod"', 'floaty list --service nspooler-prod'
+      c.action do |args, options|
+        action = args.first
+
+        example_config = Utils.strip_heredoc(<<-CONFIG)
+          # Sample ~/.vmfloaty.yml with just vmpooler
+          user: 'jdoe'
+          url: 'https://vmpooler.example.net'
+          token: '456def789'
+
+          # Sample ~/.vmfloaty.yml with multiple services
+          # Note: when the --service is not specified on the command line,
+          # the first service listed here is selected automatically
+          user: 'jdoe'
+          services:
+            abs-prod:
+              type: 'abs'
+              url: 'https://abs.example.net/api/v2'
+              token: '123abc456'
+              vmpooler_fallback: 'vmpooler-prod'
+            nspooler-prod:
+              type: 'nspooler'
+              url: 'https://nspooler.example.net'
+              token:  '789ghi012'
+            vmpooler-dev:
+              type: 'vmpooler'
+              url: 'https://vmpooler-dev.example.net'
+              token: '987dsa654'
+            vmpooler-prod:
+              type: 'vmpooler'
+              url: 'https://vmpooler.example.net'
+              token: '456def789'
+
+        CONFIG
+
+        types_output = Utils.strip_heredoc(<<-TYPES)
+          The values on the left below can be used in ~/.vmfloaty.yml as the value of type:
+
+          abs:       Puppet's Always Be Scheduling
+          nspooler:  Puppet's Non-standard Pooler, aka NSPooler
+          vmpooler:  Puppet's VMPooler
+        TYPES
+
+        case action
+        when 'examples'
+          FloatyLogger.info example_config
+        when 'types'
+          FloatyLogger.info types_output
+        when nil
+          FloatyLogger.error 'No action provided'
+          exit 1
+        else
+          FloatyLogger.error "Unknown action: #{action}"
+          exit 1
+        end
+      end
+    end
+
     run!
   end
 end

lib/vmfloaty/utils.rb

@@ -203,12 +203,15 @@ class Utils
   end
 
   def self.get_service_object(type = '')
-    nspooler_strings = %w[ns nspooler nonstandard nonstandard_pooler]
     abs_strings = %w[abs alwaysbescheduling always_be_scheduling]
-    if nspooler_strings.include? type.downcase
-      NonstandardPooler
-    elsif abs_strings.include? type.downcase
+    nspooler_strings = %w[ns nspooler nonstandard nonstandard_pooler]
+    vmpooler_strings = %w[vmpooler]
+    if abs_strings.include? type.downcase
       ABS
+    elsif nspooler_strings.include? type.downcase
+      NonstandardPooler
+    elsif vmpooler_strings.include? type.downcase
+      Pooler
     else
       Pooler
     end

spec/vmfloaty/utils_spec.rb

@@ -77,9 +77,17 @@ describe Utils do
       expect(Utils.get_service_object).to be Pooler
     end
 
+    it 'uses abs when told explicitly' do
+      expect(Utils.get_service_object('abs')).to be ABS
+    end
+
     it 'uses nspooler when told explicitly' do
       expect(Utils.get_service_object('nspooler')).to be NonstandardPooler
     end
+
+    it 'uses vmpooler when told explicitly' do
+      expect(Utils.get_service_object('vmpooler')).to be Pooler
+    end
   end
 
   describe '#get_service_config' do