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Darko Poljak d597339c5e update beta docs
2019-03-30 19:37:24 +01:00

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<li class="toctree-l1"><a class="reference internal" href="cdist-intro.html">1. cdist - usable configuration management</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#introduction">19.1. Introduction</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#configuring-hosts-using-inventory">19.4. Configuring hosts using inventory</a></li>
<li class="toctree-l2"><a class="reference internal" href="#examples">19.5. Examples</a></li>
<li class="toctree-l2"><a class="reference internal" href="#example-of-manipulating-database">19.6. Example of manipulating database</a></li>
<li class="toctree-l2"><a class="reference internal" href="#using-external-inventory">19.7. Using external inventory</a></li>
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<div class="section" id="inventory">
<h1>19. Inventory<a class="headerlink" href="#inventory" title="Permalink to this headline"></a></h1>
<div class="section" id="introduction">
<h2>19.1. Introduction<a class="headerlink" href="#introduction" title="Permalink to this headline"></a></h2>
<p>cdist comes with simple built-in tag based inventory. It is a simple inventory
with list of hosts and a host has a list of tags.
Inventory functionality is still in <strong>beta</strong> so it can be used only if beta
command line flag is specified (-b, --beta) or setting CDIST_BETA env var.</p>
</div>
<div class="section" id="description">
<h2>19.2. Description<a class="headerlink" href="#description" title="Permalink to this headline"></a></h2>
<p>The idea is to have simple tagging inventory. There is a list of hosts and for
each host there are tags. Inventory database is a set of files under inventory
database base directory. Filename equals hostname. Each file contains tags for
hostname with each tag on its own line.</p>
<p>Using inventory you can now configure hosts by selecting them by tags.</p>
<p>Tags have no values, as tags are just tags. Tag name-value would in this
context mean that host has two tags and it is selected by specifying that both
tags are present.</p>
<p>This inventory is <strong>KISS</strong> cdist built-in inventory database. You can maintain it
using cdist inventory interface or using standard UNIX tools.</p>
</div>
<div class="section" id="cdist-inventory-interface">
<h2>19.3. cdist inventory interface<a class="headerlink" href="#cdist-inventory-interface" title="Permalink to this headline"></a></h2>
<p>With cdist inventory interface you can list host(s) and tag(s), add host(s),
add tag(s), delete host(s) and delete tag(s).</p>
</div>
<div class="section" id="configuring-hosts-using-inventory">
<h2>19.4. Configuring hosts using inventory<a class="headerlink" href="#configuring-hosts-using-inventory" title="Permalink to this headline"></a></h2>
<p>config command now has new options, <strong>-t</strong>, <strong>-a</strong> and <strong>-A</strong>.</p>
<p><strong>-A</strong> means that all hosts in tag db is selected.</p>
<p><strong>-a</strong> means that selected hosts must contain ALL specified tags.</p>
<p><strong>-t</strong> means that host specifies tag - all hosts that have specified tags are
selected.</p>
</div>
<div class="section" id="examples">
<h2>19.5. Examples<a class="headerlink" href="#examples" title="Permalink to this headline"></a></h2>
<div class="highlight-sh notranslate"><div class="highlight"><pre><span></span><span class="c1"># List inventory content</span>
$ cdist inventory list -b
<span class="c1"># List inventory for specified host localhost</span>
$ cdist inventory list -b localhost
<span class="c1"># List inventory for specified tag loadbalancer</span>
$ cdist inventory list -b -t loadbalancer
<span class="c1"># Add hosts to inventory</span>
$ cdist inventory add-host -b web1 web2 web3
<span class="c1"># Delete hosts from file old-hosts from inventory</span>
$ cdist inventory del-host -b -f old-hosts
<span class="c1"># Add tags to specified hosts</span>
$ cdist inventory add-tag -b -t europe,croatia,web,static web1 web2
<span class="c1"># Add tag to all hosts in inventory</span>
$ cdist inventory add-tag -b -t vm
<span class="c1"># Delete all tags from specified host</span>
$ cdist inventory del-tag -b -a localhost
<span class="c1"># Delete tags read from stdin from hosts specified by file hosts</span>
$ cdist inventory del-tag -b -T - -f hosts
<span class="c1"># Configure hosts from inventory with any of specified tags</span>
$ cdist config -b -t web dynamic
<span class="c1"># Configure hosts from inventory with all specified tags</span>
$ cdist config -b -t -a web dynamic
<span class="c1"># Configure all hosts from inventory db</span>
$ cdist config -b -A
</pre></div>
</div>
</div>
<div class="section" id="example-of-manipulating-database">
<h2>19.6. Example of manipulating database<a class="headerlink" href="#example-of-manipulating-database" title="Permalink to this headline"></a></h2>
<div class="highlight-sh notranslate"><div class="highlight"><pre><span></span>$ python3 scripts/cdist inventory list -b
$ python3 scripts/cdist inventory add-host -b localhost
$ python3 scripts/cdist inventory add-host -b test.mycloud.net
$ python3 scripts/cdist inventory list -b
localhost
test.mycloud.net
$ python3 scripts/cdist inventory add-host -b web1.mycloud.net web2.mycloud.net shell1.mycloud.net shell2.mycloud.net
$ python3 scripts/cdist inventory list -b
localhost
test.mycloud.net
web1.mycloud.net
web2.mycloud.net
shell1.mycloud.net
shell2.mycloud.net
$ python3 scripts/cdist inventory add-tag -b -t web web1.mycloud.net web2.mycloud.net
$ python3 scripts/cdist inventory add-tag -b -t shell shell1.mycloud.net shell2.mycloud.net
$ python3 scripts/cdist inventory add-tag -b -t cloud
$ python3 scripts/cdist inventory list -b
localhost cloud
test.mycloud.net cloud
web1.mycloud.net cloud,web
web2.mycloud.net cloud,web
shell1.mycloud.net cloud,shell
shell2.mycloud.net cloud,shell
$ python3 scripts/cdist inventory add-tag -b -t test,web,shell test.mycloud.net
$ python3 scripts/cdist inventory list -b
localhost cloud
test.mycloud.net cloud,shell,test,web
web1.mycloud.net cloud,web
web2.mycloud.net cloud,web
shell1.mycloud.net cloud,shell
shell2.mycloud.net cloud,shell
$ python3 scripts/cdist inventory del-tag -b -t shell test.mycloud.net
$ python3 scripts/cdist inventory list -b
localhost cloud
test.mycloud.net cloud,test,web
web1.mycloud.net cloud,web
web2.mycloud.net cloud,web
shell1.mycloud.net cloud,shell
shell2.mycloud.net cloud,shell
$ python3 scripts/cdist inventory add-tag -b -t all
$ python3 scripts/cdist inventory add-tag -b -t mistake
$ python3 scripts/cdist inventory list -b
localhost all,cloud,mistake
test.mycloud.net all,cloud,mistake,test,web
web1.mycloud.net all,cloud,mistake,web
web2.mycloud.net all,cloud,mistake,web
shell1.mycloud.net all,cloud,mistake,shell
shell2.mycloud.net all,cloud,mistake,shell
$ python3 scripts/cdist inventory del-tag -b -t mistake
$ python3 scripts/cdist inventory list -b
localhost all,cloud
test.mycloud.net all,cloud,test,web
web1.mycloud.net all,cloud,web
web2.mycloud.net all,cloud,web
shell1.mycloud.net all,cloud,shell
shell2.mycloud.net all,cloud,shell
$ python3 scripts/cdist inventory del-host -b localhost
$ python3 scripts/cdist inventory list -b
test.mycloud.net all,cloud,test,web
web1.mycloud.net all,cloud,web
web2.mycloud.net all,cloud,web
shell1.mycloud.net all,cloud,shell
shell2.mycloud.net all,cloud,shell
$ python3 scripts/cdist inventory list -b -t web
test.mycloud.net all,cloud,test,web
web1.mycloud.net all,cloud,web
web2.mycloud.net all,cloud,web
$ python3 scripts/cdist inventory list -b -t -a web <span class="nb">test</span>
test.mycloud.net all,cloud,test,web
$ python3 scripts/cdist inventory list -b -t -a web all
test.mycloud.net all,cloud,test,web
web1.mycloud.net all,cloud,web
web2.mycloud.net all,cloud,web
$ python3 scripts/cdist inventory list -b -t web all
test.mycloud.net all,cloud,test,web
web1.mycloud.net all,cloud,web
web2.mycloud.net all,cloud,web
shell1.mycloud.net all,cloud,shell
shell2.mycloud.net all,cloud,shell
$ <span class="nb">cd</span> cdist/inventory
$ ls -1
shell1.mycloud.net
shell2.mycloud.net
test.mycloud.net
web1.mycloud.net
web2.mycloud.net
$ ls -l
total <span class="m">20</span>
-rw-r--r-- <span class="m">1</span> darko darko <span class="m">16</span> Jun <span class="m">24</span> <span class="m">12</span>:43 shell1.mycloud.net
-rw-r--r-- <span class="m">1</span> darko darko <span class="m">16</span> Jun <span class="m">24</span> <span class="m">12</span>:43 shell2.mycloud.net
-rw-r--r-- <span class="m">1</span> darko darko <span class="m">19</span> Jun <span class="m">24</span> <span class="m">12</span>:43 test.mycloud.net
-rw-r--r-- <span class="m">1</span> darko darko <span class="m">14</span> Jun <span class="m">24</span> <span class="m">12</span>:43 web1.mycloud.net
-rw-r--r-- <span class="m">1</span> darko darko <span class="m">14</span> Jun <span class="m">24</span> <span class="m">12</span>:43 web2.mycloud.net
$ cat test.mycloud.net
<span class="nb">test</span>
all
web
cloud
$ cat web2.mycloud.net
all
web
cloud
</pre></div>
</div>
<p>For more info about inventory commands and options see <a class="reference external" href="man1/cdist.html">cdist</a>(1).</p>
</div>
<div class="section" id="using-external-inventory">
<h2>19.7. Using external inventory<a class="headerlink" href="#using-external-inventory" title="Permalink to this headline"></a></h2>
<p>cdist can be used with any external inventory where external inventory is
some storage or database from which you can get a list of hosts to configure.
cdist can then be fed with this list of hosts through stdin or file using
<strong>-f</strong> option. For example, if your host list is stored in sqlite3 database
hosts.db and you want to select hosts which purpose is <strong>django</strong> then you
can use it with cdist like:</p>
<div class="highlight-sh notranslate"><div class="highlight"><pre><span></span>$ sqlite3 hosts.db <span class="s2">&quot;select hostname from hosts where purpose = &#39;django&#39;;&quot;</span> <span class="p">|</span> cdist config
</pre></div>
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