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ansible-inventory-grapher creates a dot file suitable for use by graphviz


  • ansible
  • graphviz

PyPI version Build Status

Getting started

pip install ansible-inventory-grapher


Usage: ansible-inventory-grapher [options] pattern1 [pattern2...]

  --version             show program's version number and exit
  -h, --help            show this help message and exit
  -i INVENTORY          specify inventory host file [/etc/ansible/hosts]
  -d DIRECTORY          Location to output resulting files [current directory]
  -o FORMAT, --format=FORMAT
                        python format string to name output files (e.g.
                        {}.dot) [defaults to stdout]
  -q, --no-variables    Turn off variable display in default template
  -t TEMPLATE           path to jinja2 template used for creating output
  -T                    print default template
  -a ATTRIBUTES         include top-level graphviz attributes from
  --ask-vault-pass      prompt for vault password
                        Location of file with cleartext vault password

Using the example inventory in, we can generate the dot files for two of the example web servers using:

bin/ansible-inventory-grapher -i ../ansible-ec2-example/inventory/hosts \
  prod-web-server-78a prod-web-server-28a \
  -d test --format "test-{hostname}.dot"

You can add the -a option to insert a string with graphviz attributes ( to apply to the root level of the graph. Some fun examples:

# transpose the tree so it grows from left-right instead of top-bottom
-a "rankdir=LR;"

# circular layout, with group nodes shaded grey
-a "layout=circo; overlap=false; splines=polyline;\
  node [ style=filled fillcolor=lightgrey ]"

# orthogonal, UML-like inheritance connectors
-a "rankdir=LR; splines=ortho; ranksep=2;\
  node [ width=5 style=filled fillcolor=lightgrey ];\
  edge [ dir=back arrowtail=empty ];"

You can replace the default template (which can be seen by passing the -T variable to ansible-inventory-grapher) with a template file that can be passed with the -t option.

The resulting graphs can then be converted to pngs using:

for f in test/*.dot ; do dot -Tpng -o test/`basename $f .dot`.png $f; done

Resulting image for prod-web-server-78a

Or the whole thing can now be done in one pipeline (only works for one pattern) straight to image viewer (imagemagick's display in this example)

bin/ansible-inventory-grapher -i ../ansible-ec2-example/inventory/hosts \
  prod-web-server-1a | dot -Tpng | display png:-

This works with valid Ansible patterns now although only hosts and groups have been tested.


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