REF: switch from host_inventory.yaml to LCLS-style directory structure

.gitignore

@@ -1,7 +1,7 @@
 .DS_Store
 *_rsa
 *.pub
-# Only include the template:
-/host_inventory.yaml
+# Only include the templates here.
+/host_vars/*/*.yml
 TCBSD*.vdi
 TCBSD*.iso

Makefile

@@ -1,8 +1,9 @@
 # This is the IP address of the PLC.
 PLC_IP           ?=
-PLC_HOSTNAME     ?= my-plcname
+PLC_HOSTNAME     ?= test-plc-01
 PLC_NET_ID       ?= $(PLC_IP).1.1
 PLC_USERNAME     ?= Administrator
+PLC_HOST_VARS    = host_vars/$(PLC_HOSTNAME)/vars.yml
 SSH_KEY_FILENAME ?= $(shell pwd)/tcbsd_key_rsa
 
 # This auto-detects your local adapter's IP address. It may be completely wrong.
@@ -43,16 +44,17 @@ ssh-setup:
 ssh:
 	ssh -i "$(SSH_KEY_FILENAME)" "$(PLC_USERNAME)@$(PLC_IP)" $(SSH_ARGS)
 
-host_inventory.yaml: Makefile host_inventory.yaml.template
+$(PLC_HOST_VARS): Makefile tcbsd-plc.yaml.template
 	# This substitutes our local environment into ``host_inventory.yaml.template``
 	# and writes ``host_inventory.yaml``
-	envsubst < "host_inventory.yaml.template" > "$@"
+	@mkdir -p $(shell dirname "$@")
+	envsubst < "tcbsd-plc.yaml.template" > "$@"
 
-run-bootstrap: host_inventory.yaml tcbsd-bootstrap-playbook.yaml
-	ansible-playbook tcbsd-bootstrap-playbook.yaml -i host_inventory.yaml
+run-bootstrap: $(PLC_HOST_VARS) tcbsd-bootstrap-playbook.yaml
+	ansible-playbook tcbsd-bootstrap-playbook.yaml
 
-run-provision: run-bootstrap host_inventory.yaml tcbsd-provision-playbook.yaml
-	ansible-playbook tcbsd-provision-playbook.yaml -i host_inventory.yaml
+run-provision: run-bootstrap tcbsd-provision-playbook.yaml
+	ansible-playbook tcbsd-provision-playbook.yaml
 
 add-route:
 	# NOTE: the add_route script lazily uses environment variables instead of

README.md

@@ -1,12 +1,30 @@
 ## twincat-bsd-ansible-testing
 
+twincat-bsd-ansible-testing: trying out ansible for provisioning TwinCAT BSD PLCs.
+
 ### Install requirements
 
-* VirtualBox
-* TwinCAT BSD image from Beckhoff
+If you have a physical PLC to use, you'll only need the following:
+
 * bash
 * ansible
-* ``gettext`` to interpolate the host inventory template
+* ``gettext`` to interpolate the host variable template
+
+To work using a PLC Virtual Machine (i.e., without a physical PLC), you'll also
+need the following:
+
+* VirtualBox
+* TwinCAT BSD image from Beckhoff
+
+### TcBSD Documentation
+
+Here's some documentation from Beckhoff on the OS:
+
+[TwinCAT_BSD_en.pdf](https://download.beckhoff.com/download/Document/ipc/embedded-pc/embedded-pc-cx/TwinCAT_BSD_en.pdf)
+
+And their security recommendations:
+
+[IPC_Security_Guideline_TwinCATBSD_en.pdf](https://download.beckhoff.com/download/document/product-security/Guidelines/IPC_Security_Guideline_TwinCATBSD_en.pdf)
 
 ### Create a VirtualBox VM
 
@@ -90,12 +108,12 @@ This will generate a VM with:
 Run:
 
 1. ``make ssh-setup`` (SSH key + initial login)
-2. ``make host_inventory.yaml`` (create host inventory configuration file)
+2. ``make host_vars/test-plc-01/vars.yml`` (create host variable configuration file)
 3. ``make run-bootstrap`` (install Python on the PLC, required for ansible)
 4. ``make run-provision`` (provision the PLC)
 
 
-## Side notes
+## Side notes / flight rules
 
 ### ADS
 
@@ -109,3 +127,13 @@ Try:
 $ meson setup build -Dcpp_std=c++14
 $ make
 ```
+
+### I have multiple PLCs with different roles, where do I put that information?
+
+Per-PLC configuration goes in [host_vars/](host_vars).
+Overall configuration for the "tcbsd_plc" role goes in
+[group_vars/tcbsd_plcs/](group_vars/tcbsd_plcs/).
+
+The host inventory can be restructured to have whatever hierarchy you so choose;
+take a look at the [ansible](https://www.ansible.com/) documentation for further
+details.

ansible.cfg

@@ -0,0 +1,4 @@
+[defaults]
+inventory = ./inventory/
+deprecation_warnings = True
+role_path = ./roles

group_vars/tcbsd_plcs/vars.yml

@@ -0,0 +1,36 @@
+---
+ansible_user: Administrator
+ansible_ssh_private_key_file: /Users/klauer/Repos/twincat-bsd-ansible-testing/tcbsd_key_rsa
+ansible_become: true
+ansible_become_method: doas
+ansible_become_password: 1  # TODO: vault
+ansible_python_interpreter: /usr/local/bin/python3
+
+# This is the default of 32MB. Set to 67108864 for 64MB of router memory.
+tc_locked_memory_size_bytes: 33554432
+
+# Heap memory size is not specified by default. If you wish to change the
+# default, set this to greater than 0 (e.g., 1024).  This must be
+# greater than the locked memory size for the router, above.
+tc_heap_memory_size_mb: 0
+# Install and use bash in place of sh:
+tc_use_bash: true
+# Install C/C++ development tools (approximately 1.8GB):
+tc_install_cpp_dev_tools: true
+
+# Install these additional packages:
+tc_packages_to_install:
+  - git
+  - vim
+  - ripgrep
+
+# Configure the following static routes (and only those):
+# NOTE: if you don't want to run my arbitrary module, use this instead
+# of tc_add_missing_static_routes below
+tc_set_fixed_static_routes: []
+
+# Alternatively, only add missing routes from the list:
+tc_add_missing_static_routes:
+  - name: PC98125
+    address: 192.168.2.110
+    net_id: 192.168.2.110.1.1

inventory/plcs.yaml

@@ -0,0 +1,8 @@
+---
+plcs:
+  children:
+    tcbsd_plcs:
+
+tcbsd_plcs:
+  hosts:
+    test-plc-01:

tcbsd-bootstrap-playbook.yaml

@@ -1,5 +1,5 @@
 ---
-- hosts: plcs
+- hosts: tcbsd_plcs
   gather_facts: False
 
   tasks:

tcbsd-plc.yaml.template

@@ -0,0 +1,3 @@
+---
+ansible_host: ${PLC_IP}
+tc_ams_net_id: ${PLC_NET_ID}

tcbsd-provision-playbook.yaml

@@ -1,5 +1,5 @@
 ---
-- hosts: plcs
+- hosts: tcbsd_plcs
 
   tasks:
     - name: Verify connectivity with ping