feat: support for ostree systems

Feature: Allow running and testing the role with ostree managed nodes.

Reason: We have users who want to use the role to manage ostree
systems.

Result: Users can use the role to manage ostree managed nodes.
Signed-off-by: Rich Megginson <rmeggins@redhat.com>

.ostree/README.md

@@ -0,0 +1,3 @@
+*NOTE*: The `*.txt` files are used by `get_ostree_data.sh` to create the lists
+of packages, and to find other system roles used by this role.  DO NOT use them
+directly.

.ostree/get_ostree_data.sh

@@ -0,0 +1,113 @@
+#!/bin/bash
+
+set -euo pipefail
+
+role_collection_dir="${ROLE_COLLECTION_DIR:-fedora/linux_system_roles}"
+ostree_dir="${OSTREE_DIR:-"$(dirname "$(realpath "$0")")"}"
+
+if [ -z "${4:-}" ] || [ "${1:-}" = help ] || [ "${1:-}" = -h ]; then
+    cat <<EOF
+Usage: $0 packages [runtime|testing] DISTRO-MAJOR[.MINOR] [json|yaml|raw|toml]
+The script will use the packages and roles files in $ostree_dir to
+construct the list of packages needed to build the ostree image.  The script
+will output the list of packages in the given format
+- json is a JSON list like ["pkg1","pkg2",....,"pkgN"]
+- yaml is the YAML list format
+- raw is the list of packages, one per line
+- toml is a list of [[packages]] elements as in https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html-single/composing_installing_and_managing_rhel_for_edge_images/index#creating-an-image-builder-blueprint-for-a-rhel-for-edge-image-using-the-command-line-interface_composing-a-rhel-for-edge-image-using-image-builder-command-line
+The DISTRO-MAJOR.MINOR is the same format used by Ansible for distribution e.g. CentOS-8, RedHat-8.9, etc.
+EOF
+    exit 1
+fi
+category="$1"
+pkgtype="$2"
+distro_ver="$3"
+format="$4"
+pkgtypes=("$pkgtype")
+if [ "$pkgtype" = testing ]; then
+    pkgtypes+=(runtime)
+fi
+
+get_rolepath() {
+    local ostree_dir role rolesdir
+    ostree_dir="$1"
+    role="$2"
+    rolesdir="$(dirname "$(dirname "$ostree_dir")")/$role/.ostree"
+    if [ -d "$rolesdir" ]; then
+        echo "$rolesdir"
+        return 0
+    fi
+    if [ -n "${ANSIBLE_COLLECTIONS_PATHS:-}" ]; then
+        for pth in ${ANSIBLE_COLLECTIONS_PATHS//:/ }; do
+            rolesdir="$pth/ansible_collections/$role_collection_dir/roles/$role/.ostree"
+            if [ -d "$rolesdir" ]; then
+                echo "$rolesdir"
+                return 0
+            fi
+        done
+    fi
+    return 1
+}
+
+get_packages() {
+    local ostree_dir pkgtype pkgfile rolefile
+    ostree_dir="$1"
+    for pkgtype in "${pkgtypes[@]}"; do
+        for suff in "" "-$distro" "-${distro}-${major_ver}" "-${distro}-${ver}"; do
+            pkgfile="$ostree_dir/packages-${pkgtype}${suff}.txt"
+            if [ -f "$pkgfile" ]; then
+                cat "$pkgfile"
+            fi
+        done
+        rolefile="$ostree_dir/roles-${pkgtype}.txt"
+        if [ -f "$rolefile" ]; then
+            local roles role rolepath
+            roles="$(cat "$rolefile")"
+            for role in $roles; do
+                rolepath="$(get_rolepath "$ostree_dir" "$role")"
+                get_packages "$rolepath"
+            done
+        fi
+    done | sort -u
+}
+
+format_packages_json() {
+    local comma pkgs pkg
+    comma=""
+    pkgs="["
+    while read -r pkg; do
+        pkgs="${pkgs}${comma}\"${pkg}\""
+        comma=,
+    done
+    pkgs="${pkgs}]"
+    echo "$pkgs"
+}
+
+format_packages_raw() {
+    cat
+}
+
+format_packages_yaml() {
+    while read -r pkg; do
+        echo "- $pkg"
+    done
+}
+
+format_packages_toml() {
+    while read -r pkg; do
+        echo "[[packages]]"
+        echo "name = \"$pkg\""
+        echo "version = \"*\""
+    done
+}
+
+distro="${distro_ver%%-*}"
+ver="${distro_ver##*-}"
+if [[ "$ver" =~ ^([0-9]*) ]]; then
+    major_ver="${BASH_REMATCH[1]}"
+else
+    echo ERROR: cannot parse major version number from version "$ver"
+    exit 1
+fi
+
+"get_$category" "$ostree_dir" | "format_${category}_$format"

.ostree/packages-runtime-CentOS-7.txt

@@ -0,0 +1,2 @@
+python-blivet3
+python-enum34

.ostree/packages-runtime-CentOS-8.txt

@@ -0,0 +1,3 @@
+kmod-kvdo
+python3-blivet
+vdo

.ostree/packages-runtime-CentOS-9.txt

@@ -0,0 +1,3 @@
+kmod-kvdo
+python3-blivet
+vdo

.ostree/packages-runtime-Fedora.txt

@@ -0,0 +1 @@
+python3-blivet

.ostree/packages-runtime-RedHat-7.txt

@@ -0,0 +1,2 @@
+python-blivet3
+python-enum34

.ostree/packages-runtime-RedHat-8.txt

@@ -0,0 +1,3 @@
+kmod-kvdo
+python3-blivet
+vdo

.ostree/packages-runtime-RedHat-9.txt

@@ -0,0 +1,3 @@
+kmod-kvdo
+python3-blivet
+vdo

.ostree/packages-runtime.txt

@@ -0,0 +1,9 @@
+cryptsetup
+e2fsprogs
+libblockdev-crypto
+libblockdev-dm
+libblockdev-lvm
+libblockdev-mdraid
+libblockdev-swap
+lvm2
+xfsprogs

.ostree/packages-testing-CentOS-7.txt

@@ -0,0 +1 @@
+dracut-fips

.ostree/packages-testing-Fedora.txt

@@ -0,0 +1 @@
+nilfs-utils

.ostree/packages-testing-RedHat-7.txt

@@ -0,0 +1 @@
+dracut-fips

.ostree/packages-testing.txt

@@ -0,0 +1,2 @@
+bc
+cryptsetup

.sanity-ansible-ignore-2.10.txt

@@ -25,3 +25,4 @@ tests/storage/scripts/generate_tests.py future-import-boilerplate!skip
 tests/storage/scripts/generate_tests.py shebang!skip
 tests/storage/scripts/post-commit shebang!skip
 tests/storage/scripts/pre-commit shebang!skip
+roles/storage/.ostree/get_ostree_data.sh shebang!skip

.sanity-ansible-ignore-2.11.txt

@@ -26,3 +26,4 @@ tests/storage/scripts/generate_tests.py future-import-boilerplate!skip
 tests/storage/scripts/generate_tests.py shebang!skip
 tests/storage/scripts/post-commit shebang!skip
 tests/storage/scripts/pre-commit shebang!skip
+roles/storage/.ostree/get_ostree_data.sh shebang!skip

.sanity-ansible-ignore-2.12.txt

@@ -41,3 +41,4 @@ plugins/module_utils/storage_lsr/size.py pylint!skip
 tests/storage/scripts/generate_tests.py shebang!skip
 tests/storage/scripts/post-commit shebang!skip
 tests/storage/scripts/pre-commit shebang!skip
+roles/storage/.ostree/get_ostree_data.sh shebang!skip

.sanity-ansible-ignore-2.13.txt

@@ -41,3 +41,4 @@ plugins/module_utils/storage_lsr/size.py pylint!skip
 tests/storage/scripts/generate_tests.py shebang!skip
 tests/storage/scripts/post-commit shebang!skip
 tests/storage/scripts/pre-commit shebang!skip
+roles/storage/.ostree/get_ostree_data.sh shebang!skip

.sanity-ansible-ignore-2.14.txt

@@ -38,3 +38,4 @@ plugins/module_utils/storage_lsr/size.py pylint!skip
 tests/storage/scripts/generate_tests.py shebang!skip
 tests/storage/scripts/post-commit shebang!skip
 tests/storage/scripts/pre-commit shebang!skip
+roles/storage/.ostree/get_ostree_data.sh shebang!skip

.sanity-ansible-ignore-2.15.txt

@@ -38,3 +38,4 @@ plugins/module_utils/storage_lsr/size.py pylint!skip
 tests/storage/scripts/generate_tests.py shebang!skip
 tests/storage/scripts/post-commit shebang!skip
 tests/storage/scripts/pre-commit shebang!skip
+roles/storage/.ostree/get_ostree_data.sh shebang!skip

.sanity-ansible-ignore-2.9.txt

@@ -18,3 +18,4 @@ tests/storage/scripts/generate_tests.py future-import-boilerplate!skip
 tests/storage/scripts/generate_tests.py shebang!skip
 tests/storage/scripts/post-commit shebang!skip
 tests/storage/scripts/pre-commit shebang!skip
+roles/storage/.ostree/get_ostree_data.sh shebang!skip

README-ostree.md

@@ -0,0 +1,66 @@
+# rpm-ostree
+
+The role supports running on [rpm-ostree](https://coreos.github.io/rpm-ostree/)
+systems. The primary issue is that the `/usr` filesystem is read-only, and the
+role cannot install packages. Instead, it will just verify that the necessary
+packages and any other `/usr` files are pre-installed. The role will change the
+package manager to one that is compatible with `rpm-ostree` systems.
+
+## Building
+
+To build an ostree image for a particular operating system distribution and
+version, use the script `.ostree/get_ostree_data.sh` to get the list of
+packages. If the role uses other system roles, then the script will include the
+packages for the other roles in the list it outputs.  The list of packages will
+be sorted in alphanumeric order.
+
+Usage:
+
+```bash
+.ostree/get_ostree_data.sh packages runtime DISTRO-VERSION FORMAT
+```
+
+`DISTRO-VERSION` is in the format that Ansible uses for `ansible_distribution`
+and `ansible_distribution_version` - for example, `Fedora-38`, `CentOS-8`,
+`RedHat-9.4`
+
+`FORMAT` is one of `toml`, `json`, `yaml`, `raw`
+
+* `toml` - each package in a TOML `[[packages]]` element
+
+```toml
+[[packages]]
+name = "package-a"
+version = "*"
+[[packages]]
+name = "package-b"
+version = "*"
+...
+```
+
+* `yaml` - a YAML list of packages
+
+```yaml
+- package-a
+- package-b
+...
+```
+
+* `json` - a JSON list of packages
+
+```json
+["package-a","package-b",...]
+```
+
+* `raw` - a plain text list of packages, one per line
+
+```bash
+package-a
+package-b
+...
+```
+
+What format you choose depends on which image builder you are using.  For
+example, if you are using something based on
+[osbuild-composer](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html-single/composing_installing_and_managing_rhel_for_edge_images/index#creating-an-image-builder-blueprint-for-a-rhel-for-edge-image-using-the-command-line-interface_composing-a-rhel-for-edge-image-using-image-builder-command-line),
+you will probably want to use the `toml` output format.

README.md

@@ -15,16 +15,13 @@ See below
 
 ### Collection requirements
 
-The role requires the `mount` module from `ansible.posix`.  If you are using
-`ansible-core`, you must install the `ansible.posix` collection.
+The role requires external collections.  Use the following command to install
+them:
 
 ```bash
 ansible-galaxy collection install -vv -r meta/collection-requirements.yml
 ```
 
-If you are using Ansible Engine 2.9, or are using an Ansible bundle which
-includes these collections/modules, you should have to do nothing.
-
 ## Role Variables
 
 __NOTE__: Beginning with version 1.3.0, unspecified parameters are interpreted
@@ -358,6 +355,10 @@ platforms with "buggy" udev.
 
 ```
 
+## rpm-ostree
+
+See README-ostree.md
+
 ## License
 
 MIT

meta/collection-requirements.yml

@@ -1,3 +1,4 @@
 ---
 collections:
   - name: ansible.posix
+  - name: ansible.utils

tasks/set_vars.yml

@@ -19,3 +19,21 @@
   vars:
     __vars_file: "{{ role_path }}/vars/{{ item }}"
   when: __vars_file is file
+
+- name: Ensure correct package manager for ostree systems
+  vars:
+    ostree_pkg_mgr: ansible.posix.rhel_rpm_ostree
+    ostree_booted_file: /run/ostree-booted
+  when: ansible_facts.pkg_mgr | d("") != ostree_pkg_mgr
+  block:
+    - name: Check if system is ostree
+      stat:
+        path: "{{ ostree_booted_file }}"
+      register: __ostree_booted_stat
+
+    - name: Set package manager to use for ostree
+      ansible.utils.update_fact:
+        updates:
+          - path: ansible_facts.pkg_mgr
+            value: "{{ ostree_pkg_mgr }}"
+      when: __ostree_booted_stat.stat.exists