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Fix linux_reboot: use /proc/1/environ container=lxc for reliable LXC detection across all distros

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Semaphore
2026-03-12 22:49:12 -07:00
parent a1905f2225
commit d9d250021d
1 changed files with 7 additions and 9 deletions
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16
playbooks/linux_reboot.yml
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@@ -12,18 +12,17 @@
changed_when: false changed_when: false
- name: Detect if running inside an LXC container - name: Detect if running inside an LXC container
# Works on both Debian and Alpine — checks /proc/1/environ for container=lxc
# This is set by the Proxmox LXC runtime and is reliable across distros
ansible.builtin.shell: | ansible.builtin.shell: |
grep -q 'lxc' /proc/1/environ 2>/dev/null \ cat /proc/1/environ | tr '\0' '\n' | grep -q '^container=lxc' && echo "lxc" || echo "none"
|| systemd-detect-virt --quiet --container 2>/dev/null \
|| [ -f /run/.containerenv ] \
&& echo "lxc" || echo "not-lxc"
register: virt_detect register: virt_detect
changed_when: false changed_when: false
failed_when: false failed_when: false
- name: Set is_lxc fact - name: Set is_lxc fact
ansible.builtin.set_fact: ansible.builtin.set_fact:
is_lxc: "{{ 'lxc' in virt_detect.stdout }}" is_lxc: "{{ virt_detect.stdout | trim == 'lxc' }}"
# ── Debian/Ubuntu ────────────────────────────────────────────────────────── # ── Debian/Ubuntu ──────────────────────────────────────────────────────────
- name: Get installed kernel version (Debian/Ubuntu) - name: Get installed kernel version (Debian/Ubuntu)
@@ -36,8 +35,6 @@
when: ansible_os_family == "Debian" when: ansible_os_family == "Debian"
- name: Normalize installed kernel version (Debian/Ubuntu) - name: Normalize installed kernel version (Debian/Ubuntu)
# dpkg reports e.g. "6.12.74-2", uname -r reports "6.12.74+deb13+1-amd64"
# Extract just the base X.Y.Z for comparison
ansible.builtin.set_fact: ansible.builtin.set_fact:
installed_kernel_version: "{{ installed_kernel_deb.stdout | trim }}" installed_kernel_version: "{{ installed_kernel_deb.stdout | trim }}"
installed_kernel_base: "{{ installed_kernel_deb.stdout | trim | regex_replace('^(\\d+\\.\\d+\\.\\d+).*', '\\1') }}" installed_kernel_base: "{{ installed_kernel_deb.stdout | trim | regex_replace('^(\\d+\\.\\d+\\.\\d+).*', '\\1') }}"
@@ -76,8 +73,8 @@
running_kernel_base: "{{ running_kernel.stdout | trim | regex_replace('^(\\d+\\.\\d+\\.\\d+).*', '\\1') }}" running_kernel_base: "{{ running_kernel.stdout | trim | regex_replace('^(\\d+\\.\\d+\\.\\d+).*', '\\1') }}"
when: ansible_os_family == "RedHat" when: ansible_os_family == "RedHat"
# ── Fallbacks ────────────────────────────────────────────────────────────── # ── Fallback ───────────────────────────────────────────────────────────────
- name: Set fallback for unknown/LXC hosts - name: Set fallback for unknown hosts
ansible.builtin.set_fact: ansible.builtin.set_fact:
installed_kernel_version: "unknown" installed_kernel_version: "unknown"
installed_kernel_base: "unknown" installed_kernel_base: "unknown"
@@ -101,6 +98,7 @@
{{ inventory_hostname }}: {{ inventory_hostname }}:
running={{ running_kernel.stdout | trim }} (base={{ running_kernel_base }}), running={{ running_kernel.stdout | trim }} (base={{ running_kernel_base }}),
installed={{ installed_kernel_version }} (base={{ installed_kernel_base }}), installed={{ installed_kernel_version }} (base={{ installed_kernel_base }}),
virt={{ virt_detect.stdout | trim }},
is_lxc={{ is_lxc }}, is_lxc={{ is_lxc }},
reboot_needed={{ reboot_needed }}, reboot_needed={{ reboot_needed }},
force_reboot={{ force_reboot }} force_reboot={{ force_reboot }}