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https://github.com/techno-tim/k3s-ansible.git
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Techno Tim
56bb912bd3
k3s recommends swap be disabled on every node. Add a disable_swap toggle (default true) to the prereq role that turns swap off now and comments out the swap entries in /etc/fstab so swap stays off across reboots. The change is applied uniformly across all k3s_cluster hosts (all-or-nothing) since leaving swap on for some nodes but not others creates uneven scheduling and latency. - roles/prereq/defaults/main.yml: add disable_swap: true default - roles/prereq/tasks/main.yml: idempotent swapoff -a and fstab comment-out block gated on disable_swap - inventory/sample/group_vars/all.yml: document the new sample variable - README.md: document the disable_swap option - .github/scripts/test-disable-swap.sh: regression test - .pre-commit-config.yaml: wire the test into pre-commit Closes #670
38 lines
1.1 KiB
Bash
Executable File
38 lines
1.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -Eeuo pipefail
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repo_root="$(git rev-parse --show-toplevel)"
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prereq_defaults="$repo_root/roles/prereq/defaults/main.yml"
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prereq_tasks="$repo_root/roles/prereq/tasks/main.yml"
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# #670: k3s recommends swap be disabled on all nodes. The prereq role must expose
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# a disable_swap toggle (defaulting to true) that turns swap off now and comments
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# out the /etc/fstab swap entries so swap stays off across reboots.
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grep -Eq -- '^disable_swap: true' "$prereq_defaults" || {
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printf 'prereq defaults are missing disable_swap: true\n' >&2
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exit 1
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}
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grep -Fq -- 'Disable swap on all cluster nodes' "$prereq_tasks" || {
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printf 'prereq tasks are missing the swap-disable block\n' >&2
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exit 1
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}
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grep -Fq -- 'swapoff -a' "$prereq_tasks" || {
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printf 'swap-disable block does not run swapoff -a\n' >&2
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exit 1
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}
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grep -Fq -- '/etc/fstab' "$prereq_tasks" || {
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printf 'swap-disable block does not comment out /etc/fstab swap entries\n' >&2
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exit 1
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}
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if ! grep -Eq -- 'when: disable_swap' "$prereq_tasks"; then
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printf 'swap-disable block is not gated on the disable_swap toggle\n' >&2
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exit 1
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fi
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printf 'Swap disable regression test passed\n'
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