mirror of
https://github.com/kevinveenbirkenbach/computer-playbook.git
synced 2026-11-08 03:38:23 +00:00
112 lines
3.2 KiB
Bash
Executable File
112 lines
3.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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STATE_FILE="/tmp/infinito-dev-environment-ipv6.state"
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if [[ "${EUID:-$(id -u)}" -ne 0 ]]; then
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echo "[ipv6] error: disable.sh must be run as root (for example via 'sudo' or 'make disable-ipv6')" >&2
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exit 1
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fi
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write_state_file() {
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local current_all="$1"
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local current_default="$2"
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local path
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local iface
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local value
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{
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printf 'ALL_DISABLE_IPV6=%q\n' "${current_all}"
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printf 'DEFAULT_DISABLE_IPV6=%q\n' "${current_default}"
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printf 'declare -A IFACE_DISABLE_IPV6=(\n'
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for path in /proc/sys/net/ipv6/conf/*/disable_ipv6; do
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[[ -e "${path}" ]] || continue
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iface="${path%/disable_ipv6}"
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iface="${iface##*/}"
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value="$(<"${path}")"
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printf ' [%q]=%q\n' "${iface}" "${value}"
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done
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printf ')\n'
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} >"${STATE_FILE}"
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}
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disable_existing_interfaces() {
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local path
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local iface
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for path in /proc/sys/net/ipv6/conf/*/disable_ipv6; do
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[[ -e "${path}" ]] || continue
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iface="${path%/disable_ipv6}"
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iface="${iface##*/}"
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[[ "${iface}" == "all" || "${iface}" == "default" ]] && continue
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if ! sysctl -w "net.ipv6.conf.${iface}.disable_ipv6=1" >/dev/null 2>&1; then
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echo "[ipv6] warning: cannot update net.ipv6.conf.${iface}.disable_ipv6"
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fi
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done
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}
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restart_docker_service() {
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if ! command -v systemctl >/dev/null 2>&1; then
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echo "[ipv6] warning: systemctl is unavailable; skipping docker.service restart"
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return 0
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fi
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if ! systemctl list-unit-files docker.service >/dev/null 2>&1; then
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echo "[ipv6] warning: docker.service is unavailable; skipping docker.service restart"
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return 0
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fi
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echo "[ipv6] restarting docker.service"
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if ! systemctl restart docker.service >/dev/null 2>&1; then
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echo "[ipv6] warning: failed to restart docker.service"
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return 0
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fi
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echo "[ipv6] restarted docker.service"
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}
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if ! command -v sysctl >/dev/null 2>&1; then
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echo "[ipv6] skipping disable: sysctl is unavailable in this environment"
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exit 0
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fi
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if ! current_all="$(sysctl -n net.ipv6.conf.all.disable_ipv6 2>/dev/null)"; then
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echo "[ipv6] skipping disable: kernel does not expose net.ipv6.conf.all.disable_ipv6"
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exit 0
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fi
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if ! current_default="$(sysctl -n net.ipv6.conf.default.disable_ipv6 2>/dev/null)"; then
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echo "[ipv6] skipping disable: kernel does not expose net.ipv6.conf.default.disable_ipv6"
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exit 0
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fi
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echo "[ipv6] current: all=${current_all} default=${current_default}"
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if [[ ! -f "${STATE_FILE}" ]]; then
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write_state_file "${current_all}" "${current_default}"
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else
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echo "[ipv6] existing state file found at ${STATE_FILE}; keeping original restore values"
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fi
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if ! sysctl -w net.ipv6.conf.all.disable_ipv6=1 >/dev/null; then
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rm -f "${STATE_FILE}"
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echo "[ipv6] skipping disable: cannot update net.ipv6.conf.all.disable_ipv6"
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exit 0
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fi
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if ! sysctl -w net.ipv6.conf.default.disable_ipv6=1 >/dev/null; then
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if ! sysctl -w "net.ipv6.conf.all.disable_ipv6=${current_all}" >/dev/null 2>&1; then
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echo "[ipv6] warning: failed to restore net.ipv6.conf.all.disable_ipv6"
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fi
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rm -f "${STATE_FILE}"
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echo "[ipv6] skipping disable: cannot update net.ipv6.conf.default.disable_ipv6"
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exit 0
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fi
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disable_existing_interfaces
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restart_docker_service
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echo "[ipv6] disabled for all, default, and currently existing interfaces"
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echo "[ipv6] note: make disable-ipv6 calls make refresh after the docker.service restart"
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