Update jlmkr.sh
This commit is contained in:
Jip-Hop
parent
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commit
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273
jlmkr.sh
273
jlmkr.sh
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@ -31,21 +31,32 @@ Commands:
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start Start jail NAME from the ${JAILS_DIR_PATH} dir
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"
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print() {
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printf '%s\n' "${1-}"
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}
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error() {
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echo -e "${RED}${BOLD}${1}${NORMAL}" >&2
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print "${RED}${BOLD}${1}${NORMAL}" >&2
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}
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fail() {
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error "${1}" && exit 1
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}
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[[ -z "${BASH_VERSINFO+x}" ]] && fail "This script must run in bash..."
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[[ $UID -ne 0 ]] && echo "${USAGE}" && fail "Run this script as root..."
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stat_chmod() {
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# Only run chmod if mode is different from current mode
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if [[ "$(stat -c%a "${2}")" -ne "${1}" ]]; then chmod "${1}" "${2}"; fi
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}
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[[ -z "${BASH_VERSINFO+x}" ]] && fail 'This script must run in bash...'
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[[ $UID -ne 0 ]] && print "${USAGE}" && fail 'Run this script as root...'
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cd "${SCRIPT_DIR_PATH}" || fail "Could not change working directory to ${SCRIPT_DIR_PATH}..."
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# Set appropriate permissions (if not already set) for this file, since it's executed as root
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stat_chmod 700 "${SCRIPT_NAME}"
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trace() {
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# https://unix.stackexchange.com/a/504829/477308
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echo 'Error occurred:'
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print 'Error occurred:'
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awk 'NR>L-4 && NR<L+4 { printf "%-5d%3s%s\n",NR,(NR==L?">>>":""),$0 }' L="${1}" "${ABSOLUTE_SCRIPT_PATH}"
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}
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@ -57,14 +68,14 @@ trap 'trace $LINENO' ERR
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#####################
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start_jail() {
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[[ -z "${1}" ]] && fail "Please specify the name of the jail to start."
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[[ -z "${1}" ]] && fail 'Please specify the name of the jail to start.'
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local jail_name="${1}"
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local jail_path="${JAILS_DIR_PATH}/${jail_name}"
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local jail_config_path="${jail_path}/${JAIL_CONFIG_NAME}"
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! [[ -f "${jail_config_path}" ]] && fail "ERROR: Couldn't find: ${jail_config_path}."
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! [[ -f "${jail_config_path}" ]] && fail "ERROR: Could not find: ${jail_config_path}."
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echo 'Loading config...'
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print 'Loading config...'
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local key value
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@ -82,14 +93,14 @@ start_jail() {
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done <"${jail_config_path}"
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echo 'Config loaded!'
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print 'Config loaded!'
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local systemd_run_additional_args=("--unit=jlmkr-${jail_name}" "--working-directory=./${jail_path}" "--description=My nspawn jail ${jail_name} [created with jailmaker]")
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local systemd_nspawn_additional_args=("--machine=${jail_name}" "--directory=${JAIL_ROOTFS_NAME}")
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if [[ "${docker_compatible}" -eq 1 ]]; then
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# Enable ip forwarding on the host (docker needs it)
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echo 1 >/proc/sys/net/ipv4/ip_forward
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printf 1 >/proc/sys/net/ipv4/ip_forward
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# To properly run docker inside the jail, we need to lift restrictions
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# Without DevicePolicy=auto images with device nodes may not be pulled
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@ -121,7 +132,7 @@ start_jail() {
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# while read -r arg; do
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# # TODO: does --network-macvlan also need this?
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# if [[ "${arg}" == "--network-bridge=*" ]]; then
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# echo "Enable br_netfilter, docker requires it when jail is connected to bridge."
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# print 'Enable br_netfilter, docker requires it when jail is connected to bridge.'
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# # TODO: figure out what the consequence is when not using br_netfilter
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# # Can these warnings in `docker info` be safely ignored?
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# # WARNING: bridge-nf-call-iptables is disabled
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@ -166,51 +177,51 @@ start_jail() {
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# Read each argument from a string with null character as delimiter
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# Append each argument, one at a time, to the array
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while IFS= read -rd '' arg; do args+=("${arg}"); done < <(xargs printf '%s\0' <<<"${systemd_run_default_args}")
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while IFS= read -rd '' arg; do [[ -n "${arg}" ]] && args+=("${arg}"); done < <(printf %s "${systemd_run_default_args}" | xargs printf '%s\0')
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# Append each element in systemd_run_additional_args to the args array
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args+=("${systemd_run_additional_args[@]}")
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# Add two more args to the array
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args+=(-- systemd-nspawn)
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# Append each argument, one at a time, to the array
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while IFS= read -rd '' arg; do args+=("${arg}"); done < <(xargs printf '%s\0' <<<"${systemd_nspawn_default_args}")
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while IFS= read -rd '' arg; do [[ -n "${arg}" ]] && args+=("${arg}"); done < <(printf %s "${systemd_nspawn_default_args}" | xargs printf '%s\0')
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# Append each element in systemd_nspawn_additional_args to the args array
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args+=("${systemd_nspawn_additional_args[@]}")
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# Append each argument, one at a time, to the array
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while IFS= read -rd '' arg; do args+=("${arg}"); done < <(xargs printf '%s\0' <<<"${systemd_nspawn_user_args}")
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while IFS= read -rd '' arg; do [[ -n "${arg}" ]] && args+=("${arg}"); done < <(printf %s "${systemd_nspawn_user_args}" | xargs printf '%s\0')
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# Concat all arguments in the array into a single space separated string,
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# but use %q to output each argument in a format that can be reused as shell input
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# This escapes special characters for us, which were 'lost' when xargs read the input above
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# https://ss64.com/bash/printf.html
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args_string="$(printf '%q ' "${args[@]}")"
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echo
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echo "All the arguments to pass to systemd-run:"
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print
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print 'All the arguments to pass to systemd-run:'
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printf '%s' "${args_string}" | xargs -n 1
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echo
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echo "Starting jail with the following command:"
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echo
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echo "systemd-run ${args_string}"
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echo
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print
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print 'Starting jail with the following command:'
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print
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print "systemd-run ${args_string}"
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print
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printf '%s' "${args_string}" | xargs systemd-run || {
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echo
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print
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error 'Failed to start the jail...'
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fail "Please check and fix the config file with \"nano ${jail_config_path}\"."
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fail 'Please check and fix the config file with "nano '"${jail_config_path}"'".'
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}
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echo
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echo "Check logging:"
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echo "journalctl -u jlmkr-${jail_name}"
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echo
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echo "Check status:"
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echo "systemctl status jlmkr-${jail_name}"
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echo
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echo "Stop the jail:"
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echo "machinectl stop ${jail_name}"
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echo
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echo "Get a shell:"
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echo "machinectl shell ${jail_name}"
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print
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print 'Check logging:'
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print "journalctl -u jlmkr-${jail_name}"
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print
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print 'Check status:'
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print "systemctl status jlmkr-${jail_name}"
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print
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print 'Stop the jail:'
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print "machinectl stop ${jail_name}"
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print
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print 'Get a shell:'
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print "machinectl shell ${jail_name}"
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}
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######################
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@ -220,21 +231,16 @@ start_jail() {
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cleanup() {
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# Remove the jail_path if it's a directory
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local jail_path="${1}"
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[[ -d "${jail_path}" ]] && echo -e "\n\nCleaning up: ${jail_path}\n" && rm -rf "${jail_path}"
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}
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stat_chmod() {
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# Only run chmod if mode is different from current mode
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if [[ "$(stat -c%a "${2}")" -ne "${1}" ]]; then chmod "${1}" "${2}"; fi
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[[ -d "${jail_path}" ]] && print && print "Cleaning up: ${jail_path}" && rm -rf "${jail_path}"
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}
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validate_download_script() {
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echo "6cca2eda73c7358c232fecb4e750b3bf0afa9636efb5de6a9517b7df78be12a4 ${1}" | sha256sum --check >/dev/null
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print "6cca2eda73c7358c232fecb4e750b3bf0afa9636efb5de6a9517b7df78be12a4 ${1}" | sha256sum --check >/dev/null
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}
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create_jail() {
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echo -e "${DISCLAIMER}"
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echo
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print "${DISCLAIMER}"
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print
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local name_from_arg="${1}"
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local arch
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@ -245,7 +251,7 @@ create_jail() {
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[[ "$(basename "${SCRIPT_DIR_PATH}")" != 'jailmaker' ]] && {
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error "${SCRIPT_NAME} needs to create files."
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error "Currently it can't decide if it's safe to create files in:"
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error 'Currently it can not decide if it is safe to create files in:'
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error "${SCRIPT_DIR_PATH}"
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fail "Please create a dedicated directory called 'jailmaker', store ${SCRIPT_NAME} there and try again."
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}
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@ -253,21 +259,18 @@ create_jail() {
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local reply
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if [[ $(findmnt --target . --output TARGET --noheadings --first-only) != /mnt/* ]]; then
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echo "${YELLOW}${BOLD}WARNING: BEWARE OF DATA LOSS${NORMAL}"
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echo
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echo "${SCRIPT_NAME} should be on a dataset mounted under /mnt (it currently isn't)."
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echo "Storing it on the boot-pool means losing all jails when updating TrueNAS."
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echo "If you continue, jails will be stored under:"
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echo "${SCRIPT_DIR_PATH}"
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echo
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read -p "Do you wish to ignore this warning and continue? [y/N] " -n 1 -r reply && echo
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print "${YELLOW}${BOLD}WARNING: BEWARE OF DATA LOSS${NORMAL}"
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print
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print "${SCRIPT_NAME} should be on a dataset mounted under /mnt (it currently isn't)."
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print 'Storing it on the boot-pool means losing all jails when updating TrueNAS.'
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print 'If you continue, jails will be stored under:'
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print "${SCRIPT_DIR_PATH}"
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print
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read -p "Do you wish to ignore this warning and continue? [y/N] " -n 1 -r reply && print
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# Enter accepts default (no)
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! [[ "${reply}" =~ ^[Yy]$ ]] && exit
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fi
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# Set appropriate permissions (if not already set) for this file, since it's executed as root
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stat_chmod 700 "${SCRIPT_NAME}"
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# Create the lxc dirs if nonexistent
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mkdir -p "${lxc_dir_path}"
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stat_chmod 700 "${lxc_dir_path}"
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@ -289,32 +292,32 @@ create_jail() {
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local distro='debian' release='bullseye'
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read -p "Install the recommended distro (Debian 11)? [Y/n] " -n 1 -r reply && echo
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read -p "Install the recommended distro (Debian 11)? [Y/n] " -n 1 -r reply && print
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if ! [[ "${reply}" =~ ^([Yy]|)$ ]]; then
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echo
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echo "${YELLOW}${BOLD}WARNING: ADVANCED USAGE${NORMAL}"
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echo
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echo "You may now choose from a list which distro to install."
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echo "But not all of them will work with ${SCRIPT_NAME} since these images are made for LXC."
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echo "Distros based on systemd probably work (e.g. Ubuntu, Arch Linux and Rocky Linux)."
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echo "Others (Alpine, Devuan, Void Linux) probably won't."
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echo
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read -p "Press any key to continue: " -n 1 -r reply && echo
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echo
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print
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print "${YELLOW}${BOLD}WARNING: ADVANCED USAGE${NORMAL}"
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print
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print 'You may now choose from a list which distro to install.'
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print "But not all of them will work with ${SCRIPT_NAME} since these images are made for LXC."
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print 'Distros based on systemd probably work (e.g. Ubuntu, Arch Linux and Rocky Linux).'
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print 'Others (Alpine, Devuan, Void Linux) probably will not.'
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print
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read -p "Press any key to continue: " -n 1 -r reply && print
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print
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lxc_cache_path=${lxc_cache_path} "${lxc_download_script_path}" --list --arch="${arch}" || :
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echo
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echo "Choose from the DIST column."
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echo
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read -e -r -p "Distribution: " distro && echo
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echo "Choose from the RELEASE column (or ARCH if RELEASE is empty)."
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echo
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print
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print 'Choose from the DIST column.'
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print
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read -e -r -p "Distribution: " distro && print
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print 'Choose from the RELEASE column (or ARCH if RELEASE is empty).'
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print
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read -e -r -p "Release: " release
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fi
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echo
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print
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local jail_name jail_path
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while true; do
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read -e -r -p "Enter jail name: " -i "${name_from_arg}" jail_name && echo
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read -e -r -p "Enter jail name: " -i "${name_from_arg}" jail_name && print
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if ! [[ "${jail_name}" =~ ^[.a-zA-Z0-9-]{1,64}$ && "${jail_name}" != '.'* && "${jail_name}" != *'.' && "${jail_name}" != *'..'* ]]; then
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cat <<-EOF
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${YELLOW}${BOLD}WARNING: INVALID NAME${NORMAL}
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@ -330,8 +333,8 @@ create_jail() {
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jail_path="${JAILS_DIR_PATH}/${jail_name}"
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if [[ -e "${jail_path}" ]]; then
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echo "A jail with this name already exists."
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echo
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print 'A jail with this name already exists.'
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print
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else
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# Accept the name
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break
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@ -345,33 +348,33 @@ create_jail() {
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local docker_compatible gpu_passthrough systemd_nspawn_user_args
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echo "Docker won't be installed by ${SCRIPT_NAME}."
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echo "But it can setup the jail with the capabilities required to run docker."
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echo "You can turn DOCKER_COMPATIBLE mode on/off post-install."
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echo
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read -p "Make jail docker compatible right now? [y/N] " -n 1 -r reply && echo
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print "Docker won't be installed by ${SCRIPT_NAME}."
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print 'But it can setup the jail with the capabilities required to run docker.'
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print 'You can turn DOCKER_COMPATIBLE mode on/off post-install.'
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print
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read -p "Make jail docker compatible right now? [y/N] " -n 1 -r reply && print
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# Enter accepts default (no)
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if ! [[ "${reply}" =~ ^[Yy]$ ]]; then docker_compatible=0; else docker_compatible=1; fi
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echo
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read -p "Give access to the GPU inside the jail? [y/N] " -n 1 -r reply && echo
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print
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read -p "Give access to the GPU inside the jail? [y/N] " -n 1 -r reply && print
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# Enter accepts default (no)
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if ! [[ "${reply}" =~ ^[Yy]$ ]]; then gpu_passthrough=0; else gpu_passthrough=1; fi
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echo
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echo "${YELLOW}${BOLD}WARNING: CHECK SYNTAX${NORMAL}"
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echo
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echo "You may pass additional flags to systemd-nspawn."
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echo "With incorrect flags the jail may not start."
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echo "It's possible to correct/add/remove flags post-install."
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echo
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read -p "Show the man page for systemd-nspawn? [y/N] " -n 1 -r reply && echo
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print
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print "${YELLOW}${BOLD}WARNING: CHECK SYNTAX${NORMAL}"
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print
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print 'You may pass additional flags to systemd-nspawn.'
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print 'With incorrect flags the jail may not start.'
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print 'It is possible to correct/add/remove flags post-install.'
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print
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read -p "Show the man page for systemd-nspawn? [y/N] " -n 1 -r reply && print
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# Enter accepts default (no)
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if [[ "${reply}" =~ ^[Yy]$ ]]; then
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man systemd-nspawn
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else
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echo
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echo "You may read the systemd-nspawn manual online:"
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echo "https://manpages.debian.org/${distro}/systemd-container/systemd-nspawn.1.en.html"
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print
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print 'You may read the systemd-nspawn manual online:'
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print "https://manpages.debian.org/${distro}/systemd-container/systemd-nspawn.1.en.html"
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fi
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# Backslashes and colons need to be escaped in bind mount options:
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@ -380,11 +383,11 @@ create_jail() {
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# the corresponding command would be:
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# --bind-ro='/mnt/data/weird chars \:?\\"'
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echo
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echo "For example to mount directories inside the jail you may add:"
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echo "--bind=/mnt/a/readwrite/directory --bind-ro=/mnt/a/readonly/directory"
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echo
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read -e -r -p "Additional flags: " systemd_nspawn_user_args && echo
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print
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print 'For example to mount directories inside the jail you may add:'
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print '--bind=/mnt/a/readwrite/directory --bind-ro=/mnt/a/readonly/directory'
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print
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read -e -r -p "Additional flags: " systemd_nspawn_user_args && print
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# Create directory for rootfs
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JAIL_ROOTFS_PATH="${jail_path}/${JAIL_ROOTFS_NAME}"
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@ -398,8 +401,8 @@ create_jail() {
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LXC_CACHE_PATH=${lxc_cache_path} "${lxc_download_script_path}" \
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--name="${jail_name}" --path="${jail_path}" --rootfs="${JAIL_ROOTFS_PATH}" \
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--arch="${arch}" --dist="${distro}" --release="${release}" ||
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fail "Aborted creating rootfs..."
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echo
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fail 'Aborted creating rootfs...'
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print
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# Assuming the name of your jail is "myjail"
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# and "machinectl shell myjail" doesn't work
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@ -425,27 +428,27 @@ create_jail() {
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# They don't shutdown cleanly via systemctl and machinectl...
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if [[ "$(basename "$(readlink -f "${JAIL_ROOTFS_PATH}/sbin/init")")" != systemd ]]; then
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echo "${YELLOW}${BOLD}WARNING: DISTRO NOT SUPPORTED${NORMAL}"
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echo
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echo "Chosen distro appears not to use systemd..."
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echo
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echo "You probably won't get a shell with:"
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echo "machinectl shell ${jail_name}"
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echo
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echo "You may get a shell with this command:"
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print "${YELLOW}${BOLD}WARNING: DISTRO NOT SUPPORTED${NORMAL}"
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print
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print 'Chosen distro appears not to use systemd...'
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print
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print 'You probably will not get a shell with:'
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print "machinectl shell ${jail_name}"
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print
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print 'You may get a shell with this command:'
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# About nsenter:
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# shellcheck disable=SC2016
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echo 'nsenter -t $(machinectl show '"${jail_name}"' -p Leader --value) -a /bin/sh -l'
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echo
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echo 'Read about the downsides of nsenter:'
|
||||
echo 'https://github.com/systemd/systemd/issues/12785#issuecomment-503019081'
|
||||
echo
|
||||
echo "${BOLD}Using this distro with ${SCRIPT_NAME} is NOT recommended.${NORMAL}"
|
||||
echo
|
||||
read -p "Abort creating jail? [Y/n] " -n 1 -r reply && echo
|
||||
print 'nsenter -t $(machinectl show '"${jail_name}"' -p Leader --value) -a /bin/sh -l'
|
||||
print
|
||||
print 'Read about the downsides of nsenter:'
|
||||
print 'https://github.com/systemd/systemd/issues/12785#issuecomment-503019081'
|
||||
print
|
||||
print "${BOLD}Using this distro with ${SCRIPT_NAME} is NOT recommended.${NORMAL}"
|
||||
print
|
||||
read -p "Abort creating jail? [Y/n] " -n 1 -r reply && print
|
||||
# Enter accepts default (yes)
|
||||
[[ "${reply}" =~ ^([Yy]|)$ ]] && exit
|
||||
echo
|
||||
print
|
||||
fi
|
||||
|
||||
# Config which systemd handles for us
|
||||
|
|
@ -510,28 +513,28 @@ create_jail() {
|
|||
local systemd_nspawn_default_args=(--keep-unit --quiet --boot)
|
||||
|
||||
{
|
||||
echo "DOCKER_COMPATIBLE=${docker_compatible}"
|
||||
echo "GPU_PASSTHROUGH=${gpu_passthrough}"
|
||||
echo "SYSTEMD_NSPAWN_USER_ARGS=${systemd_nspawn_user_args}"
|
||||
echo
|
||||
echo "# You generally won't need to change the options below"
|
||||
echo "SYSTEMD_RUN_DEFAULT_ARGS=${systemd_run_default_args[*]}"
|
||||
echo "SYSTEMD_NSPAWN_DEFAULT_ARGS=${systemd_nspawn_default_args[*]}"
|
||||
print "DOCKER_COMPATIBLE=${docker_compatible}"
|
||||
print "GPU_PASSTHROUGH=${gpu_passthrough}"
|
||||
print "SYSTEMD_NSPAWN_USER_ARGS=${systemd_nspawn_user_args}"
|
||||
print
|
||||
print '# You generally will not need to change the options below'
|
||||
print "SYSTEMD_RUN_DEFAULT_ARGS=${systemd_run_default_args[*]}"
|
||||
print "SYSTEMD_NSPAWN_DEFAULT_ARGS=${systemd_nspawn_default_args[*]}"
|
||||
} >"${jail_config_path}"
|
||||
|
||||
chmod 600 "${jail_config_path}"
|
||||
|
||||
# Remove the cleanup trap on exit
|
||||
trap - EXIT
|
||||
echo "Done creating the jail."
|
||||
echo
|
||||
read -p "Start the jail now? [Y/n] " -n 1 -r reply && echo
|
||||
print 'Done creating the jail.'
|
||||
print
|
||||
read -p "Start the jail now? [Y/n] " -n 1 -r reply && print
|
||||
# Enter accepts default (yes)
|
||||
if [[ "${reply}" =~ ^([Yy]|)$ ]]; then
|
||||
start_jail "${jail_name}"
|
||||
else
|
||||
echo
|
||||
echo 'Skipped starting jail.'
|
||||
print
|
||||
print 'Skipped starting jail.'
|
||||
fi
|
||||
}
|
||||
|
||||
|
|
@ -542,15 +545,15 @@ create_jail() {
|
|||
case "${1-""}" in
|
||||
|
||||
'')
|
||||
read -p "Create a new jail? [Y/n] " -n 1 -r reply && echo
|
||||
echo
|
||||
read -p "Create a new jail? [Y/n] " -n 1 -r reply && print
|
||||
print
|
||||
# Enter accepts default (yes)
|
||||
# https://stackoverflow.com/a/1885534
|
||||
if [[ "${reply}" =~ ^([Yy]|)$ ]]; then
|
||||
create_jail ""
|
||||
else
|
||||
|
||||
echo "${USAGE}"
|
||||
print "${USAGE}"
|
||||
fi
|
||||
;;
|
||||
|
||||
|
|
@ -563,6 +566,6 @@ start)
|
|||
;;
|
||||
|
||||
*)
|
||||
echo "${USAGE}"
|
||||
print "${USAGE}"
|
||||
;;
|
||||
esac
|
||||
|
|
|
|||
Loading…
Reference in New Issue