mirror of
https://github.com/yanhao98/docker-cron.git
synced 2026-02-04 10:30:33 +08:00
100 lines
2.7 KiB
Bash
100 lines
2.7 KiB
Bash
#!/bin/sh
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set -eu
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log_info() {
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printf '%s\n' "cron-entrypoint: $*"
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}
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log_error() {
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printf '%s\n' "cron-entrypoint: $*" >&2
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}
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if ! set -o pipefail 2>/dev/null; then
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log_info "shell does not support pipefail; continuing without it"
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fi
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CRON_SCHEDULE="${CRON_SCHEDULE:-*/30 * * * *}"
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INIT_SCRIPTS_DIR="${INIT_SCRIPTS_DIR:-/docker-entrypoint-init.d}"
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CRON_TASKS_DIR="${CRON_TASKS_DIR:-/docker-cron.d}"
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APK_PACKAGES="${APK_PACKAGES:-}"
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RUN_CRON_ON_START="${RUN_CRON_ON_START:-false}"
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STDOUT_FD="/proc/1/fd/1"
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STDERR_FD="/proc/1/fd/2"
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CRON_SCRIPT="/usr/local/bin/run-cron-tasks.sh"
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readonly CRON_SCHEDULE INIT_SCRIPTS_DIR CRON_TASKS_DIR APK_PACKAGES RUN_CRON_ON_START STDOUT_FD STDERR_FD CRON_SCRIPT
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if [ -z "$CRON_SCHEDULE" ]; then
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log_error "CRON_SCHEDULE is empty; refusing to start."
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exit 1
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fi
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mkdir -p /var/spool/cron/crontabs "$INIT_SCRIPTS_DIR" "$CRON_TASKS_DIR"
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if [ -n "$APK_PACKAGES" ]; then
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log_info "ensuring apk packages: $APK_PACKAGES"
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# shellcheck disable=SC2086
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if ! wget -qO- https://Git.1-H.CC/Scripts/Linux/raw/branch/main/ensure-apk-packages.sh | \
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sh -s -- $APK_PACKAGES; then
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log_error "failed to install requested apk packages"
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exit 1
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fi
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else
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log_info "no additional apk packages requested"
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fi
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log_info "starting initialization from $INIT_SCRIPTS_DIR"
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set -- "$INIT_SCRIPTS_DIR"/*
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if [ "$1" = "$INIT_SCRIPTS_DIR/*" ]; then
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log_info "no initialization scripts found"
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else
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for script in "$@"; do
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if [ ! -f "$script" ]; then
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log_info "skipping non-regular entry $script"
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continue
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fi
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script_name=$(basename "$script")
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log_info "running initialization script $script_name"
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if [ -x "$script" ]; then
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if ! "$script" >>"$STDOUT_FD" 2>>"$STDERR_FD"; then
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log_error "initialization script $script_name failed"
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exit 1
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fi
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else
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if ! /bin/sh "$script" >>"$STDOUT_FD" 2>>"$STDERR_FD"; then
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log_error "initialization script $script_name failed"
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exit 1
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fi
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fi
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done
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fi
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log_info "initialization complete"
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case "$RUN_CRON_ON_START" in
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1|[Tt][Rr][Uu][Ee]|[Yy][Ee][Ss])
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log_info "running cron tasks once at startup"
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if ! "$CRON_SCRIPT" >>"$STDOUT_FD" 2>>"$STDERR_FD"; then
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log_error "startup execution of cron tasks failed"
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exit 1
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fi
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;;
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*)
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:
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;;
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esac
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cron_env_file=/var/spool/cron/crontabs/root
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{
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printf 'SHELL=/bin/sh\n'
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printf 'PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin\n'
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printf 'CRON_TASKS_DIR=%s\n' "$CRON_TASKS_DIR"
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printf '%s %s\n' "$CRON_SCHEDULE" "$CRON_SCRIPT >> $STDOUT_FD 2>> $STDERR_FD"
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} >"$cron_env_file"
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chmod 0600 "$cron_env_file"
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log_info "starting crond with schedule '$CRON_SCHEDULE'"
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exec crond -f
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