67cca5d3a1
Surprisingly enough, by doing small cirurgical changes in the existing EMQX control scripts, we are able to get it running with Elixir and with existing functionalities (`console`, `remote_console`, `start`, `stop`, `ctl`, `foreground`, `eval`).
247 lines
7.9 KiB
Bash
247 lines
7.9 KiB
Bash
#!/bin/bash
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# Echo to stderr on errors
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echoerr() { echo "ERROR: $*" 1>&2; }
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die() {
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echoerr "ERROR: $1"
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errno=${2:-1}
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exit "$errno"
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}
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assert_node_alive() {
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if ! relx_nodetool "ping" > /dev/null; then
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die "node_is_not_running!" 1
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fi
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}
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check_erlang_start() {
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"$BINDIR/$PROGNAME" \
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-noshell \
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-boot_var RELEASE_LIB "$ERTS_LIB_DIR/lib" \
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-boot "$REL_DIR/start_clean" \
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-s crypto start \
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-s erlang halt
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}
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# Simple way to check the correct user and fail early
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check_user() {
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# Validate that the user running the script is the owner of the
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# RUN_DIR.
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if [ "$RUNNER_USER" ] && [ "x$WHOAMI" != "x$RUNNER_USER" ]; then
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if [ "x$WHOAMI" != "xroot" ]; then
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echo "You need to be root or use sudo to run this command"
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exit 1
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fi
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CMD="DEBUG=$DEBUG \"$RUNNER_SCRIPT\" "
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for ARG in "$@"; do
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CMD="${CMD} \"$ARG\""
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done
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# This will drop priviledges into the runner user
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# It exec's in a new shell and the current shell will exit
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exec su - "$RUNNER_USER" -c "$CMD"
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fi
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}
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# Get node pid
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relx_get_pid() {
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if output="$(relx_nodetool rpcterms os getpid)"
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then
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# shellcheck disable=SC2001 # Escaped quote taken as closing quote in editor
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echo "$output" | sed -e 's/"//g'
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return 0
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else
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echo "$output"
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return 1
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fi
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}
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# Connect to a remote node
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relx_rem_sh() {
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# Generate a unique id used to allow multiple remsh to the same node
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# transparently
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id="remsh$(relx_gen_id)-${NAME}"
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# Get the node's ticktime so that we use the same thing.
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TICKTIME="$(relx_nodetool rpcterms net_kernel get_net_ticktime)"
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# shellcheck disable=SC2086 # $EPMD_ARG is supposed to be split by whitespace
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# shellcheck disable=SC2153 # $NAME_TYPE is defined by `common_defs2.sh`, which runs before this is called
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# Setup remote shell command to control node
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if [ "$IS_ELIXIR" = "yes" ]
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then
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exec "$REL_DIR/iex" \
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--remsh "$NAME" \
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--boot-var RELEASE_LIB "$ERTS_LIB_DIR" \
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--cookie "$COOKIE" \
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--hidden \
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--erl "-kernel net_ticktime $TICKTIME" \
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--erl "$EPMD_ARG" \
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--erl "$NAME_TYPE $id" \
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--boot "$REL_DIR/start_clean"
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else
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exec "$BINDIR/erl" "$NAME_TYPE" "$id" \
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-remsh "$NAME" -boot "$REL_DIR/start_clean" \
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-boot_var ERTS_LIB_DIR "$ERTS_LIB_DIR" \
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-setcookie "$COOKIE" -hidden -kernel net_ticktime "$TICKTIME" \
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$EPMD_ARG
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fi
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}
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# Generate a random id
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relx_gen_id() {
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od -t x -N 4 /dev/urandom | head -n1 | awk '{print $2}'
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}
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# Control a node
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relx_nodetool() {
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command="$1"; shift
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ERL_FLAGS="${ERL_FLAGS:-} $EPMD_ARG" \
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"$ERTS_DIR/bin/escript" "$ROOTDIR/bin/nodetool" "$NAME_TYPE" "$NAME" \
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-setcookie "$COOKIE" "$command" "$@"
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}
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call_hocon() {
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"$ERTS_DIR/bin/escript" "$ROOTDIR/bin/nodetool" hocon "$@" \
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|| die "call_hocon_failed: $*" $?
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}
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# Run an escript in the node's environment
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relx_escript() {
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shift; scriptpath="$1"; shift
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"$ERTS_DIR/bin/escript" "$ROOTDIR/$scriptpath" "$@"
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}
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# Output a start command for the last argument of run_erl.
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# The calling script defines `$START_OPTION`, when the command is to
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# start EMQX in the background.
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relx_start_command() {
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printf "exec \"%s\" \"%s\"" "$RUNNER_SCRIPT" \
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"$START_OPTION"
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}
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# Function to generate app.config and vm.args
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generate_config() {
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local name_type="$1"
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local node_name="$2"
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## Delete the *.siz files first or it cann't start after
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## changing the config 'log.rotation.size'
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rm -rf "${RUNNER_LOG_DIR}"/*.siz
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EMQX_LICENSE_CONF_OPTION=""
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if [ "${EMQX_LICENSE_CONF:-}" != "" ]; then
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EMQX_LICENSE_CONF_OPTION="-c ${EMQX_LICENSE_CONF}"
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fi
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## timestamp for each generation
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local NOW_TIME
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NOW_TIME="$(call_hocon now_time)"
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## ths command populates two files: app.<time>.config and vm.<time>.args
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## NOTE: the generate command merges environment variables to the base config (emqx.conf),
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## but does not include the cluster-override.conf and local-override.conf
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## meaning, certain overrides will not be mapped to app.<time>.config file
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## disable SC2086 to allow EMQX_LICENSE_CONF_OPTION to split
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# shellcheck disable=SC2086
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call_hocon -v -t "$NOW_TIME" -I "$CONFIGS_DIR/" -s $SCHEMA_MOD -c "$RUNNER_ETC_DIR"/emqx.conf $EMQX_LICENSE_CONF_OPTION -d "$RUNNER_DATA_DIR"/configs generate
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## filenames are per-hocon convention
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local CONF_FILE="$CONFIGS_DIR/app.$NOW_TIME.config"
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local HOCON_GEN_ARG_FILE="$CONFIGS_DIR/vm.$NOW_TIME.args"
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# This is needed by the Elixir scripts.
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# Do NOT append `.config`.
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RELEASE_SYS_CONFIG="$CONFIGS_DIR/app.$NOW_TIME"
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export RELEASE_SYS_CONFIG
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CONFIG_ARGS="-config $CONF_FILE -args_file $HOCON_GEN_ARG_FILE"
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## Merge hocon generated *.args into the vm.args
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TMP_ARG_FILE="$CONFIGS_DIR/vm.args.tmp"
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cp "$RUNNER_ETC_DIR/vm.args" "$TMP_ARG_FILE"
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echo "" >> "$TMP_ARG_FILE"
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echo "-pa ${REL_DIR}/consolidated" >> "$TMP_ARG_FILE"
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## read lines from generated vm.<time>.args file
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## drop comment lines, and empty lines using sed
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## pipe the lines to a while loop
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sed '/^#/d' "$HOCON_GEN_ARG_FILE" | sed '/^$/d' | while IFS='' read -r ARG_LINE || [ -n "$ARG_LINE" ]; do
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## in the loop, split the 'key[:space:]value' pair
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ARG_KEY=$(echo "$ARG_LINE" | awk '{$NF="";print}')
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ARG_VALUE=$(echo "$ARG_LINE" | awk '{print $NF}')
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## use the key to look up in vm.args file for the value
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TMP_ARG_VALUE=$(grep "^$ARG_KEY" "$TMP_ARG_FILE" || true | awk '{print $NF}')
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## compare generated (to override) value to original (to be overriden) value
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if [ "$ARG_VALUE" != "$TMP_ARG_VALUE" ] ; then
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## if they are different
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if [ -n "$TMP_ARG_VALUE" ]; then
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## if the old value is present, replace it with generated value
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sh -c "$SED_REPLACE 's|^$ARG_KEY.*$|$ARG_LINE|' $TMP_ARG_FILE"
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else
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## otherwise append generated value to the end
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echo "$ARG_LINE" >> "$TMP_ARG_FILE"
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fi
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fi
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done
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echo "$name_type $node_name" >> "$TMP_ARG_FILE"
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## rename the generated vm.<time>.args file
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mv -f "$TMP_ARG_FILE" "$HOCON_GEN_ARG_FILE"
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# shellcheck disable=SC2086
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if ! relx_nodetool chkconfig $CONFIG_ARGS; then
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die "failed_to_check_config $CONFIG_ARGS"
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fi
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}
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# check if a PID is down
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is_down() {
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PID="$1"
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if ps -p "$PID" >/dev/null; then
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# still around
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# shellcheck disable=SC2009 # this grep pattern is not a part of the progra names
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if ps -p "$PID" | grep -q 'defunct'; then
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# zombie state, print parent pid
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parent="$(ps -o ppid= -p "$PID" | tr -d ' ')"
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echo "WARN: $PID is marked <defunct>, parent:"
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ps -p "$parent"
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return 0
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fi
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return 1
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fi
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# it's gone
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return 0
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}
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wait_for() {
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local WAIT_TIME
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local CMD
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WAIT_TIME="$1"
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shift
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CMD="$*"
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while true; do
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if $CMD >/dev/null 2>&1; then
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return 0
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fi
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if [ "$WAIT_TIME" -le 0 ]; then
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return 1
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fi
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WAIT_TIME=$((WAIT_TIME - 1))
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sleep 1
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done
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}
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latest_vm_args() {
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local hint_var_name="$1"
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local vm_args_file
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vm_args_file="$(find "$CONFIGS_DIR" -type f -name "vm.*.args" | sort | tail -1)"
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if [ -f "$vm_args_file" ]; then
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echo "$vm_args_file"
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else
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echoerr "node not initialized?"
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# shellcheck disable=SC2153 # $COMMAND is defined by the calling script
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echoerr "Generated config file vm.*.args is not found for command '$COMMAND'"
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echoerr "in config dir: $CONFIGS_DIR"
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echoerr "In case the file has been deleted while the node is running,"
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echoerr "set environment variable '$hint_var_name' to continue"
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exit 1
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fi
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}
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