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Problem: It is cumbersome to manage BigchainDB and Tendermint process…
…es (#2410). * Introduce a Monit-based setup for managing processes. Add the corresponding section to the network setup guide.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,173 @@ | ||
| #!/bin/bash | ||
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| set -o nounset | ||
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| # Check if directory for monit logs exists | ||
| if [ ! -d "$HOME/.bigchaindb-monit" ]; then | ||
| mkdir -p "$HOME/.bigchaindb-monit" | ||
| fi | ||
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| monit_pid_path=${MONIT_PID_PATH:=$HOME/.bigchaindb-monit/monit_processes} | ||
| monit_script_path=${MONIT_SCRIPT_PATH:=$HOME/.bigchaindb-monit/monit_script} | ||
| monit_log_path=${MONIT_LOG_PATH:=$HOME/.bigchaindb-monit/logs} | ||
| monitrc_path=${MONITRC_PATH:=$HOME/.monitrc} | ||
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| function usage() { | ||
| cat <<EOM | ||
| Usage: ${0##*/} [-h] | ||
| Configure Monit for BigchainDB and Tendermint process management. | ||
| ENV[MONIT_PID_PATH] || --monit-pid-path PATH | ||
| Absolute path to directory where the the program's pid-file will reside. | ||
| The pid-file contains the ID(s) of the process(es). (default: ${monit_pid_path}) | ||
| ENV[MONIT_SCRIPT_PATH] || --monit-script-path PATH | ||
| Absolute path to the directory where the executable program or | ||
| script is present. (default: ${monit_script_path}) | ||
| ENV[MONIT_LOG_PATH] || --monit-log-path PATH | ||
| Absolute path to the directory where all the logs for processes | ||
| monitored by Monit are stored. (default: ${monit_log_path}) | ||
| ENV[MONITRC_PATH] || --monitrc-path PATH | ||
| Absolute path to the monit control file(monitrc). (default: ${monitrc_path}) | ||
| -h|--help | ||
| Show this help and exit. | ||
| EOM | ||
| } | ||
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| while [[ $# -gt 0 ]]; do | ||
| arg="$1" | ||
| case $arg in | ||
| --monit-pid-path) | ||
| monit_pid_path="$2" | ||
| shift | ||
| ;; | ||
| --monit-script-path) | ||
| monit_script_path="$2" | ||
| shift | ||
| ;; | ||
| --monit-log-path) | ||
| monit_log_path="$2" | ||
| shift | ||
| ;; | ||
| --monitrc-path) | ||
| monitrc_path="$2" | ||
| shift | ||
| ;; | ||
| -h|--help) | ||
| usage | ||
| exit | ||
| ;; | ||
| *) | ||
| echo "Unknown option: $1" | ||
| usage | ||
| exit 1 | ||
| ;; | ||
| esac | ||
| shift | ||
| done | ||
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| # Check if directory for monit logs exists | ||
| if [ ! -d "$monit_log_path" ]; then | ||
| mkdir -p "$monit_log_path" | ||
| fi | ||
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| # Check if directory for monit pid files exists | ||
| if [ ! -d "$monit_pid_path" ]; then | ||
| mkdir -p "$monit_pid_path" | ||
| fi | ||
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| cat >${monit_script_path} <<EOF | ||
| #!/bin/bash | ||
| case \$1 in | ||
| start_bigchaindb) | ||
| pushd \$4 | ||
| nohup bigchaindb start >> \$3/bigchaindb.out.log 2>> \$3/bigchaindb.err.log & | ||
| echo \$! > \$2 | ||
| popd | ||
| ;; | ||
| stop_bigchaindb) | ||
| kill -2 \`cat \$2\` | ||
| rm -f \$2 | ||
| ;; | ||
| start_tendermint) | ||
| pushd \$4 | ||
| nohup tendermint node --consensus.create_empty_blocks=false >> \$3/tendermint.out.log 2>> \$3/tendermint.err.log & | ||
| echo \$! > \$2 | ||
| popd | ||
| ;; | ||
| stop_tendermint) | ||
| kill -2 \`cat \$2\` | ||
| rm -f \$2 | ||
| ;; | ||
| esac | ||
| exit 0 | ||
| EOF | ||
| chmod +x ${monit_script_path} | ||
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| # Handling overwriting of control file interactively | ||
| if [ -f "$monitrc_path" ]; then | ||
| echo "$monitrc_path already exists." | ||
| read -p "Overwrite[Y]? " -n 1 -r | ||
| echo | ||
| if [[ $REPLY =~ ^[Yy]$ ]]; then | ||
| echo "Overriding $monitrc_path/.monitrc" | ||
| else | ||
| read -p "Enter absolute path to store Monit control file: " monitrc_path | ||
| eval monitrc_path="$monitrc_path" | ||
| if [ ! -d "$(dirname $monitrc_path)" ]; then | ||
| echo "Failed to save monit control file '$monitrc_path': No such file or directory." | ||
| exit 1 | ||
| fi | ||
| fi | ||
| fi | ||
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| # configure monitrc | ||
| cat >${monitrc_path} <<EOF | ||
| set httpd | ||
| port 2812 | ||
| allow localhost | ||
| check process bigchaindb | ||
| with pidfile ${monit_pid_path}/bigchaindb.pid | ||
| start program "${monit_script_path} start_bigchaindb $monit_pid_path/bigchaindb.pid ${monit_log_path} ${monit_log_path}" | ||
| restart program "${monit_script_path} start_bigchaindb $monit_pid_path/bigchaindb.pid ${monit_log_path} ${monit_log_path}" | ||
| stop program "${monit_script_path} stop_bigchaindb $monit_pid_path/bigchaindb.pid ${monit_log_path} ${monit_log_path}" | ||
| check process tendermint | ||
| with pidfile ${monit_pid_path}/tendermint.pid | ||
| start program "${monit_script_path} start_tendermint ${monit_pid_path}/tendermint.pid ${monit_log_path} ${monit_log_path}" | ||
| restart program "${monit_script_path} start_bigchaindb ${monit_pid_path}/bigchaindb.pid ${monit_log_path} ${monit_log_path}" | ||
| stop program "${monit_script_path} stop_tendermint ${monit_pid_path}/tendermint.pid ${monit_log_path} ${monit_log_path}" | ||
| depends on bigchaindb | ||
| EOF | ||
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| # Setting permissions for control file | ||
| chmod 0700 ${monitrc_path} | ||
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| echo -e "BigchainDB process manager configured!" | ||
| set -o errexit |
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