Dolphie

An intuitive feature-rich terminal tool for monitoring MySQL in real-time

Installation

Requires Python 3.8+

Using PyPi

$ pip install dolphie

Using Poetry

$ curl -sSL https://install.python-poetry.org | python3 -

$ poetry install

Using Homebrew

If you are a Homebrew user, you can install dolphie via

$ brew install dolphie

Using Docker

$ docker pull ghcr.io/charles-001/dolphie:latest
$ docker run -dit --name dolphie ghcr.io/charles-001/dolphie:latest
$ docker exec -it dolphie dolphie -h host.docker.internal -u root --ask-pass

Usage

positional arguments:
  uri                   Use a URI string for credentials - format: mysql://user:password@host:port (port is optional with default 3306)

options:
  --help                show this help message and exit
  -u USER, --user USER  Username for MySQL
  -p PASSWORD, --password PASSWORD
                        Password for MySQL
  --ask-pass            Ask for password (hidden text)
  -h HOST, --host HOST  Hostname/IP address for MySQL
  -P PORT, --port PORT  Port for MySQL (Socket has precendence)
  -S SOCKET, --socket SOCKET
                        Socket file for MySQL
  -c CONFIG_FILE, --config-file CONFIG_FILE
                        Config file path to use. This should use [client] section. See below for options support [default: ~/.my.cnf]
  -f HOST_CACHE_FILE, --host-cache-file HOST_CACHE_FILE
                        Resolve IPs to hostnames when your DNS is unable to. Each IP/hostname pair should be on its own line using format: ip=hostname [default: ~/dolphie_host_cache]
  -q QUICK_SWITCH_HOSTS_FILE, --quick-switch-hosts-file QUICK_SWITCH_HOSTS_FILE
                        Specify where the file is that stores the hosts you connect to for quick switching [default: ~/dolphie_quick_switch_hosts]
  -l LOGIN_PATH, --login-path LOGIN_PATH
                        Specify login path to use mysql_config_editor's file ~/.mylogin.cnf for encrypted login credentials. Supercedes config file [default: client]
  -r REFRESH_INTERVAL, --refresh_interval REFRESH_INTERVAL
                        How much time to wait in seconds between each refresh [default: 1]
  -H HEARTBEAT_TABLE, --heartbeat-table HEARTBEAT_TABLE
                        If your hosts use pt-heartbeat, specify table in format db.table to use the timestamp it has for replication lag instead of Seconds_Behind_Master from SHOW SLAVE STATUS
  --ssl-mode SSL_MODE   Desired security state of the connection to the host. Supports: REQUIRED/VERIFY_CA/VERIFY_IDENTITY [default: OFF]
  --ssl-ca SSL_CA       Path to the file that contains a PEM-formatted CA certificate
  --ssl-cert SSL_CERT   Path to the file that contains a PEM-formatted client certificate
  --ssl-key SSL_KEY     Path to the file that contains a PEM-formatted private key for the client certificate
  --panels STARTUP_PANELS
                        What panels to display on startup separated by a comma. Supports: dashboard/replication/processlist/graphs [default: dashboard,processlist]
  --show-trxs-only      Start with only showing threads that have an active transaction
  --additional-columns  Start with additional columns in Processlist panel
  --use-processlist     Start with using Information Schema instead of Performance Schema for processlist panel
  -V, --version         Display version and exit

Config file with [client] section supports these options:
    host
    user
    password
    port
    socket
    ssl_mode REQUIRED/VERIFY_CA/VERIFY_IDENTITY
    ssl_ca
    ssl_cert
    ssl_key

Login path file supports these options:
    host
    user
    password
    port
    socket

Environment variables support these options:
    DOLPHIE_USER
    DOLPHIE_PASSWORD
    DOLPHIE_HOST
    DOLPHIE_PORT
    DOLPHIE_SOCKET

Supported MySQL versions

MySQL/Percona Server 5.6/5.7/8.0+
RDS/Aurora

Grants required

Least privilege

PROCESS (if you don't use performance_schema)
SELECT to performance_schema (if used) + pt-heartbeat table (if used)
REPLICATION CLIENT/REPLICATION SLAVE
BACKUP_ADMIN (MySQL 8 only)

Features

Dolphie uses panels to present groups of data. They can all be turned on/off to have a view of your database server that you prefer (see Help screenshot for panels available)
Graphs for many metrics that can give you great insight into how your database is performing
Sparkline to show queries per second in a live view
Quick switch host for connecting to different hosts instead of reloading the application. It keeps a history of the servers you connect to that provides autocompletion for hostnames
Prefers Performance Schema over Processlist if it's turned on for listing queries. Can be switched to use Processlist by pressing key "1" (or using parameter) since P_S can truncate query length for explaining queries
3 options for finding replica lag in this order of precedence:
- pt-heartbeat table (specified by --heartbeat-table)
- Performance Schema (MySQL 8 only)
- SHOW SLAVE STATUS
Host cache file. This provides users a way to specify hostnames for IPs when their network's DNS can't resolve them. An example use case for this is when you connect to your work's VPN and DNS isn't available to resolve IPs. In my opinion, it's a lot easier to look at hostnames than IPs!
Supports encrypted login credentials via mysql_config_editor
Automatic conversion of large numbers & bytes to human-readable
Notifies when new version is available
Many commands at your fingertips with autocompletion for their input

Things to note

Order of precedence for variables passed to Dolphie:

Command-line
Environment variables
~/.mylogin.cnf (mysql_config_editor)
~/.my.cnf

Feedback

I welcome all questions, bug reports, and requests. If you enjoy Dolphie, please let me know! I'd love to hear from you 😃

rscpass/dolphie-mysql-monitor