This is a simple daemon checking galera node state.
Performed checks contains:
- check if UUID of cluster and node is the same
- check if node is connected to cluster
- check if node is ready for operations
Package installation provides xaphan_galera_daemon $PATH endpoint in linux based systems.
git clone https://github.com/inthuriel/xaphan-daemon-galera.git
pip install -e ./xaphan-daemon-galera/xaphan-daemon/[user ~]~ xaphan_galera_daemon --help
usage: xaphan_galera_daemon [-h] [-c CONFIG] [-t SERVER_TYPE]
Galera state daemon.
optional arguments:
-h, --help show this help message and exit
-c CONFIG, --config CONFIG
config file path
-t SERVER_TYPE, --server_type SERVER_TYPE
type of server to runAll start parameters are optional. Sample of config files is provied in this repository. Currently two types of servers are available:
[user ~]~ xaphan_galera_daemon -t telnetOutput:
[user ~]~ telnet 127.0.0.1 9980
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
0% DOWN node_connection_check is in state: sql_err
Connection closed by foreign host.Response is in HAproxy format.
[user ~]~ xaphan_galera_daemon -t apiOutput:
[user ~]~ curl -XGET -s 'http://localhost:9981/' | python -mjson.tool
{
"endpoint": "node status",
"name": "Xaphan Daemon",
"node_status": {
"health_percent": 0,
"message": "node_connection_check is in state: sql_err",
"status": "down"
}
}defaults = {
'mysql':
{
'host': '127.0.0.1',
'port': '3307',
'user': 'checker',
'pass': '',
'charset': 'utf8'
},
'daemon':
{
'telnet': {
'ip': '0.0.0.0',
'port': '9980'
},
'api': {
'ip': '0.0.0.0',
'port': '9981'
}
},
'logger':
{
'location': '/var/log',
'name': 'xaphan-daemon',
'rotation_time': '30'
}
}- Daemon can be run by supervisorctl configuration.
- Default telnet response is good to implement in HAproxy environments.