Added db cluster status page

db.py

@@ -42,6 +42,9 @@ if config['DB_ENGINE'] == 'sqlite':
 		params = [(p.replace(microsecond=0) if isinstance(p, datetime) else p) for p in params]
 		return operation, params
 
+	def show(operation, host=None):
+		return {}
+
 elif config['DB_ENGINE'] == 'mysql':
 	import mysql.connector
 
@@ -57,6 +60,29 @@ elif config['DB_ENGINE'] == 'mysql':
 		params = [(p.replace(microsecond=0) if isinstance(p, datetime) else p) for p in params]
 		return operation, params
 
+	def show(operation, host=config.get('MYSQL_HOST', None)):
+		if host:
+			db = mysql.connector.connect(user=config['MYSQL_USER'], password=config['MYSQL_PASSWD'], host=host, port=config.get('MYSQL_PORT', 3306))
+		else:
+			db = mysql.connector.connect(user=config['MYSQL_USER'], password=config['MYSQL_PASSWD'], unix_socket=config.get('MYSQL_UNIX', None))
+		cur = db.cursor()
+		cur.execute(operation)
+		rows = []
+		try:
+			rows = cur.fetchall()
+		except mysql.connector.errors.InterfaceError as ie:
+			if ie.msg == 'No result set to fetch from.':
+				# no problem, we were just at the end of the result set
+				pass
+			else:
+				raise
+		res = {}
+		for row in rows:
+			res[row[0]] = row[1]
+		cur.close()
+		db.close()
+		return res
+
 def query(operation, *params, delim="sep"):
 	operation, params = fix_query(operation, params)
 	cur = get_dbcursor()

server.py

@@ -70,7 +70,7 @@ app.jinja_env.globals['gitversion'] = { 'hash': output[1], 'longhash': output[0]
 if not config.get('SECRET_KEY', None):
 	config['SECRET_KEY'] = os.urandom(24)
 
-from db import query, modify, searchquery, ldapauth, ldapget
+from db import query, modify, show, searchquery, ldapauth, ldapget
 
 mod_endpoints = []
 
@@ -618,6 +618,32 @@ def legacy(phpfile=None):
 	print("Unknown legacy url:",request.url)
 	return redirect(url_for('index'),code=302)
 
+import json
+
+@app.route('/internal/dbstatus')
+@register_navbar('DB-Status', icon='ok')
+@mod_required
+def dbstatus():
+	hosts = set()
+	clusters = {}
+	status = {}
+	variables = {}
+	for host in config.get('MYSQL_DBSTATUS_HOSTS', [])+[config.get('MYSQL_HOST', None)]:
+		for _host in show('SHOW VARIABLES LIKE "wsrep_cluster_address"', host=host)['wsrep_cluster_address'][len('gcomm://'):].split(','):
+			hosts.add(_host)
+	for host in hosts:
+		try:
+			status[host] = show('SHOW GLOBAL STATUS LIKE "wsrep%"', host=host)
+			variables[host] = show('SHOW GLOBAL VARIABLES LIKE "wsrep%"', host=host)
+		except:
+			status[host] = {'wsrep_cluster_state_uuid': '', 'wsrep_local_state_comment': 'Not reachable', 'wsrep_cluster_conf_id': '0', 'wsrep_cluster_status': 'Unknown'}
+			variables[host] = {'wsrep_node_name': host, 'wsrep_cluster_name': 'unknown'}
+		cluster = variables[host]['wsrep_cluster_name']+'-'+status[host]['wsrep_cluster_conf_id']
+		if cluster not in clusters:
+			clusters[cluster] = []
+		clusters[cluster].append(host)
+	return render_template('dbstatus.html', clusters=clusters, statuses=status, vars=variables), 200
+
 import edit
 import feeds
 import importer

templates/dbstatus.html

+{% extends "base.html" %}
+{% block content %}
+<div class="panel panel-default">
+	<div class="panel-heading"><h1 class="panel-title">Cluster</b></h1></div>
+	<ul class="list-group">
+		{% for clustername, clusternodes in clusters.items() %}
+		<li class="list-group-item"><strong>{{vars[clusternodes|first]['wsrep_cluster_name']}}</strong> ({{statuses[clusternodes|first]['wsrep_cluster_status']}}, Größe={{statuses[clusternodes|first]['wsrep_cluster_size']}}, Konfiguration={{statuses[clusternodes|first]['wsrep_cluster_conf_id']}})
+		<ul class="list-group">
+			{% for host in clusternodes %}
+			<li class="list-group-item list-group-item-{{{'1': 'warning', '2': 'warning', '3': 'info', '4': 'success'}.get(statuses[host]['wsrep_local_state'], 'danger')}}"><a href="#{{host|tagid}}">{{vars[host]['wsrep_node_name']}}</a> ({{statuses[host]['wsrep_local_state_comment']}}, Letzte Änderung={{statuses[host]['wsrep_last_committed']}}, Recv.-Avg.={{statuses[host]['wsrep_local_recv_queue_avg']}}, Send-Avg.={{statuses[host]['wsrep_local_send_queue_avg']}})</li>
+			{% endfor %}
+		</ul>
+		</li>
+		{% endfor %}
+	</ul>
+	</table>
+</div>
+{% for host, status in statuses.items() %}
+<div class="panel panel-default" id="{{host|tagid}}">
+	<div class="panel-heading"><h1 class="panel-title">{{vars[host]['wsrep_node_name']}}</h1></div>
+	<div class="row" style="margin: 0px;">
+		<div class="col-xs-6 table-responsive">
+			<table class="table">
+				<tr>
+					<th>Variable</th>
+					<th>Wert</th>
+				</tr>
+				{% for key, value in vars[host].items() %}
+				<tr>
+					<td>{{key}}</td>
+					<td>{{value}}</td>
+				</tr>
+				{% endfor %}
+			</table>
+		</div>
+		<div class="col-xs-6 table-responsive">
+			<table class="table">
+				<tr>
+					<th>Status-Variable</th>
+					<th>Wert</th>
+				</tr>
+				{% for key, value in status.items() %}
+				<tr>
+					<td>{{key}}</td>
+					<td>{{value}}</td>
+				</tr>
+				{% endfor %}
+			</table>
+		</div>
+	</div>
+</div>
+{% endfor %}
+{% endblock %}