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feat: Add random and first balance methods support

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- Add 'random' and 'first' options to backend balance method selector
- Add balance method validation in config parser with warning for unknown methods
- Update API documentation with all supported balance algorithms
This commit is contained in:
taylanbakircioglu
2026-01-26 15:25:15 +03:00
parent bc8563d455
commit 5d054f3426
3 changed files with 33 additions and 3 deletions
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backend/routers/backend.py
+4 -1
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@@ -193,10 +193,13 @@ async def get_backends(cluster_id: Optional[int] = None, include_inactive: bool
```
## Load Balancing Methods
- **roundrobin**: Each server used in turn
- **roundrobin**: Each server used in turn (default)
- **leastconn**: Server with least connections
- **source**: Based on source IP hash
- **uri**: Based on URI hash
- **static-rr**: Static round-robin (no dynamic weight)
- **random**: Random server selection (HAProxy 1.9+)
- **first**: First server with available slots
"""
try:
conn = await get_database_connection()
backend/utils/haproxy_config_parser.py
+27 -2
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@@ -563,10 +563,35 @@ class HAProxyConfigParser:
if mode_match:
backend.mode = mode_match.group(1).lower()
# Parse balance method
# Parse balance method with validation
balance_match = re.match(r'^balance\s+(\S+)', line, re.IGNORECASE)
if balance_match:
backend.balance_method = balance_match.group(1)
balance_value = balance_match.group(1).lower()
# HAProxy supported balance algorithms
supported_balance_methods = [
'roundrobin', # Each server used in turn
'static-rr', # Static round-robin (no dynamic weight)
'leastconn', # Server with least connections
'first', # First server with available slots
'source', # Based on source IP hash
'uri', # Based on URI hash
'url_param', # Based on URL parameter
'hdr', # Based on HTTP header
'random', # Random server selection (HAProxy 1.9+)
'rdp-cookie', # Based on RDP cookie
]
if balance_value in supported_balance_methods:
backend.balance_method = balance_value
else:
# Unknown balance method - use default and warn
self.warnings.append(
f"Backend '{name}': Unknown balance method '{balance_value}' detected. "
f"Supported methods: {', '.join(supported_balance_methods)}. "
f"Using default 'roundrobin' instead."
)
backend.balance_method = 'roundrobin'
# Parse timeout directives
timeout_connect_match = re.match(r'^timeout\s+connect\s+(\d+)(ms|s|m|h)?', line, re.IGNORECASE)
frontend/src/components/BackendServers.js
+2
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@@ -1614,6 +1614,8 @@ const BackendServers = () => {
<Option value="source">Source IP</Option>
<Option value="uri">URI</Option>
<Option value="static-rr">Static Round Robin</Option>
<Option value="random">Random</Option>
<Option value="first">First Available</Option>
</Select>
</Form.Item>
</Col>