feat: multi-cluster management with pool-based load balancing
- Add ClusterPool entity for grouping clusters into named pools - Support 3 deployment modes: manual cluster, pool load-balanced, default fallback - Pool strategies: least-apps (fewest deployed apps) and round-robin - Add pool CRUD API endpoints (admin) and public pool listing - Frontend deploy page: 3-mode cluster selector (Default/Manual/Pool) - Frontend app detail: shows assigned cluster and pool info - Admin pools management page with cluster selection and strategy picker - Application entity extended with poolId field
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keyhan
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'use client';
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import { useState } from 'react';
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import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
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import api from '@/lib/api';
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import toast from 'react-hot-toast';
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import type { Cluster, ClusterPool } from '@/types';
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export default function AdminPoolsPage() {
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const queryClient = useQueryClient();
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const [showForm, setShowForm] = useState(false);
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const [editingPool, setEditingPool] = useState<ClusterPool | null>(null);
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const [form, setForm] = useState({
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name: '',
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description: '',
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strategy: 'least-apps' as 'least-apps' | 'round-robin',
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clusterIds: [] as string[],
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});
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const { data: pools = [], isLoading } = useQuery<ClusterPool[]>({
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queryKey: ['admin-pools'],
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queryFn: () => api.get('/clusters/pools').then((r) => r.data),
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});
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const { data: clusters = [] } = useQuery<Cluster[]>({
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queryKey: ['admin-clusters'],
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queryFn: () => api.get('/clusters').then((r) => r.data),
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});
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const createMutation = useMutation({
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mutationFn: (data: typeof form) => api.post('/clusters/pools', data),
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onSuccess: () => {
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queryClient.invalidateQueries({ queryKey: ['admin-pools'] });
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toast.success('Cluster pool created!');
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resetForm();
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},
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onError: (err: any) => {
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toast.error(err?.response?.data?.message || 'Failed to create pool');
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},
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});
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const updateMutation = useMutation({
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mutationFn: ({ id, data }: { id: string; data: typeof form }) =>
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api.patch(`/clusters/pools/${id}`, data),
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onSuccess: () => {
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queryClient.invalidateQueries({ queryKey: ['admin-pools'] });
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toast.success('Cluster pool updated!');
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resetForm();
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},
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onError: (err: any) => {
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toast.error(err?.response?.data?.message || 'Failed to update pool');
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},
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});
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const deleteMutation = useMutation({
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mutationFn: (id: string) => api.delete(`/clusters/pools/${id}`),
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onSuccess: () => {
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queryClient.invalidateQueries({ queryKey: ['admin-pools'] });
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toast.success('Cluster pool deleted');
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},
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});
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const resetForm = () => {
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setShowForm(false);
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setEditingPool(null);
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setForm({ name: '', description: '', strategy: 'least-apps', clusterIds: [] });
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};
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const startEdit = (pool: ClusterPool) => {
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setEditingPool(pool);
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setForm({
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name: pool.name,
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description: pool.description || '',
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strategy: pool.strategy,
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clusterIds: pool.clusterIds,
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});
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setShowForm(true);
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};
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const handleSubmit = () => {
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if (editingPool) {
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updateMutation.mutate({ id: editingPool.id, data: form });
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} else {
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createMutation.mutate(form);
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}
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};
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const toggleCluster = (clusterId: string) => {
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setForm((prev) => ({
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...prev,
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clusterIds: prev.clusterIds.includes(clusterId)
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? prev.clusterIds.filter((id) => id !== clusterId)
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: [...prev.clusterIds, clusterId],
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}));
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};
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return (
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<div className="space-y-6">
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<div className="flex justify-between items-center">
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<div>
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<h1 className="text-2xl font-bold text-gray-900">Cluster Pools</h1>
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<p className="text-sm text-gray-500 mt-1">
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Create load-balanced groups of clusters for automatic app distribution
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</p>
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</div>
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<button
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onClick={() => { showForm ? resetForm() : setShowForm(true); }}
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className="btn-primary"
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>
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{showForm ? 'Cancel' : '+ Create Pool'}
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</button>
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</div>
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{/* Create/Edit Form */}
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{showForm && (
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<div className="card space-y-4">
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<h2 className="text-lg font-semibold">
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{editingPool ? `Edit "${editingPool.name}"` : 'Create New Cluster Pool'}
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</h2>
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<div className="grid grid-cols-2 gap-4">
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<div>
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<label className="block text-sm font-medium text-gray-700 mb-1">Pool Name</label>
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<input
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className="input-field"
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placeholder="production-pool"
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value={form.name}
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onChange={(e) => setForm({ ...form, name: e.target.value })}
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/>
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</div>
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<div>
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<label className="block text-sm font-medium text-gray-700 mb-1">Strategy</label>
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<select
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className="input-field"
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value={form.strategy}
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onChange={(e) => setForm({ ...form, strategy: e.target.value as any })}
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>
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<option value="least-apps">📊 Least Apps — deploy to cluster with fewest apps</option>
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<option value="round-robin">🔄 Round Robin — rotate across clusters evenly</option>
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</select>
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</div>
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</div>
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<div>
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<label className="block text-sm font-medium text-gray-700 mb-1">Description</label>
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<input
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className="input-field"
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placeholder="Load-balanced pool for production workloads"
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value={form.description}
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onChange={(e) => setForm({ ...form, description: e.target.value })}
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/>
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</div>
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{/* Cluster selection */}
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<div>
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<label className="block text-sm font-medium text-gray-700 mb-2">
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Select Clusters ({form.clusterIds.length} selected)
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</label>
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{clusters.length === 0 ? (
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<p className="text-sm text-gray-400 py-4 text-center">
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No clusters registered. Add clusters first.
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</p>
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) : (
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<div className="grid grid-cols-1 md:grid-cols-2 gap-3">
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{clusters.map((cluster) => {
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const isSelected = form.clusterIds.includes(cluster.id);
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return (
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<button
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key={cluster.id}
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type="button"
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onClick={() => toggleCluster(cluster.id)}
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className={`p-3 rounded-xl border-2 text-left transition-all ${
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isSelected
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? 'border-primary-500 bg-primary-50 shadow-sm'
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: 'border-gray-200 hover:border-gray-300'
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}`}
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>
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<div className="flex items-center justify-between">
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<div className="flex items-center space-x-3">
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<div className={`w-5 h-5 rounded border-2 flex items-center justify-center ${
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isSelected ? 'border-primary-500 bg-primary-500' : 'border-gray-300'
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}`}>
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{isSelected && <span className="text-white text-xs">✓</span>}
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</div>
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<div>
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<p className="font-semibold text-sm text-gray-900">
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{cluster.name}
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{cluster.isDefault && (
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<span className="ml-2 text-xs bg-blue-100 text-blue-700 px-1.5 py-0.5 rounded">
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Default
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</span>
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)}
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</p>
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<p className="text-xs text-gray-500">
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{cluster.provider || 'Unknown'} · {cluster.region || 'N/A'}
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</p>
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</div>
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</div>
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<span className={`px-2 py-0.5 rounded-full text-xs font-medium ${
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cluster.status === 'active'
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? 'bg-green-100 text-green-700'
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: 'bg-red-100 text-red-700'
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}`}>
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{cluster.status}
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</span>
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</div>
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</button>
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);
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})}
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</div>
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)}
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</div>
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<div className="flex space-x-3">
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<button
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onClick={handleSubmit}
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disabled={
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!form.name ||
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form.clusterIds.length === 0 ||
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createMutation.isPending ||
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updateMutation.isPending
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}
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className="btn-primary disabled:opacity-50"
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>
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{createMutation.isPending || updateMutation.isPending
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? '⏳ Saving...'
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: editingPool
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? 'Update Pool'
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: 'Create Pool'}
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</button>
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<button onClick={resetForm} className="btn-secondary">
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Cancel
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</button>
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</div>
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</div>
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)}
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{/* Pool List */}
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{isLoading ? (
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<div className="card text-center py-12 text-gray-500">Loading pools...</div>
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) : pools.length === 0 ? (
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<div className="card text-center py-12">
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<div className="text-4xl mb-3">⚖️</div>
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<p className="text-gray-500">No cluster pools created yet</p>
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<p className="text-sm text-gray-400 mt-1">
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Create a pool to enable load-balanced deployment across multiple clusters
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</p>
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</div>
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) : (
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<div className="grid gap-4">
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{pools.map((pool) => {
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const poolClusters = clusters.filter((c) => pool.clusterIds.includes(c.id));
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const activeClusters = poolClusters.filter((c) => c.status === 'active');
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return (
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<div key={pool.id} className="card">
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<div className="flex items-start justify-between">
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<div className="flex-1">
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<div className="flex items-center space-x-3 mb-2">
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<h3 className="text-lg font-semibold text-gray-900">{pool.name}</h3>
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<span className={`px-2 py-0.5 rounded-full text-xs font-medium ${
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pool.isActive ? 'bg-green-100 text-green-700' : 'bg-gray-100 text-gray-500'
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}`}>
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{pool.isActive ? 'Active' : 'Inactive'}
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</span>
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<span className="px-2 py-0.5 bg-purple-100 text-purple-700 text-xs rounded-full font-medium">
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{pool.strategy === 'least-apps' ? '📊 Least Apps' : '🔄 Round Robin'}
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</span>
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</div>
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{pool.description && (
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<p className="text-sm text-gray-500 mb-3">{pool.description}</p>
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)}
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{/* Cluster chips */}
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<div className="flex flex-wrap gap-2">
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{poolClusters.length > 0 ? poolClusters.map((cluster) => (
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<div
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key={cluster.id}
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className={`inline-flex items-center space-x-1.5 px-3 py-1.5 rounded-lg text-xs font-medium ${
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cluster.status === 'active'
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? 'bg-green-50 text-green-700 border border-green-200'
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: 'bg-red-50 text-red-700 border border-red-200'
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}`}
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>
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<span>{cluster.status === 'active' ? '✅' : '❌'}</span>
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<span>{cluster.name}</span>
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<span className="text-gray-400">
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({cluster.provider || 'N/A'} · {cluster.region || 'N/A'})
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</span>
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</div>
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)) : (
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<p className="text-xs text-gray-400">No clusters in this pool (they may have been deleted)</p>
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)}
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</div>
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<p className="text-xs text-gray-400 mt-2">
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{activeClusters.length}/{poolClusters.length} clusters active · Created {new Date(pool.createdAt).toLocaleDateString()}
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</p>
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</div>
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<div className="flex items-center space-x-3 ml-4">
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<button
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onClick={() => startEdit(pool)}
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className="text-sm px-3 py-1.5 bg-blue-50 text-blue-700 rounded-md hover:bg-blue-100 transition-colors"
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>
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✏️ Edit
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</button>
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<button
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onClick={() => {
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if (confirm(`Delete pool "${pool.name}"? Apps already assigned to this pool will keep their current cluster.`)) {
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deleteMutation.mutate(pool.id);
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}
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}}
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className="text-sm text-red-600 hover:text-red-800"
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>
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Remove
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</button>
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</div>
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</div>
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</div>
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);
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})}
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</div>
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)}
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</div>
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);
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}
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