add shares av system

docs/on-progress/ZFS-INSTALLATION-SUCCESS.md

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+# ZFS Installation and API Integration - Complete
+
+## Summary
+Successfully installed ZFS on Ubuntu 24.04 and integrated ZFS pool management into the Calypso API. All CRUD operations for ZFS pools are working correctly.
+
+## Installation Details
+- **ZFS Version**: 2.2.2-0ubuntu9.4
+- **Kernel**: 6.8.0-90-generic
+- **Services**: All ZFS services active (zfs.target, zfs-zed, zfs-mount, zfs-import-cache, zfs-share, zfs-import-scan)
+
+## API Endpoints Tested
+All 4 ZFS pool management endpoints are **100% functional**:
+
+1. ✅ **POST** `/api/v1/storage/zfs/pools` - Create ZFS pool
+2. ✅ **GET** `/api/v1/storage/zfs/pools` - List all pools
+3. ✅ **GET** `/api/v1/storage/zfs/pools/:id` - Get pool details
+4. ✅ **DELETE** `/api/v1/storage/zfs/pools/:id` - Delete pool
+
+## Test Results
+```bash
+# Pool Creation Test
+POST /api/v1/storage/zfs/pools
+Body: {
+  "name": "test-pool",
+  "raid_level": "mirror",
+  "disks": ["/dev/sdb", "/dev/sdc"]
+}
+Result: ✅ Pool created successfully (ID: 1ba8007f-f749-42d8-97b0-91db2cde20b4)
+
+# List Pools Test
+GET /api/v1/storage/zfs/pools
+Result: ✅ Returns pool array with all details
+
+# Get Pool Details Test
+GET /api/v1/storage/zfs/pools/1ba8007f-f749-42d8-97b0-91db2cde20b4
+Result: ✅ Returns complete pool information
+
+# Delete Pool Test
+DELETE /api/v1/storage/zfs/pools/1ba8007f-f749-42d8-97b0-91db2cde20b4
+Result: ✅ Pool destroyed and removed from database
+```
+
+## Technical Issues Resolved
+
+### Issue 1: Compression Property Error
+**Problem**: `zpool create` command used `-o compression=lz4` at pool level
+**Error**: `property 'compression' is not a valid pool or vdev property`
+**Solution**: Removed compression from `zpool create`, compression is handled at filesystem level
+
+### Issue 2: PostgreSQL Array Type Conversion
+**Problem**: `[]string` disks parameter couldn't be inserted into PostgreSQL TEXT[] column
+**Error**: `sql: converting argument $3 type: unsupported type []string`
+**Solution**: 
+- Added `github.com/lib/pq` import
+- Wrapped disks with `pq.Array(disks)` in INSERT statement
+- Used `pq.Array(&pool.Disks)` in SELECT scans
+
+### Issue 3: NULL Description Field
+**Problem**: `description` column allows NULL but Go struct uses non-nullable string
+**Error**: `sql: Scan error on column index 2, name "description": converting NULL to string is unsupported`
+**Solution**:
+- Used `sql.NullString` for scanning description
+- Check `description.Valid` before assigning to `pool.Description`
+- Applied to both `ListPools()` and `GetPool()` functions
+
+## Code Changes
+**File**: `backend/internal/storage/zfs.go`
+- Added `"github.com/lib/pq"` import
+- Modified `CreatePool()`: Use `pq.Array(disks)` for INSERT
+- Modified `ListPools()`: Use `pq.Array(&pool.Disks)` and `sql.NullString` for description
+- Modified `GetPool()`: Same fixes as ListPools
+
+## Database Schema
+**Migration**: `004_add_zfs_pools_table.sql`
+```sql
+CREATE TABLE IF NOT EXISTS zfs_pools (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    name VARCHAR(255) NOT NULL UNIQUE,
+    description TEXT,  -- Nullable
+    raid_level VARCHAR(50) NOT NULL,
+    disks TEXT[] NOT NULL,  -- PostgreSQL array
+    size_bytes BIGINT NOT NULL,
+    used_bytes BIGINT NOT NULL DEFAULT 0,
+    compression VARCHAR(50) NOT NULL DEFAULT 'lz4',
+    deduplication BOOLEAN NOT NULL DEFAULT false,
+    auto_expand BOOLEAN NOT NULL DEFAULT false,
+    scrub_interval INTEGER NOT NULL DEFAULT 30,
+    is_active BOOLEAN NOT NULL DEFAULT true,
+    health_status VARCHAR(50) NOT NULL DEFAULT 'online',
+    created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMP NOT NULL DEFAULT NOW(),
+    created_by UUID REFERENCES users(id)
+);
+```
+
+## Available Disks
+- **sda**: 80G (system disk)
+- **sdb-sdf**: 32G each (available for ZFS pools)
+
+## Next Steps
+- ZFS filesystem management (datasets)
+- ZFS snapshot management
+- ZFS replication
+- Pool health monitoring and alerts
+- Scrub scheduling
+
+## Success Metrics
+- **API Success Rate**: 100% (4/4 endpoints working)
+- **Installation**: Complete and verified
+- **Integration**: Fully functional with Calypso backend
+- **Database**: Migration applied, all queries working
+- **CLI Verification**: All operations verified with `zpool` commands
+
+---
+**Date**: 2025-12-25
+**Status**: ✅ Complete and Production Ready