fraiseql_server/backup/
postgres_backup.rs

1//! PostgreSQL backup provider.
2
3use std::collections::HashMap;
4
5use super::backup_provider::{BackupError, BackupInfo, BackupProvider, BackupResult, StorageUsage};
6
7/// PostgreSQL backup provider.
8///
9/// Uses pg_dump for logical backups and WAL archiving for point-in-time recovery.
10#[allow(dead_code)]
11pub struct PostgresBackupProvider {
12    /// PostgreSQL connection URL
13    connection_url: String,
14
15    /// Base backup directory
16    backup_dir: String,
17}
18
19impl PostgresBackupProvider {
20    /// Create new PostgreSQL backup provider.
21    pub fn new(connection_url: String, backup_dir: String) -> Self {
22        Self {
23            connection_url,
24            backup_dir,
25        }
26    }
27
28    /// Generate backup ID with timestamp.
29    fn generate_backup_id() -> String {
30        let timestamp = std::time::SystemTime::now()
31            .duration_since(std::time::UNIX_EPOCH)
32            .map(|d| d.as_secs())
33            .unwrap_or(0);
34        format!("postgres-{}", timestamp)
35    }
36}
37
38#[async_trait::async_trait]
39impl BackupProvider for PostgresBackupProvider {
40    fn name(&self) -> &'static str {
41        "postgres"
42    }
43
44    async fn health_check(&self) -> BackupResult<()> {
45        // In production, would connect and run: SELECT 1;
46        // For now, simulate success
47        Ok(())
48    }
49
50    async fn backup(&self) -> BackupResult<BackupInfo> {
51        let backup_id = Self::generate_backup_id();
52
53        // In production, would:
54        // 1. Run: pg_dump -h localhost -U postgres fraiseql > backup.sql
55        // 2. Gzip the output
56        // 3. Store to backup_dir
57        // 4. Verify by connecting and checking WAL position
58
59        Ok(BackupInfo {
60            backup_id,
61            store_name: "postgres".to_string(),
62            timestamp: std::time::SystemTime::now()
63                .duration_since(std::time::UNIX_EPOCH)
64                .map(|d| d.as_secs() as i64)
65                .unwrap_or(0),
66            size_bytes: 0,
67            verified: false,
68            compression: Some("gzip".to_string()),
69            metadata: {
70                let mut m = HashMap::new();
71                m.insert("method".to_string(), "pg_dump".to_string());
72                m.insert("wal_archived".to_string(), "true".to_string());
73                m
74            },
75        })
76    }
77
78    async fn restore(&self, backup_id: &str, verify: bool) -> BackupResult<()> {
79        // In production, would:
80        // 1. Stop all applications
81        // 2. Restore from backup: psql fraiseql < backup.sql
82        // 3. Recover WAL files if point-in-time recovery needed
83        // 4. Run ANALYZE and VACUUM
84        // 5. Verify constraints and indexes
85        if verify {
86            self.verify_backup(backup_id).await?;
87        }
88        Ok(())
89    }
90
91    async fn list_backups(&self) -> BackupResult<Vec<BackupInfo>> {
92        // In production, would list files in backup_dir
93        Ok(Vec::new())
94    }
95
96    async fn get_backup(&self, backup_id: &str) -> BackupResult<BackupInfo> {
97        Err(BackupError::NotFound {
98            store:     "postgres".to_string(),
99            backup_id: backup_id.to_string(),
100        })
101    }
102
103    async fn delete_backup(&self, _backup_id: &str) -> BackupResult<()> {
104        // In production, would delete from backup_dir
105        Ok(())
106    }
107
108    async fn verify_backup(&self, _backup_id: &str) -> BackupResult<()> {
109        // In production, would:
110        // 1. Extract backup to temp database
111        // 2. Run integrity checks
112        // 3. Verify all tables and indexes exist
113        Ok(())
114    }
115
116    async fn get_storage_usage(&self) -> BackupResult<StorageUsage> {
117        Ok(StorageUsage {
118            total_bytes:             0,
119            backup_count:            0,
120            oldest_backup_timestamp: None,
121            newest_backup_timestamp: None,
122        })
123    }
124}
125
126#[cfg(test)]
127mod tests {
128    use super::*;
129
130    #[test]
131    fn test_backup_id_generation() {
132        let id1 = PostgresBackupProvider::generate_backup_id();
133
134        assert!(id1.starts_with("postgres-"));
135        assert!(id1.len() > "postgres-".len());
136
137        // Check format: postgres-<timestamp>
138        let parts: Vec<&str> = id1.split('-').collect();
139        assert_eq!(parts.len(), 2);
140        assert!(parts[1].parse::<u64>().is_ok()); // Second part should be valid timestamp
141    }
142
143    #[tokio::test]
144    async fn test_health_check() {
145        let provider = PostgresBackupProvider::new(
146            "postgresql://localhost/test".to_string(),
147            "/tmp/backups".to_string(),
148        );
149        assert!(provider.health_check().await.is_ok());
150    }
151
152    #[tokio::test]
153    async fn test_backup_creates_backup_info() {
154        let provider = PostgresBackupProvider::new(
155            "postgresql://localhost/test".to_string(),
156            "/tmp/backups".to_string(),
157        );
158
159        let backup = provider.backup().await.unwrap();
160        assert_eq!(backup.store_name, "postgres");
161        assert!(backup.backup_id.starts_with("postgres-"));
162        assert_eq!(backup.compression, Some("gzip".to_string()));
163    }
164}
fraiseql_server/backup/postgres_backup.rs

fraiseql_server/backup/
postgres_backup.rs
