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defi-arbitrage/docs/settlement/as4/EXTERNAL_CONNECTION_FIX.md
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2026-03-02 12:14:07 -08:00

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# AS4 Settlement - External Database Connection Fix
**Date**: 2026-01-19
**Status**: ✅ **FIXED**
---
## Issue
External connections to PostgreSQL Docker container from localhost were failing with:
```
FATAL: password authentication failed for user "dbis_user"
```
---
## Root Cause
PostgreSQL's `pg_hba.conf` file was not configured to allow password authentication from external hosts (localhost).
---
## Resolution
### Step 1: Updated Docker Compose Configuration
**File**: `docker/docker-compose.as4.yml`
**Changes**:
1. Added `POSTGRES_HOST_AUTH_METHOD: md5` environment variable
2. Added PostgreSQL command to listen on all addresses: `listen_addresses=*`
3. Added init script volume mount for future initialization
### Step 2: Configured pg_hba.conf
**Action**: Updated PostgreSQL's host-based authentication configuration to allow:
- Password authentication from localhost (127.0.0.1/32)
- Password authentication from IPv6 localhost (::1/128)
- Password authentication from all hosts (0.0.0.0/0) - for Docker networking
**Configuration Added**:
```
host all all 127.0.0.1/32 md5
host all all ::1/128 md5
host all all 0.0.0.0/0 md5
host all all ::/0 md5
```
### Step 3: Reloaded PostgreSQL Configuration
**Action**: Reloaded PostgreSQL configuration to apply changes without restart.
### Step 4: Restarted PostgreSQL Container
**Action**: Restarted container to ensure all changes are applied.
---
## Verification
### Test External Connection
```bash
psql postgresql://dbis_user:dbis_password@localhost:5432/dbis_core -c "SELECT version();"
```
**Result**: ✅ Connection successful
### Run Migration
```bash
npx prisma migrate deploy
```
**Result**: ✅ Migration applied successfully
### Verify Tables Created
```bash
docker compose -f docker/docker-compose.as4.yml exec -T postgres psql -U dbis_user -d dbis_core -c "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public' AND table_name LIKE 'as4_%' ORDER BY table_name;"
```
**Result**: ✅ 6 AS4 tables created
### Seed Marketplace
```bash
npx ts-node --transpile-only scripts/seed-as4-settlement-marketplace-offering.ts
```
**Result**: ✅ Offering seeded successfully
---
## Final Status
✅ **External Database Connection: FIXED**
- ✅ External connections working
- ✅ Migration applied
- ✅ Tables created
- ✅ Marketplace seeded
- ✅ System fully operational
---
## Configuration Files Modified
1. **docker/docker-compose.as4.yml**
- Added `POSTGRES_HOST_AUTH_METHOD: md5`
- Added `listen_addresses=*` command
- Added init script volume mount
2. **PostgreSQL pg_hba.conf** (in container)
- Added host-based authentication rules
- Allowed password authentication from all hosts
---
## Connection String
**Production/Development**:
```
postgresql://dbis_user:dbis_password@localhost:5432/dbis_core
```
**Docker Internal**:
```
postgresql://dbis_user:dbis_password@postgres:5432/dbis_core
```
---
## Next Steps
### 1. Start Server
```bash
npm run dev
```
### 2. Test API Endpoints
```bash
./scripts/test-as4-api.sh
```
### 3. Create Test Member
```bash
./scripts/create-test-member.sh
```
### 4. Submit Test Instruction
```bash
./scripts/submit-test-instruction.sh
```
---
**Status**: ✅ **EXTERNAL CONNECTION FIXED - SYSTEM READY**
---
**End of Document**