feat: implement resource validation checks for production deployment

- Added a new ResourceChecker type to validate system resources including disk space, RAM, and CPU cores.
- Implemented CheckDiskSpace, CheckRAM, and CheckCPU methods to ensure minimum requirements are met for production deployment.
- Integrated resource checks into the ProductionSetup's Phase1CheckPrerequisites method to enhance deployment reliability.
- Updated systemd service generation to log output to specific log files instead of the journal for better log management.

CHANGELOG.md

@@ -13,6 +13,19 @@ The format is based on [Keep a Changelog][keepachangelog] and adheres to [Semant
 ### Deprecated
 
 ### Fixed
+## [0.66.1] - 2025-11-11
+
+### Added
+\n
+### Changed
+- Allow bootstrap nodes to optionally define a join address to synchronize with another bootstrap cluster.
+
+### Deprecated
+
+### Removed
+
+### Fixed
+\n
 ## [0.66.0] - 2025-11-11
 
 ### Added

Makefile

@@ -19,7 +19,7 @@ test-e2e:
 
 .PHONY: build clean test run-node run-node2 run-node3 run-example deps tidy fmt vet lint clear-ports install-hooks kill
 
-VERSION := 0.66.0
+VERSION := 0.66.1
 COMMIT  ?= $(shell git rev-parse --short HEAD 2>/dev/null || echo unknown)
 DATE    ?= $(shell date -u +%Y-%m-%dT%H:%M:%SZ)
 LDFLAGS := -X 'main.version=$(VERSION)' -X 'main.commit=$(COMMIT)' -X 'main.date=$(DATE)'

README.md

@@ -67,7 +67,7 @@ Use `make dev` for the complete stack or run binaries individually with `go run
 
 All runtime configuration lives in `~/.debros/`.
 
-- `bootstrap.yaml`: `type: bootstrap`, blank `database.rqlite_join_address`
+- `bootstrap.yaml`: `type: bootstrap`, optionally set `database.rqlite_join_address` to join another bootstrap's cluster
 - `node*.yaml`: `type: node`, set `database.rqlite_join_address` (e.g. `localhost:7001`) and include the bootstrap `discovery.bootstrap_peers`
 - `gateway.yaml`: configure `gateway.bootstrap_peers`, `gateway.namespace`, and optional auth flags
 
@@ -75,7 +75,7 @@ Validation reminders:
 
 - HTTP and Raft ports must differ
 - Non-bootstrap nodes require a join address and bootstrap peers
-- Bootstrap nodes cannot define a join address
+- Bootstrap nodes can optionally define a join address to synchronize with another bootstrap
 - Multiaddrs must end with `/p2p/<peerID>`
 
 Regenerate configs any time with `./bin/dbn config init --force`.

pkg/config/validate.go

@@ -493,12 +493,7 @@ func (c *Config) validateCrossFields() []error {
 	}
 
 	// Cross-check rqlite_join_address vs node type
-	if c.Node.Type == "bootstrap" && c.Database.RQLiteJoinAddress != "" {
-		errs = append(errs, ValidationError{
-			Path:    "database.rqlite_join_address",
-			Message: "must be empty for bootstrap node type",
-		})
-	}
+	// Note: Bootstrap nodes can optionally join another bootstrap's cluster
 
 	if c.Node.Type == "node" && c.Database.RQLiteJoinAddress == "" {
 		errs = append(errs, ValidationError{

pkg/config/validate_test.go

@@ -183,7 +183,7 @@ func TestValidateRQLiteJoinAddress(t *testing.T) {
 	}{
 		{"node with join", "node", "localhost:5001", false},
 		{"node without join", "node", "", true},
-		{"bootstrap with join", "bootstrap", "localhost:5001", true},
+		{"bootstrap with join", "bootstrap", "localhost:5001", false},
 		{"bootstrap without join", "bootstrap", "", false},
 		{"invalid join format", "node", "localhost", true},
 		{"invalid join port", "node", "localhost:99999", true},