[extension/dbstorage] support for Postgres (#35757)

#### Description
Adds support for Postgres, using a test running a Postgresql docker
image.

#### Link to tracking issue
Fixes #35692

#### Testing
Run a postgresql image and test with it.

.chloggen/postgres_support.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: dbstorage
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add postgresql support
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [35692]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

extension/storage/dbstorage/client.go

@@ -17,10 +17,11 @@ import (
 )
 
 const (
-	createTable     = "create table if not exists %s (key text primary key, value blob)"
-	getQueryText    = "select value from %s where key=?"
-	setQueryText    = "insert into %s(key, value) values(?,?) on conflict(key) do update set value=?"
-	deleteQueryText = "delete from %s where key=?"
+	createTableSqlite = "create table if not exists %s (key text primary key, value blob)"
+	createTable       = "create table if not exists %s (key text primary key, value text)"
+	getQueryText      = "select value from %s where key=$1"
+	setQueryText      = "insert into %s(key, value) values($1,$2) on conflict(key) do update set value=$3"
+	deleteQueryText   = "delete from %s where key=$1"
 )
 
 type dbStorageClient struct {
@@ -30,9 +31,13 @@ type dbStorageClient struct {
 	deleteQuery *sql.Stmt
 }
 
-func newClient(ctx context.Context, db *sql.DB, tableName string) (*dbStorageClient, error) {
+func newClient(ctx context.Context, driverName string, db *sql.DB, tableName string) (*dbStorageClient, error) {
+	createTableSQL := createTable
+	if driverName == "sqlite" {
+		createTableSQL = createTableSqlite
+	}
 	var err error
-	_, err = db.ExecContext(ctx, fmt.Sprintf(createTable, tableName))
+	_, err = db.ExecContext(ctx, fmt.Sprintf(createTableSQL, tableName))
 	if err != nil {
 		return nil, err
 	}

extension/storage/dbstorage/extension.go

@@ -64,7 +64,7 @@ func (ds *databaseStorage) GetClient(ctx context.Context, kind component.Kind, e
 		fullName = fmt.Sprintf("%s_%s_%s_%s", kindString(kind), ent.Type(), ent.Name(), name)
 	}
 	fullName = strings.ReplaceAll(fullName, " ", "")
-	return newClient(ctx, ds.db, fullName)
+	return newClient(ctx, ds.driverName, ds.db, fullName)
 }
 
 func kindString(k component.Kind) string {

extension/storage/dbstorage/extension_test.go

@@ -9,17 +9,28 @@ import (
 	"sync"
 	"testing"
 
+	ctypes "github.com/docker/docker/api/types/container"
+	"github.com/docker/go-connections/nat"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"github.com/testcontainers/testcontainers-go"
+	"github.com/testcontainers/testcontainers-go/wait"
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/component/componenttest"
 	"go.opentelemetry.io/collector/extension/experimental/storage"
 	"go.opentelemetry.io/collector/extension/extensiontest"
 )
 
-func TestExtensionIntegrity(t *testing.T) {
+func TestExtensionIntegrityWithSqlite(t *testing.T) {
+	testExtensionIntegrity(t, newSqliteTestExtension(t))
+}
+
+func TestExtensionIntegrityWithPostgres(t *testing.T) {
+	testExtensionIntegrity(t, newPostgresTestExtension(t))
+}
+
+func testExtensionIntegrity(t *testing.T, se storage.Extension) {
 	ctx := context.Background()
-	se := newTestExtension(t)
 	err := se.Start(context.Background(), componenttest.NewNopHost())
 	assert.NoError(t, err)
 	defer func() {
@@ -97,7 +108,7 @@ func TestExtensionIntegrity(t *testing.T) {
 	wg.Wait()
 }
 
-func newTestExtension(t *testing.T) storage.Extension {
+func newSqliteTestExtension(t *testing.T) storage.Extension {
 	f := NewFactory()
 	cfg := f.CreateDefaultConfig().(*Config)
 	cfg.DriverName = "sqlite3"
@@ -112,6 +123,48 @@ func newTestExtension(t *testing.T) storage.Extension {
 	return se
 }
 
+func newPostgresTestExtension(t *testing.T) storage.Extension {
+	req := testcontainers.GenericContainerRequest{
+		ContainerRequest: testcontainers.ContainerRequest{
+			Image: "postgres:14",
+			HostConfigModifier: func(config *ctypes.HostConfig) {
+				ports := nat.PortMap{}
+				ports[nat.Port("5432")] = []nat.PortBinding{
+					{HostPort: "5432"},
+				}
+				config.PortBindings = ports
+			},
+			Env: map[string]string{
+				"POSTGRES_PASSWORD": "passwd",
+				"POSTGRES_USER":     "root",
+				"POSTGRES_DB":       "db",
+			},
+			WaitingFor: wait.ForListeningPort("5432"),
+		},
+		Started: true,
+	}
+
+	ctr, err := testcontainers.GenericContainer(context.Background(), req)
+	require.NoError(t, err)
+	port, err := ctr.MappedPort(context.Background(), "5432")
+	require.NoError(t, err)
+	t.Cleanup(func() {
+		require.NoError(t, ctr.Terminate(context.Background()))
+	})
+	f := NewFactory()
+	cfg := f.CreateDefaultConfig().(*Config)
+	cfg.DriverName = "pgx"
+	cfg.DataSource = fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable", "127.0.0.1", port.Port(), "root", "passwd", "db")
+
+	extension, err := f.Create(context.Background(), extensiontest.NewNopSettings(), cfg)
+	require.NoError(t, err)
+
+	se, ok := extension.(storage.Extension)
+	require.True(t, ok)
+
+	return se
+}
+
 func newTestEntity(name string) component.ID {
 	return component.MustNewIDWithName("nop", name)
 }

extension/storage/dbstorage/go.mod

@@ -3,9 +3,12 @@ module github.com/open-telemetry/opentelemetry-collector-contrib/extension/stora
 go 1.22.0
 
 require (
+	github.com/docker/docker v27.1.1+incompatible
+	github.com/docker/go-connections v0.5.0
 	github.com/jackc/pgx/v5 v5.7.1
 	github.com/mattn/go-sqlite3 v1.14.24
 	github.com/stretchr/testify v1.9.0
+	github.com/testcontainers/testcontainers-go v0.33.0
 	go.opentelemetry.io/collector/component v0.112.0
 	go.opentelemetry.io/collector/confmap v1.18.0
 	go.opentelemetry.io/collector/extension v0.112.0
@@ -15,23 +18,55 @@ require (
 )
 
 require (
+	dario.cat/mergo v1.0.0 // indirect
+	github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect
+	github.com/Microsoft/go-winio v0.6.2 // indirect
+	github.com/cenkalti/backoff/v4 v4.2.1 // indirect
+	github.com/containerd/containerd v1.7.18 // indirect
+	github.com/containerd/log v0.1.0 // indirect
+	github.com/containerd/platforms v0.2.1 // indirect
+	github.com/cpuguy83/dockercfg v0.3.1 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/distribution/reference v0.6.0 // indirect
+	github.com/docker/go-units v0.5.0 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/go-ole/go-ole v1.2.6 // indirect
 	github.com/go-viper/mapstructure/v2 v2.2.1 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/klauspost/compress v1.17.4 // indirect
 	github.com/knadh/koanf/maps v0.1.1 // indirect
 	github.com/knadh/koanf/providers/confmap v0.1.0 // indirect
 	github.com/knadh/koanf/v2 v2.1.1 // indirect
+	github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mitchellh/copystructure v1.2.0 // indirect
 	github.com/mitchellh/reflectwalk v1.0.2 // indirect
+	github.com/moby/docker-image-spec v1.3.1 // indirect
+	github.com/moby/patternmatcher v0.6.0 // indirect
+	github.com/moby/sys/sequential v0.5.0 // indirect
+	github.com/moby/sys/user v0.1.0 // indirect
+	github.com/moby/term v0.5.0 // indirect
+	github.com/morikuni/aec v1.0.0 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/opencontainers/image-spec v1.1.0 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect
+	github.com/shirou/gopsutil/v3 v3.23.12 // indirect
+	github.com/shoenig/go-m1cpu v0.1.6 // indirect
+	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/tklauser/go-sysconf v0.3.12 // indirect
+	github.com/tklauser/numcpus v0.6.1 // indirect
+	github.com/yusufpapurcu/wmi v1.2.3 // indirect
 	go.opentelemetry.io/collector/config/configtelemetry v0.112.0 // indirect
 	go.opentelemetry.io/collector/pdata v1.18.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.49.0 // indirect
 	go.opentelemetry.io/otel v1.31.0 // indirect
 	go.opentelemetry.io/otel/metric v1.31.0 // indirect
 	go.opentelemetry.io/otel/sdk v1.31.0 // indirect