forked from hashicorp/terraform
/
resource_postgresql_database.go
521 lines (445 loc) · 14.6 KB
/
resource_postgresql_database.go
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package postgresql
import (
"bytes"
"database/sql"
"errors"
"fmt"
"log"
"strings"
"github.com/hashicorp/errwrap"
"github.com/hashicorp/terraform/helper/schema"
"github.com/lib/pq"
)
const (
dbAllowConnsAttr = "allow_connections"
dbCTypeAttr = "lc_ctype"
dbCollationAttr = "lc_collate"
dbConnLimitAttr = "connection_limit"
dbEncodingAttr = "encoding"
dbIsTemplateAttr = "is_template"
dbNameAttr = "name"
dbOwnerAttr = "owner"
dbTablespaceAttr = "tablespace_name"
dbTemplateAttr = "template"
)
func resourcePostgreSQLDatabase() *schema.Resource {
return &schema.Resource{
Create: resourcePostgreSQLDatabaseCreate,
Read: resourcePostgreSQLDatabaseRead,
Update: resourcePostgreSQLDatabaseUpdate,
Delete: resourcePostgreSQLDatabaseDelete,
Exists: resourcePostgreSQLDatabaseExists,
Importer: &schema.ResourceImporter{
State: schema.ImportStatePassthrough,
},
Schema: map[string]*schema.Schema{
dbNameAttr: {
Type: schema.TypeString,
Required: true,
Description: "The PostgreSQL database name to connect to",
},
dbOwnerAttr: {
Type: schema.TypeString,
Optional: true,
Computed: true,
Description: "The ROLE which owns the database",
},
dbTemplateAttr: {
Type: schema.TypeString,
Optional: true,
ForceNew: true,
Computed: true,
Description: "The name of the template from which to create the new database",
},
dbEncodingAttr: {
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
Description: "Character set encoding to use in the new database",
},
dbCollationAttr: {
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
Description: "Collation order (LC_COLLATE) to use in the new database",
},
dbCTypeAttr: {
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
Description: "Character classification (LC_CTYPE) to use in the new database",
},
dbTablespaceAttr: {
Type: schema.TypeString,
Optional: true,
Computed: true,
Description: "The name of the tablespace that will be associated with the new database",
},
dbConnLimitAttr: {
Type: schema.TypeInt,
Optional: true,
Default: -1,
Description: "How many concurrent connections can be made to this database",
ValidateFunc: validateConnLimit,
},
dbAllowConnsAttr: {
Type: schema.TypeBool,
Optional: true,
Default: true,
Description: "If false then no one can connect to this database",
},
dbIsTemplateAttr: {
Type: schema.TypeBool,
Optional: true,
Computed: true,
Description: "If true, then this database can be cloned by any user with CREATEDB privileges",
},
},
}
}
func resourcePostgreSQLDatabaseCreate(d *schema.ResourceData, meta interface{}) error {
c := meta.(*Client)
c.catalogLock.Lock()
defer c.catalogLock.Unlock()
conn, err := c.Connect()
if err != nil {
return errwrap.Wrapf("Error connecting to PostgreSQL: {{err}}", err)
}
defer conn.Close()
dbName := d.Get(dbNameAttr).(string)
b := bytes.NewBufferString("CREATE DATABASE ")
fmt.Fprint(b, pq.QuoteIdentifier(dbName))
//needed in order to set the owner of the db if the connection user is not a superuser
err = grantRoleMembership(conn, d.Get(dbOwnerAttr).(string), c.username)
if err != nil {
return errwrap.Wrapf(fmt.Sprintf("Error adding connection user (%q) to ROLE %q: {{err}}", c.username, d.Get(dbOwnerAttr).(string)), err)
}
defer func() {
//undo the grant if the connection user is not a superuser
err = revokeRoleMembership(conn, d.Get(dbOwnerAttr).(string), c.username)
if err != nil {
err = errwrap.Wrapf(fmt.Sprintf("Error removing connection user (%q) from ROLE %q: {{err}}", c.username, d.Get(dbOwnerAttr).(string)), err)
}
}()
// Handle each option individually and stream results into the query
// buffer.
switch v, ok := d.GetOk(dbOwnerAttr); {
case ok:
fmt.Fprint(b, " OWNER ", pq.QuoteIdentifier(v.(string)))
default:
// No owner specified in the config, default to using
// the connecting username.
fmt.Fprint(b, " OWNER ", pq.QuoteIdentifier(c.username))
}
switch v, ok := d.GetOk(dbTemplateAttr); {
case ok:
fmt.Fprint(b, " TEMPLATE ", pq.QuoteIdentifier(v.(string)))
case v.(string) == "", strings.ToUpper(v.(string)) != "DEFAULT":
fmt.Fprint(b, " TEMPLATE template0")
}
switch v, ok := d.GetOk(dbEncodingAttr); {
case ok:
fmt.Fprint(b, " ENCODING ", pq.QuoteIdentifier(v.(string)))
case v.(string) == "", strings.ToUpper(v.(string)) != "DEFAULT":
fmt.Fprint(b, ` ENCODING "UTF8"`)
}
switch v, ok := d.GetOk(dbCollationAttr); {
case ok:
fmt.Fprint(b, " LC_COLLATE ", pq.QuoteIdentifier(v.(string)))
case v.(string) == "", strings.ToUpper(v.(string)) != "DEFAULT":
fmt.Fprint(b, ` LC_COLLATE "C"`)
}
switch v, ok := d.GetOk(dbCTypeAttr); {
case ok:
fmt.Fprint(b, " LC_CTYPE ", pq.QuoteIdentifier(v.(string)))
case v.(string) == "", strings.ToUpper(v.(string)) != "DEFAULT":
fmt.Fprint(b, ` LC_CTYPE "C"`)
}
if v, ok := d.GetOk(dbTablespaceAttr); ok {
fmt.Fprint(b, " TABLESPACE ", pq.QuoteIdentifier(v.(string)))
}
{
val := d.Get(dbAllowConnsAttr).(bool)
fmt.Fprint(b, " ALLOW_CONNECTIONS ", val)
}
{
val := d.Get(dbConnLimitAttr).(int)
fmt.Fprint(b, " CONNECTION LIMIT ", val)
}
{
val := d.Get(dbIsTemplateAttr).(bool)
fmt.Fprint(b, " IS_TEMPLATE ", val)
}
query := b.String()
_, err = conn.Query(query)
if err != nil {
return errwrap.Wrapf(fmt.Sprintf("Error creating database %q: {{err}}", dbName), err)
}
d.SetId(dbName)
// Set err outside of the return so that the deferred revoke can override err
// if necessary.
err = resourcePostgreSQLDatabaseReadImpl(d, meta)
return err
}
func resourcePostgreSQLDatabaseDelete(d *schema.ResourceData, meta interface{}) error {
c := meta.(*Client)
c.catalogLock.Lock()
defer c.catalogLock.Unlock()
conn, err := c.Connect()
if err != nil {
return errwrap.Wrapf("Error connecting to PostgreSQL: {{err}}", err)
}
defer conn.Close()
dbName := d.Get(dbNameAttr).(string)
if isTemplate := d.Get(dbIsTemplateAttr).(bool); isTemplate {
// Template databases must have this attribute cleared before
// they can be dropped.
if err := doSetDBIsTemplate(conn, dbName, false); err != nil {
return errwrap.Wrapf("Error updating database IS_TEMPLATE during DROP DATABASE: {{err}}", err)
}
}
if err := setDBIsTemplate(conn, d); err != nil {
return err
}
query := fmt.Sprintf("DROP DATABASE %s", pq.QuoteIdentifier(dbName))
_, err = conn.Query(query)
if err != nil {
return errwrap.Wrapf("Error dropping database: {{err}}", err)
}
d.SetId("")
return nil
}
func resourcePostgreSQLDatabaseExists(d *schema.ResourceData, meta interface{}) (bool, error) {
c := meta.(*Client)
c.catalogLock.RLock()
defer c.catalogLock.RUnlock()
conn, err := c.Connect()
if err != nil {
return false, err
}
defer conn.Close()
var dbName string
err = conn.QueryRow("SELECT d.datname from pg_database d WHERE datname=$1", d.Id()).Scan(&dbName)
switch {
case err == sql.ErrNoRows:
return false, nil
case err != nil:
return false, err
}
return true, nil
}
func resourcePostgreSQLDatabaseRead(d *schema.ResourceData, meta interface{}) error {
c := meta.(*Client)
c.catalogLock.RLock()
defer c.catalogLock.RUnlock()
return resourcePostgreSQLDatabaseReadImpl(d, meta)
}
func resourcePostgreSQLDatabaseReadImpl(d *schema.ResourceData, meta interface{}) error {
c := meta.(*Client)
conn, err := c.Connect()
if err != nil {
return err
}
defer conn.Close()
dbId := d.Id()
var dbName, ownerName string
err = conn.QueryRow("SELECT d.datname, pg_catalog.pg_get_userbyid(d.datdba) from pg_database d WHERE datname=$1", dbId).Scan(&dbName, &ownerName)
switch {
case err == sql.ErrNoRows:
log.Printf("[WARN] PostgreSQL database (%q) not found", dbId)
d.SetId("")
return nil
case err != nil:
return errwrap.Wrapf("Error reading database: {{err}}", err)
}
var dbEncoding, dbCollation, dbCType, dbTablespaceName string
var dbConnLimit int
var dbAllowConns, dbIsTemplate bool
err = conn.QueryRow(`SELECT pg_catalog.pg_encoding_to_char(d.encoding), d.datcollate, d.datctype, ts.spcname, d.datconnlimit, d.datallowconn, d.datistemplate FROM pg_catalog.pg_database AS d, pg_catalog.pg_tablespace AS ts WHERE d.datname = $1 AND d.dattablespace = ts.oid`, dbId).
Scan(
&dbEncoding, &dbCollation, &dbCType, &dbTablespaceName,
&dbConnLimit, &dbAllowConns, &dbIsTemplate,
)
switch {
case err == sql.ErrNoRows:
log.Printf("[WARN] PostgreSQL database (%q) not found", dbId)
d.SetId("")
return nil
case err != nil:
return errwrap.Wrapf("Error reading database: {{err}}", err)
default:
d.Set(dbNameAttr, dbName)
d.Set(dbOwnerAttr, ownerName)
d.Set(dbEncodingAttr, dbEncoding)
d.Set(dbCollationAttr, dbCollation)
d.Set(dbCTypeAttr, dbCType)
d.Set(dbTablespaceAttr, dbTablespaceName)
d.Set(dbConnLimitAttr, dbConnLimit)
d.Set(dbAllowConnsAttr, dbAllowConns)
d.Set(dbIsTemplateAttr, dbIsTemplate)
dbTemplate := d.Get(dbTemplateAttr).(string)
if dbTemplate == "" {
dbTemplate = "template0"
}
d.Set(dbTemplateAttr, dbTemplate)
return nil
}
}
func resourcePostgreSQLDatabaseUpdate(d *schema.ResourceData, meta interface{}) error {
c := meta.(*Client)
c.catalogLock.Lock()
defer c.catalogLock.Unlock()
conn, err := c.Connect()
if err != nil {
return err
}
defer conn.Close()
if err := setDBName(conn, d); err != nil {
return err
}
if err := setDBOwner(c, conn, d); err != nil {
return err
}
if err := setDBTablespace(conn, d); err != nil {
return err
}
if err := setDBConnLimit(conn, d); err != nil {
return err
}
if err := setDBAllowConns(conn, d); err != nil {
return err
}
if err := setDBIsTemplate(conn, d); err != nil {
return err
}
// Empty values: ALTER DATABASE name RESET configuration_parameter;
return resourcePostgreSQLDatabaseReadImpl(d, meta)
}
func setDBName(conn *sql.DB, d *schema.ResourceData) error {
if !d.HasChange(dbNameAttr) {
return nil
}
oraw, nraw := d.GetChange(dbNameAttr)
o := oraw.(string)
n := nraw.(string)
if n == "" {
return errors.New("Error setting database name to an empty string")
}
query := fmt.Sprintf("ALTER DATABASE %s RENAME TO %s", pq.QuoteIdentifier(o), pq.QuoteIdentifier(n))
if _, err := conn.Query(query); err != nil {
return errwrap.Wrapf("Error updating database name: {{err}}", err)
}
d.SetId(n)
return nil
}
func setDBOwner(c *Client, conn *sql.DB, d *schema.ResourceData) error {
if !d.HasChange(dbOwnerAttr) {
return nil
}
owner := d.Get(dbOwnerAttr).(string)
if owner == "" {
return nil
}
//needed in order to set the owner of the db if the connection user is not a superuser
err := grantRoleMembership(conn, d.Get(dbOwnerAttr).(string), c.username)
if err != nil {
return errwrap.Wrapf(fmt.Sprintf("Error adding connection user (%q) to ROLE %q: {{err}}", c.username, d.Get(dbOwnerAttr).(string)), err)
}
defer func() {
// undo the grant if the connection user is not a superuser
err = revokeRoleMembership(conn, d.Get(dbOwnerAttr).(string), c.username)
if err != nil {
err = errwrap.Wrapf(fmt.Sprintf("Error removing connection user (%q) from ROLE %q: {{err}}", c.username, d.Get(dbOwnerAttr).(string)), err)
}
}()
dbName := d.Get(dbNameAttr).(string)
query := fmt.Sprintf("ALTER DATABASE %s OWNER TO %s", pq.QuoteIdentifier(dbName), pq.QuoteIdentifier(owner))
if _, err := conn.Query(query); err != nil {
return errwrap.Wrapf("Error updating database OWNER: {{err}}", err)
}
return err
}
func setDBTablespace(conn *sql.DB, d *schema.ResourceData) error {
if !d.HasChange(dbTablespaceAttr) {
return nil
}
tbspName := d.Get(dbTablespaceAttr).(string)
dbName := d.Get(dbNameAttr).(string)
var query string
if tbspName == "" || strings.ToUpper(tbspName) == "DEFAULT" {
query = fmt.Sprintf("ALTER DATABASE %s RESET TABLESPACE", pq.QuoteIdentifier(dbName))
} else {
query = fmt.Sprintf("ALTER DATABASE %s SET TABLESPACE %s", pq.QuoteIdentifier(dbName), pq.QuoteIdentifier(tbspName))
}
if _, err := conn.Query(query); err != nil {
return errwrap.Wrapf("Error updating database TABLESPACE: {{err}}", err)
}
return nil
}
func setDBConnLimit(conn *sql.DB, d *schema.ResourceData) error {
if !d.HasChange(dbConnLimitAttr) {
return nil
}
connLimit := d.Get(dbConnLimitAttr).(int)
dbName := d.Get(dbNameAttr).(string)
query := fmt.Sprintf("ALTER DATABASE %s CONNECTION LIMIT = %d", pq.QuoteIdentifier(dbName), connLimit)
if _, err := conn.Query(query); err != nil {
return errwrap.Wrapf("Error updating database CONNECTION LIMIT: {{err}}", err)
}
return nil
}
func setDBAllowConns(conn *sql.DB, d *schema.ResourceData) error {
if !d.HasChange(dbAllowConnsAttr) {
return nil
}
allowConns := d.Get(dbAllowConnsAttr).(bool)
dbName := d.Get(dbNameAttr).(string)
query := fmt.Sprintf("ALTER DATABASE %s ALLOW_CONNECTIONS %t", pq.QuoteIdentifier(dbName), allowConns)
if _, err := conn.Query(query); err != nil {
return errwrap.Wrapf("Error updating database ALLOW_CONNECTIONS: {{err}}", err)
}
return nil
}
func setDBIsTemplate(conn *sql.DB, d *schema.ResourceData) error {
if !d.HasChange(dbIsTemplateAttr) {
return nil
}
if err := doSetDBIsTemplate(conn, d.Get(dbNameAttr).(string), d.Get(dbIsTemplateAttr).(bool)); err != nil {
return errwrap.Wrapf("Error updating database IS_TEMPLATE: {{err}}", err)
}
return nil
}
func doSetDBIsTemplate(conn *sql.DB, dbName string, isTemplate bool) error {
query := fmt.Sprintf("ALTER DATABASE %s IS_TEMPLATE %t", pq.QuoteIdentifier(dbName), isTemplate)
if _, err := conn.Query(query); err != nil {
return errwrap.Wrapf("Error updating database IS_TEMPLATE: {{err}}", err)
}
return nil
}
func grantRoleMembership(conn *sql.DB, dbOwner string, connUsername string) error {
if dbOwner != "" && dbOwner != connUsername {
query := fmt.Sprintf("GRANT %s TO %s", pq.QuoteIdentifier(dbOwner), pq.QuoteIdentifier(connUsername))
_, err := conn.Query(query)
if err != nil {
// is already member or role
if strings.Contains(err.Error(), "duplicate key value violates unique constraint") {
return nil
}
return errwrap.Wrapf("Error granting membership: {{err}}", err)
}
}
return nil
}
func revokeRoleMembership(conn *sql.DB, dbOwner string, connUsername string) error {
if dbOwner != "" && dbOwner != connUsername {
query := fmt.Sprintf("REVOKE %s FROM %s", pq.QuoteIdentifier(dbOwner), pq.QuoteIdentifier(connUsername))
_, err := conn.Query(query)
if err != nil {
return errwrap.Wrapf("Error revoking membership: {{err}}", err)
}
}
return nil
}