I have no trouble connecting go pgxpool to a postgresql database in a docker container but can't figure out how to write a connection URL string for a linode postgresql RDS. Specifically, what is the first part of the URL "postgres://"? I can't find any example for a connection URL other than a local db and no code examples for a DSN connection.
Can somebody please help me out with either a connection URL or DSN for these details?
Here is my current connection string which returns "host is invalid". ssl_mode is also invalid.
config, err := pgxpool.ParseConfig("user=linpostgres, password=secret, host=lin-9930-2356-pgsql-primary.servers.linodedb.net, port=5432 dbname=mydb, pool_max_conns=10")
This psq connect string times out: psql --username=linpostgres --host=lin-9930-2356-pgsql-primary.servers.linodedb.net port=5432 --password
You can check the code official GitHub repository code here: link
// See Config for definitions of these arguments.
//
// # Example DSN
// user=jack password=secret host=pg.example.com port=5432 dbname=mydb sslmode=verify-ca pool_max_conns=10
//
// # Example URL
// postgres://jack:secret#pg.example.com:5432/mydb?sslmode=verify-ca&pool_max_conns=10
so your connection string should be
postgres://jack:secret#pg.example.com:5432/mydb?sslmode=verify-ca&pool_max_conns=10
hope this helps
Related
I'm trying to deploy a Go backend on Google App Engine, connecting to CloudSQL. Deploy magic is working, but when I try to call the API, I get a 500 status:
Error: Server Error
The server encountered an error and could not complete your request.
Please try again in 30 seconds.
When running gcloud app logs tail -s default, I have:
2020/06/07 21:39:26 server.go:52: dial unix /cloudsql/: connect: is a directory
var dbURI string
dbURI = fmt.Sprintf("%s:%s#unix(/cloudsql/%s)/%s", dbUser, dbPwd, dbHost, dbName)
// Open database connection
db, err := gorm.Open(
"mysql",
dbURI,
)
if err != nil {
log.Fatal(err) <-- line 52
}
My app.yaml is setup correctly (I think..):
env_variables:
CLOUDSQL_CONNECTION_NAME: 'XXXXX:europe-west1:XXXXXX'
DB_USER: 'root'
DB_PASS: 'XXXXX'
DB_NAME: 'XXXXX'
Any help would be appreciated :)
I was indeed not using the right ENV variable.. Thank you for pointing that out #Muffin Top
I've tried several attempt to connect Oracle DB but still unable to connect. Following is my code to connect. However, I could connect Oracle DB through the terminal like this:
$ sqlplus64 uid/passwd#192.168.0.5:1521/WSVC
My evironment: Ubuntu 16.04 / 64bit / Python3.5
I wish your knowledge and experience associated with this issue to be shared. Thank you.
import os
os.chdir("/usr/lib/oracle/12.2/client64/lib")
import cx_Oracle
# 1st attempt
ip = '192.168.0.5'
port = 1521
SID = 'WSVC'
dsn_tns = cx_Oracle.makedsn(ip, port, SID)
# dsn_tns = cx_Oracle.makedsn(ip, port, service_name=SID)
db = cx_Oracle.connect('uid', 'passwd', dsn_tns)
cursor = db.cursor()
-------------------------------------------------
# 2nd attempt
conn = "uid/passwd#(DESCRIPTION=(SOURCE_ROUTE=OFF)(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.0.5)(PORT=1521)))(CONNECT_DATA=(SID=WSVC)(SRVR=DEDICATED)))"
db = cx_Oracle.connect(conn)
cursor = db.cursor()
------------------------------------------------------
# ERROR Description
cx_Oracle.InterfaceError: Unable to acquire Oracle environment handle
The error "unable to acquire Oracle environment handle" is due to your Oracle configuration being incorrect. A few things that should help you uncover the source of the problem:
when using Instant Client, do NOT set the environment variable ORACLE_HOME; that should only be set when using a full Oracle Client or Oracle Database installation
the value of LD_LIBRARY_PATH should contain the path which contains libclntsh.so; the value you selected looks like it is incorrect and should be /usr/lib/oracle/12.2/client64/lib instead
you can verify which Oracle Client libraries are being loaded by using the ldd command as in ldd cx_Oracle.cpython-35m-x86_64-linux-gnu.so
I am attempting to get a connection to the hive server and keep getting:
HiveAccessControlException Permission denied: user [hue] does not have [CREATE] privilege on [default/testHiveDriverTable]
Not sure what username/password combination I should use.
I have Hortonworks running on a virtual machine. The code I am attempting to use to connect to the Hive server is:
Connection con = DriverManager.getConnection(“jdbc:hive2://192.168.0.6:10000/default”, “hue”, “”);
I have also tried connecting via the "root", "Hadoop" username, password configuration.
By the look of the error message, the Connection is OK, but you lack privileges to execute the Statement just below... because that "testHiveDriverTable" label smells like you did a copy/paste on some dummy code example such as:
Connection con = DriverManager.getConnection("jdbc:hive://10.0.2.15:10000/default", "", "");
Statement stmt = con.createStatement();
String tableName = "testHiveDriverTable";
stmt.executeQuery("drop table " + tableName);
stmt.executeQuery("create table " + tableName + " (key int, value string)");
The "no [CREATE] privilege on [default/testHiveDriverTable]" message is a good fit for a create table testHiveDriverTable attempt in database default.
Bottom line: congratulations, you actually could connect to Hive. Now you can work on how to configure the "default" database so that you can actually create tables :-)
Have you tried connecting without giving username and password? I have the following connection string on my cloudera virtualbox which works
Connection con = DriverManager.getconnection(jdbc:hive2://localhost:10000/default,"","");
Here default is the DB name.
Trying to migrate to PDO for an ODBC connection to a remote database.
My system is Windows 7 Pro, with a FortiClient VPN connection to the remote domain, and Tunnel Mode connected. (Added in edit: Running PHP 5.4, so PDO should be installed by default.)
The data source configuration in the Windows 7 ODBC Data Source Administrator is as follows (some names changed for security):
Under System DSN:
System Data Source Name = 'TheBigDB'
Driver = 'Oracle in instantclient_11_2' (64-bit)
TNS Service Name = '10.10.1.20:1521/BIGDB'
UserID = 'BigDBUser'
All other settings are defaults for installation of driver
The following piece of PHP non-PDO code is able to create a connection usable for queries:
if (!($myConn = odbc_connect('TheBigDB','BigDBUser','myPwd'))) {
echo "No ODBC connection<br />";
}
So I can connect to the database. The problem is doing it in PDO. The following PHP...
try {
$odbcConn = new PDO('odbc:Driver={Oracle in instantclient_11_2};Server=10.10.1.20:1521;Database=BIGDB;Uid=BigDBUser;Pwd=myPwd');
} catch (PDOException $e) {
echo 'PDO connection failed: ' . $e->getMessage();
}
... results in a PDO connection failed: could not find driver message. My first try relied more heavily on the Data Sources Administrator; that looked like this:
try {
$odbcConn = new PDO('MyBigDB','BigDBUser','myPwd');
} catch (PDOException $e) {
echo 'PDO connection failed: ' . $e->getMessage();
}
Same thing -- could not find driver.
So here's my question: Given a Windows 7 system with ODBC through a VPN connection to an Oracle database that all seems to work without PDO, how do I migrate the connection parameters to create a PDO connection? Maybe a better question is why mess with PDO for the connection, but I keep reading that PDO is more secure, so I'm trying to use it.
More digging got me an answer. The correct syntax for creating a PDO object that uses a Windows Data Sources ODCB connection is not what I showed, but instead this (minus the try/catch):
$myConn = new PDO('odbc:TheBigDB','BigDBUser','myPwd');
BUT... with PHP 5.4.12 using ODBC to touch an Oracle 11 DB, you need to edit the correct php.ini file (see this WampServer forum topic for a discussion of which of three php.ini files you need to edit). Under Dynamic Extensions, uncomment extension=php_pdo_odbc.dll and extension=php_pdo_oci.dll (I did both; not sure which one did the trick...)
Another tip: In my scripts, neither odbc_connect() nor PDO() worked for me unless my connection was created in Windows Data Sources Administrator under the System DSN tab. It did not work under User DSN.
I am stuck with connecting to Oracle DB, have read lots of stuff but no help on result.
I have remote Oracle DB, I am connecting to it using DBVisualizer setting connection like this:
DB Type : Oracle
Driver (jdbc) : Oracle thin
Database URL: jdbc:oracle:thin:#10.10.100.10:1521/VVV.LOCALDOMAIN
UserIdf: SomeUser
Pass: SomePass
Connection works ok.
What I do in Ruby is :
require 'oci8'
require 'dbi'
...
conn = OCI8.new('SomeUser','SomePass','//10.10.100.10:1521/VVV.LOCALDOMAIN')
...
What I get is:
ORA-12545: Connect failed because target host or object does not exist
oci8.c:360:in oci8lib.so
the third parameter needs to be the TNS hostname, if you use SQL plus it is also the third parameter in the connectstring, you can find it also in the tnsnames.ora file in the oracle maps
in SQLPlus : connect user/password#hostname;
in oci8 : conn = OCI8.new('SomeUser','SomePass',hostname)
Here a working sample, obfuscated the parameters of course
require 'oci8'
oci = OCI8.new('****','***','****.***')
oci.exec('select * from table') do |record|
puts record.join(',')
end