I've setup a new Linux Subsystem (Ubuntu) on Windows to run Ruby scripts, but the PG gem cannot connect to my PostgreSQL server. It seems like I can connect just fine using psql in the terminal (I think), but not using irb.
Problem:
If I run the following in IRB (within the Linux subsystem shell):
require 'pg'
PG.connect(:dbname=>"postgres")
I get the following error:
PG::ConnectionBad: could not connect to server: No such file or directory
Is the server running locally and accepting connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
However, if I use psql to to select the version(), it returns that just fine:
psql -p 5432 -h localhost -U postgres
postgres=# select version();
Returns:
PostgreSQL 10.1 on x86_64-pc-mingw64, compiled by gcc.exe (Rev5, Built by MSYS2 project) 4.9.2, 64-bit (1 row)
I should mention that I installed Postgres in my Windows environment, and not within the Linux subsystem - however, due to limitations in the subsystem, this seems to be the only way to do it from what I've read online.
I'm not sure if this belongs here or on Superuser or the unix/ubuntu SE, but my basic troubleshooting indicates that this is a problem with Ruby/pg gem, not the subsystem, so I'm posting my question here first.
The default connection is UNIX socket (a quasi-file, as you can see by the error message, /var/run/postgresql/.s.PGSQL.5432), not TCP socket (host:port). Pass your host/port explicitly to PG.connect.
PG.connect(dbname: "postgres", host: 'localhost', port: 5432)
Related
I am trying to connect to a Pervasive Sql Server which is running on Windows machine from my Ruby application which is on Ubuntu Machine. Can Someone please help me on same. Thanks in advance
Below is my configuration on linux machine
/etc/freetds/freetds.conf
[pserver]
host = XXX.XXX.XX.XXX
port = 1583
tds version = 8.0
Under /etc/odbcinst.ini, I have saved the driver info like below
[freetds]
Description=freetds Driver
Driver=/usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so
Setup=/usr/lib/x86_64-linux-gnu/odbc/libtdsS.so
Trace=Yes
TraceFile=/tmp/freetds.log
ForceTrave=Yes
UsageCount=10
fileusage=1
dontdlclose=1
TDS_Version = 8.0
In /etc/odbc.ini, client and database details
[pclient]
Description = Pervasive SQL Server
Driver = freetds
Trace = Yes
Servername = pserver
Port = 1583
Database = "MyDatabasename"
TDS_Version = 8.0
tsql -S pserver -U db_username -P db_password -d MyDatabasename
above cmd gives error saying
Error 20009 (severity 9):
Unable to connect: Adaptive Server is unavailable or does not exist
OS error 111, "Connection refused"
There was a problem connecting to the server
iodbctest ["DSN=pclient;UID=db_username;PWD=db_password"]
this results in
iODBC Demonstration program
This program shows an interactive SQL processor
Driver Manager: 03.52.0812.0326
(iodbctest:6672): Gtk-WARNING **: 20:40:38.693: cannot open display:
Not able to understand the above result and how to handle this. Please help
As far as I know, the only way to access Pervasive PSQL from Ruby would be through ODBC. You need to use the Pervasive Client ODBC driver. Don't use the FreeTDS driver. I've never heard of using the FreeTDS driver to connect to Pervasive PSQL. In fact, this question mentions that FreeTDS doesn't work to Pervasive PSQL. Pervasive PSQL and Microsoft SQL Server are not the same product and the client for one cannot connect to the server of the other.
The short answer would be to install the Pervasive PSQL client on the Ubuntu machine, create the ODBC Datasource name pointing to the database on the Windows machine and then use ODBC from within Ruby to access the data.
You'll want to be on at least Pervasive PSQL v11.30, preferably Actian PSQL v13 (current version as of December 2018). You'll need to download and install the client appropriate for the application. If the Ruby application is 32 bit, you need the 32 bit ODBC driver. If the application is 64 bit, you'll need the 64 bit driver. The 'bitness' of the OS is not as important. You need to use the same PSQL client version as server version. You cannot use the v13 client with a v11 server.
When I try to connect to my postgresql database with psql I receive the error message:
D:\>psql -U postgres
psql: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/tmp/.s.PGSQL.5112"?
A similar error I get when using createdb:
createdb: could not connect to database template1: could not connect to server: No such file or directory
next two lines are identical to the psql error.
I can start pgadminIII without problems and access my databases. when I check the properties of the connection it uses port 5432. When using process explorer I see about 5 postgresql processes, though none accessing port 5432. The solutions I found in this forum are about linux/osx platforms, which I am not able to translate into a windows solution.
Could anybody tell what is wrong/what I am doing wrong and suggest a solution?
Thanks for your time.
WAS 8.5 full profile isn't officially supported on OSX by IBM so the only option to perform development from OSX is to install stub runtime and connect to WAS installed remotely. I'm trying to install such scenario but something done wrong and can't connect to my WAS.
There's my installation:
On OSX El Capitan Installed:
RAD 9.5 with WAS 8.5 stub runtime (WebSphere Application Server traditional V8.5 stub)
Installed Virtual Box with Ubuntu Desktop edition 14.04
Ubuntu's hostname: anatoly-ubuntu-vm and it's accessible from host, i.e. ping anatoly-ubuntu-vm works fine
On Ubuntu installed:
WAS 8.5 full profile at /opt/IBM/WebSphere
Created AppSrv01 profile at /opt/IBM/WebSphere/AppServer/profiles
WAS installed with root user, IBM Installation Manager required root permission when was started
My connection settings in RAD:
server name: WebSphere Application Server traditional V8.5 stub at anatoly-ubuntu-vm
hostname: anatoly-ubuntu-vm
Runtime environment: WebSphere Application Server traditional V8.5 stub
Connection type:
I've tried RMI 2809 and SOAP 8880 both options didn't work
Enable the server to start remotely is checked and Select the operating system running the remote server: checked Linux option with my username and password. I've tried my regular Ubuntu account and root, both option didn't work.
Server profile path defined as /opt/IBM/WebSphere/AppServer/profiles/AppSrv01
When I try to start server I get the following exception:
The following problems has occurred when starting the server.
CTGRI0001E The application could not establish a connection to
anatoly-ubuntu-vm .
What am I doing wrong?
UPDATE 1:
After I've written this post I've figured out that SSH server isn't installed and configured at all as described here: Requirements for using Remote Execution and Access (RXA) Now, I've installed and it seems like connecting but stuck at 23% at stage Preparing launch delegate, after a while it throw the following error:
The following problems has occurred when starting the server. The
server may not be started in the correct mode. You can restart the
server to desired mode if it is started. CTGRI0075E A file transfer to
or from the system named [anatoly-ubuntu-vm] timed out before the
transfer could complete. The current timeout interval is set to 240000
milliseconds, and might need to be increased.
UPDATE 2:
As I can see despite error message server is started and I even can connect to web console anatoly-ubuntu-vm:9060/console/ibm but it looks that not SOAP connection, neither RMI connection don't work. When I run Test Connection from Settings overview page in RAD, I get the following error:
The connection failed after trying to use all the available connection
types.
Verify the port values are correct and the server has been started. If
the security of the server is enabled, verify the "Security is enabled
on this server" check box is selected, and the user ID and password
are provided. You can specify this in the server editor or when
creating a new server.
For a Technote with details on the most common server connection
problem, see http://www.ibm.com/support/docview.wss?uid=swg21266028.
The last connection attempt failed with the following exception:
ADMC0016E: The system cannot create a SOAP connector to connect to
host anatoly-ubuntu-vm at port 8880.
UPDATE 3
As #DanielBarbarian guessed I tried to run ./wsadmin.sh -port 8880 and it worked and returned
Connected to process "server1" on node anatoly-ubuntu-vmNode01 using SOAP connector; The type of process is: UnManagedProcess`
This is settings of my ports:
UPDATE 4
When I trying to run telnet anatoly-ubuntu-vm 8880 from OSX host I get the following response (ip address changed to non real due to privacy issue):
anatoly-mac:~ anatoly$ telnet anatoly-ubuntu-vm 8880
Trying 192.168.10.10...
Connected to anatoly-ubuntu-vm
Escape character is '^]'.
HTTP/1.1 408 Request Timeout
Content-Type: text/html
Content-Length: 117
Connection: close
<HTML><TITLE>408 - Request Timeout</TITLE><BODY>
<h1>408 Connection timed out while reading request</h1></BODY>
</HTML>Connection closed by foreign host
I just updated my mac OS X to Yosemite, version 10.10.4, and postgresql to: psql (PostgreSQL) 9.4.4.
After running rake db:migrate on my Rails 4.2.1 application, my terminal session is responding with:
rake aborted!
PG::ConnectionBad: could not connect to server: Connection refused
Is the server running on host "localhost" (127.0.0.1) and accepting
TCP/IP connections on port 5432?
could not connect to server: Connection refused
Is the server running on host "localhost" (::1) and accepting
TCP/IP connections on port 5432?
Simply entering psql in my terminal session also appears a bit off:
$ psql
psql: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
After printing out the logs from, cat /usr/local/var/postgres/server.log, I read:
DETAIL: The data directory was initialized by PostgreSQL version 9.3, which is not compatible with this version 9.4.4.
LOG: skipping missing configuration file "/usr/local/var/postgres/postgresql.auto.conf"
FATAL: database files are incompatible with server
I found this answer on SO, but I a hesitant to just start creating a bunch of directories unless that's really what I am suppose to do. I also found an older answer but am not too sure if it's the one to follow.
This SO answer suggests that I remove a, /usr/local/var/postgres/postmaster.pid, but I do not have one, I have a, /usr/local/var/postgres/postmaster.opts -- should I remove the postmaster.opts?
There appears to be lots of advice, but I am not too sure what to follow. Can someone offer some advice in getting my postgresql database running on my rails application?
You could upgrade the database by following an official guide:
brew switch postgres 9.3 # presuming you already installed 9.4.4
pg_dumpall > outputfile
launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist
mv /usr/local/var/postgres /usr/local/var/postgres.old
brew switch postgres 9.4.4
initdb -D /usr/local/var/postgres
psql -d postgres -f outputfile
PostgreSQL upgrade
Basically, I had to drop and recreate my own database and re-seed it with remote staging data. What I did not understand is that the problem with updating a database is that the data itself also needs to be 'updated' in a way. The data was compatible with a different version
Currently PostgreSQL 9.2.4 is provided in OSX Mavericks. I have used the provided PostgreSQL since running Lion Server. When I started using it I was using a password that I now realize is not very secure.
I am having trouble finding the right command to do this. The user/role (I supposed) that is provided is _postgres. This is the password I would like to change. I attempted the command below but honestly I'm not sure what it is supposed to do. I thought that this would allow me to access the role/user.
psql -U _postgres -h localhost -W
Here is what happened when I attempted to execute this command.
xxxx:~ xxxx$ psql -U _postgres -h localhost -W
Password for user _postgres:
psql: FATAL: database "_postgres" does not exist
_postgres is the user for all my databases. I would like to change the password for _postgres. I'm not sure since the databases were created by _postgres that once I change that password if the password will work for the databases or if I will have to change the database passwords also.
All the solutions dealing with this reference directories that I do not have in Mavericks. When I used Lion and Mountain Lion I was able to go to the psql directory and find postgresql.conf and pg_hba.conf. I do a search on those files and do not find them.
Sidebar: I currently use PgAdmin3 for basic database maintenance. The Mac version of the software does not have an option for changing passwords that I can find. If there is another GUI software package that is more user friendly for accessing the provided PostgreSQL I would definitely like to try it. Every solution that suggests Homebrew is in the context of installing another version of PostgreSQL which is not what I want to do.
I need the correct terminal command(s) to do this or help on where to go to get the solution that will work with OS X Mavericks. The PostgreSQL documentation is a bit overwhelming and was not clear as to where to go and what to do regarding this.
Any help would be appreciated.
UPDATE 4/5 6:03 pm CDT
Here are the contents in /Library/Server/PostgreSQL/Data/pg_hba.conf
# TYPE DATABASE USER ADDRESS METHOD
# "local" is for Unix domain socket connections only
local all all trust
# IPv4 local connections:
host all all 127.0.0.1/32 trust
# IPv6 local connections:
host all all ::1/128 trust
# Allow replication connections from localhost, by a user with the
# replication privilege.
#local replication _postgres trust
#host replication _postgres 127.0.0.1/32 trust
#host replication _postgres ::1/128 trust