I have a running postgresql server on amazone ec2. I connect with pgAdmin3 to it over ssh tunnel directly configured in pgAdmin3 from my mac.
I can make queries and see the full schema, no problem about that.
If I try to make a backup of the database (from pgAdmin3 GUI) then I get (even if the connection is actually open and working) the following exception:
/Applications/pgAdmin3.app/Contents/SharedSupport/pg_dump --host localhost --port 5432 --username "MY_USERNAME" --role "MY_ROLE" --no-password --format custom --encoding UTF8 --verbose --file "/Users/XXX/filename" "DATABASENAME"
pg_dump: [archiver (db)] connection to database "DATABASENAME" failed: could not connect to server: Connection refused
Is the server running on host "localhost" (::1) and accepting
TCP/IP connections on port 5432?
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?
Process ended with Exitcode 1.
Any idea why pg_dump in the background can not connect over the ssh tunnel?
alternative until i found a solution is to make it by terminal
ssh <HOST> "pg_dump -U <USERNAME> -W -h localhost -F c <DATABASENAME> | gzip -c" > ./backup.sql.gz
This line worked for me:
ssh -o "Compression=no" server_adress "pg_dump -Z9 -Fc -U postgres db_name" > backup_name.dump
Related
I installed and started my Postgres database with brew (on my Mac). I also defined an entry in my /etc/hosts file (I tried both with 127.0.0.1 postgres and with postgres).
However, when I try
psql -h postgres -U postgres -p 5432
I cannot connect
psql: could not connect to server: Connection refused.
However, when I try with
psql -h localhost -U postgres -p 5432
I can connect. What is needed to be able to connect with: psql -h postgres -U postgres -p 5432
Make sure your PostgreSQL server is willing to accept tcp/ip connections on port 5432.
In your PostgreSQL configuration file check these values.
listen_addresses = '*'
port = 5432
all. I have a new Ubuntu 17.04 server setup. I can access it through ssh successfully. Also, I have a postgresql database installed. It is already configured to accept remote connections through the following configurations:
pg_hba.conf
host all all 0.0.0.0/0 md5
postgresql.conf
listen_addresses = '*'
But when I try to access the database from my computer, I get the following error:
psql -h [SERVER_IP] -d db_production -U dbuser
psql: SSL error: unknown protocol
expected authentication request from server, but received S
I also have a docker container running inside the server. If I access it through /bin/bash and also try to connect with the server db, I get this error:
psql -h [SERVER_IP] -d db_production -U dbuser
psql: could not connect to server: Connection refused
Is the server running on host "[SERVER_IP]" and accepting
TCP/IP connections on port 5432?
The port 5432 is opened and the firewall is disabled. Does anybody have gone through that?
First, do you use the local server host when you're connected into the docker? The server IP, in that case, should be localhost or 127.0.0.1.
Try to use the complete DB URL:
psql postgres://dbuser:dbPass#SERVER_IP:5432/dbname?sslmode=prefer
I'm trying to migrate data from old server to new server, both of them used ubuntu server.
I have used this command:
pg_dump -C -h localhost -U localuser dbname | psql -h remotehost -U remoteuser dbname
but it throw:
psql: could not connect to server: Connection timed out
Is the server running on host "X.X.X.X" and accepting
TCP/IP connections on port 5432?
I have checked postgresql conf on new server, running on 5432, listen..="*"
Anything wrong?
Thanks all !
I want to remotely connect to a Postgres instance. I know we can do this using the psql command passing the hostname
I tried the following:
psql -U postgres -p 5432 -h hostname
I modified the /etc/postgresql/9.3/main/pg_hba.conf file on the target machine to allow remote connections by default
I added the following line to the file
host all all source_ip/32 trust
I restarted the cluster using
pg_ctlcluster 9.2 mycluster stop
pg_ctlcluster 9.2 mycluster start
However, when I try to connect from the source_ip, I still get the error
Is the server running on host "" and accepting TCP/IP connections on port 5432?
What am I doing wrong here?
I resolved this issue using below options:
Whitelist your DB host from your network team to make sure you have access to remote host
Install postgreSQL version 4 or above
Run below command:
psql -h <REMOTE HOST> -p <REMOTE PORT> -U <DB_USER> <DB_NAME>
psql -h <IP_Address> -p <port_no> -d <database_name> -U <DB_username> -W
-W option will prompt for password. For example:
psql -h 192.168.1.50 -p 5432 -d testdb -U testuser -W
I figured it out.
Had to set listen_addresses='*' in postgresql.conf to allow for incoming connections from any ip / all ip
Step Wise below
Opening the Port - Make sure the PSQL Port is open to all remote connections or connections from a specific set of IPs as per your requirement. PSQL, in general, runs at port 5432, and it is configurable, so expose relevant Port accordingly.
Update Remote Server PSQL Configuration - Set listen_addresses = '*' in postgresql.conf file, path in general is /etc/postgresql/psql_version/main/postgresql.conf
Connect remotely - psql -U <db_username> -h <IP_address> - in case psql is running on a port other than 5432 on the remote server, specify port by adding -p <port_number>
A little plus below -
In case the IP has been mapped to a domain name, you can connect by replacing <IP_address> with <host_name>. To do this, add a new connection rule in pg_hba.conf file
Note -
All above explained can cause security issues - best practice always is to either keep your psql port closed, or only allow a list of IPs to connect through the port.
Note that "ident" in pg_hba.conf requires a "ident server" to be running on the client.
Hi can anyone help me dump from a postgreSQL database on a remote AWS server to a postgreSQL database on my local machine.
I've been trying to do it using the answer in this stack post but it keeps failing.
The command I'm using is
pg_dump -C -h ssh ubuntu#ec2-59-16-143-85.eu-west-1.compute.amazonaws.com -U dev_user paycloud_dev | psql -h localhost -U dev_user paycloud_dev
But I keep getting the error
pg_dump: too many command-line arguments (first is "paycloud_dev")
Can't figure out what I'm doing wrong
Just to add, dev_user is the role I've set up in postgreSQL on both the local machine and remote server. paycloud_dev is the name of the database on both (owner is dev_user)
Edit 1
Tried the command below as per a post that has since been deleted for some reason
pg_dump -C -h ec2-59-16-143-85.eu-west-1.compute.amazonaws.com -U dev_user paycloud_dev | psql -h localhost -U dev_user paycloud_dev
This is now giving me the error
pg_dump: [archiver (db)] connection to database "paycloud_dev" failed: could not connect to server: Connection refused
Is the server running on host "ec2-59-16-143-85.eu-west-1.compute.amazonaws.com" (59.16.143.85) and accepting
TCP/IP connections on port 5432?
I went on to AWS and noted that is the elastic ip of the server. I then tried the following (the private IP address)
pg_dump -C -h 170.30.43.35 -U dev_user paycloud_dev | psql -h localhost -U dev_user paycloud_dev
This asks me for the password for paycloud_dev and when I enter it pauses for a good 2 or 3 minutes and comes back with:
pg_dump: [archiver (db)] connection to database "paycloud_dev" failed: could not connect to server: Connection refused
Is the server running on host "170.30.43.35" and accepting
TCP/IP connections on port 5432?
I've tried editing the AWS security group to add a rule that accepts all traffic (port range 0-65535) but the same error is occurring.
Edit 2
Tried the following as per post by pokoli
ssh ubuntu#ec2-59-16-143-85.eu-west-1.compute.amazonaws.com pg_dump -C -h -U dev_user paycloud_dev | psql -U dev_user paycloud_dev
It's not working though. It first asks me for the psql password for my laptop then before I can input anything, it gives an error.
[sudo] password for alzer: pg_dump: too many command-line arguments (first is "paycloud_dev")
Try "pg_dump --help" for more information.
Anyone?
You have to connect with ssh to remote host, execute the dump and pipe it to your local machine. The following command should do:
ssh ubuntu#ec2-59-16-143-85.eu-west-1.compute.amazonaws.com -C pg_dump -U dev_user paycloud_dev | psql -U dev_user paycloud_dev
The command will ask for password of both users if needed and the playcloud_dev database should exists on localhost, otherwise the dump will fail.
Try do this over ssh tunnel.
ssh -fT -L 5432:127.0.0.1:5432 %remote_user_login%#%your_aws_host% sleep 10
pg_dump -C -h localhost -U dev_user paycloud_dev | psql -h localhost -U dev_user paycloud_dev
First line create ssh tunnel and port mapping.
And view your AWS security settings in "Security Groups", may be you forgot opening ports.