I am using Ubuntu server. I am trying to install postgresql on it. when I try to start postgres using
sudo service postgresql start
it result me into
*No PostgreSQL clusters exist; see "man pg_createcluster"
and when I try to create cluster using command pg_createcluster --start 9.6 main (*9.6 is my postgres version)
The result is as follows
Creating new PostgreSQL cluster 9.6/main ...
/usr/lib/postgresql/9.6/bin/initdb -D /var/lib/postgresql/9.6/main --
auth-local peer --auth-host md5
initdb: could not look up effective user ID 108: Permission denied
Error: initdb failed
I am not able to figure out what is the issue please help.
It looks like your /etc/passwd is not readable. I'm not sure which distro would require it, but it is a problem for initdb.
I believe fast solution would be running as root chmod 644 /etc/passwd
And follow with
/usr/lib/postgresql/9.6/bin/pg_ctl -D /usr/local/pgsql/data -l logfile start
command
Related
I installed postres using pacman on Manjaro.
When I do:
su postgres
postgres -D ~/data >~/logs/log
I get
FATAL: could not create lock file "/run/postgresql/.s.PGSQL.5432.lock": No such file or directory
And so, every time I boot up I have to
sudo su
mkdir /run/posgresql
chown postgres:postgres /run/posgresql
I tried creating /etc/systemd/system/postgresql.service as described in https://www.postgresql.org/docs/10/server-start.html, but the service doesn't run on startup?
Why isn't the folder persisting after reboot? Is there a better way of starting up postgres? What am I missing?
Using the "service" approach is the proper way. It will ensure the creation of the lockfile for you. If you want it to autostart, you need to run the enable command on your service.
systemctl enable postgresql
I have installed Postgres 12 on Ubuntu by building it from source and I am facing two issues:
Although I followed the installation manual from Postgrez, every time I restart my computer, my Postgres server stopz and is no longer seen as a running process.
To start it the first time after install, I do this from the terminal:
/usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data
/usr/local/pgsql/bin/pg_ctl -D /usr/local/pgsql/data -l logfile start
After a restart, to start DB again when I run: /usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data, it throws this error:
initdb: error: directory "/usr/local/pgsql/data" exists but is not empty
If you want to create a new database system, either remove or empty
the directory "/usr/local/pgsql/data" or run initdb
with an argument other than "/usr/local/pgsql/data".
Does that mean that every time I start Postgres after a restart, I have to create a new /data directory?
Upon installing Postgres sing pip or pip3, one can just switch user to postgres and run psql to enter postgres, however now I have to run "/usr/local/bin/psql". Please note I have exported all the paths per https://www.postgresql.org/docs/12/installation.html. How can I fix this? Can an alias be set for this?
After a restart, to start DB again when I run:
/usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data, it throws this
error:
Does that mean that every
time I start Postgres after a restart, I have to create a new /data
directory?
No, quite the opposite. You don't need to initdb after the first time, you just need to start. It is your attempt to initdb when you don't need to which is causing the error message. Note that attempting to initdb isn't doing any harm, because it refused to run. It just generates log/console noise.
Upon installing Postgres sing pip or pip3, one can just switch user to
postgres and run psql to enter postgres, however now I have to run
"/usr/local/bin/psql". Please note I have exported all the paths per
https://www.postgresql.org/docs/12/installation.html. How can I fix
this?
I don't know what your first sentence means, as you don't use pip or pip3 to install PostgreSQL (or at least, the docs don't describe doing so) although you might use them to install psycopg2 to enable python to talk to PostgreSQL.
You could use an alias, but it would probably make more sense to edit ~/.bash_profile to set the PATH, as described from the page you linked to under Environment Variables.
You have to register postgreSQL as a service.
run this:
pg_ctl register [-N servicename] [-U username] [-P password] [-D datadir] [-S a[uto] | d[emand] ] [-w] [-t seconds] [-s] [-o options]
Example:
pg_ctl register -N postgresql -U OS_username -P OS_password -D '/etc/postgresql/12/data' -w
More info in the manual: pg_ctl
Notes:
Username and Password is related to the OS, not postgresql
If you have doubts read the manual.
/usr/local/pgsql/bin/pg_ctl start -D '/usr/local/pgsql/data'
Export following in postgres user account's ~/.bashrc:
LD_LIBRARY_PATH=/usr/local/pgsql/lib
export LD_LIBRARY_PATH
PATH=/usr/local/pgsql/bin:$PATH
export PATH
I am quite new in Arch and a total beginner in PostgreSQL, so this may be a very basic question.
I installed postgresql 11.5-4 from extra and pgadmin 4 from AUR, both seem to be running well.
I created a test DB with the following command:
initdb -D /home/lg/test-db
I got the answer:
You can start the db-server using:
pg_ctl -D /home/lg/test-db -l logdatei start
I tried that and got:
pg_ctl -D /home/lg/test-db -l logdatei start
waiting for serer to start.... stopped
pg_ctl: could not start the server
check the log.
The log only says that the lockfile »/run/postgresql/.s.PGSQL.5432.lock« could not be created, because the folder could not be found. Under /run is no folder called "postgresql". I suppose postgresql can not create this folder, because it does not have the permission. Several posts online posts suggest to change the user/owner of the db to sudo, however. Postgresql prevents this, however. When I try any command as sudo, postgresql tells me that this command can't be run as root. There must be some very basic error in my thinking here, but I have not worked it out for 3 hours.
You'll have to remove /run/postgresql from unix_socket_directories in postgresql.conf before starting the server.
Probably You have /var/run symlinked to /run and run is on tmpfs. You should add something like d /run/postgresql 0755 postgres postgres - into /usr/lib/tmpfiles.d/postgresql.conf
I was following these steps to install postgresql and then odoo v9 :
https://www.odoo.com/documentation/9.0/setup/install.html
Basically it follows these steps outlined here:
https://www.odoo.com/forum/help-1/question/issue-while-installing-following-the-instructions-for-packaged-installers-rpm-93756
I get exactly the same situation. The first steps go through without issue but then the postgresql-setup initdb command cannot be found.
I have root access to the server and I know it's running centOS5.5. How can I troubleshoot this? I believe I installed the 9.4 version but when I do psql -V I get the server has v8.3.
I ran some commands on the server and here are the results:
postgresql-setup initdb
command cannot be found
postgres
root execution is not permitted, server must be restarted as underprivileged id...
initdb
no data directory specified, you must identify dir where datase system will reside
locate postgresql
i get an .rb, .xml and .yml files
locate psql
/usr/lib64 - a few libodbcpsql.so files
pqsl -V
8.1.23
I get command not found for all other commands in the list of commands to install odoo up until sudo yum config manager --add-repo etc...
sudo su postgres -c "psql -c 'show data_directory'"
could not change directory to 'the directory im currently in on my server'
I find I have the wreckage of two old PostgreSQL installations on Ubuntu 10.04:
$ pg_lsclustersVersion Cluster Port Status Owner Data directory Log file
Use of uninitialized value in printf at /usr/bin/pg_lsclusters line 38.
8.4 main 5432 down /var/lib/postgresql/8.4/main /var/log/postgresql/postgresql-8.4-main.log
Use of uninitialized value in printf at /usr/bin/pg_lsclusters line 38.
9.1 main 5433 down /var/lib/postgresql/9.1/main /var/log/postgresql/postgresql-9.1-main.log
$
Attempts to perform basic functions return errors, for instance:
createuser: could not connect to database postgres: 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"?
More information comes when I try to start the database server:
$ sudo /etc/init.d/postgresql start
* Starting PostgreSQL 9.1 database server
* Error: The cluster is owned by user id 109 which does not exist any more
...fail!
$
My question: how do I completely remove both clusters and set up a new one? I've tried removing, purging, and reinstalling postgresql, following the advice here: https://stackoverflow.com/a/2748644/621762. Now pg_lsclusters shows no clusters in existence, but the No such file or directory error persists when I try to createuser, createdb or run psql. What have I failed to do?
First, that answer you linked to was pretty unsafe - hand-editing /etc/passwd ?!? dselect where an apt wildcard would do? Crazy stuff. I'm not surprised you're having issues.
As for the no such file or directory messages: You need to make sure you have a running PostgreSQL server ("cluster") before you can use admin commands like createdb, because they make a connection to the server. The No such file or directory message is telling you that the server doesn't exist or isn't running.
Here's what's happening:
Ubuntu uses pg_wrapper to manage multiple concurrent PostgreSQL instances. The issues you're having are really with pg_wrapper.
Ideally you would've just used pg_dropcluster to get rid of the unwanted clusters. Unfortunately, by following bad advice it sounds like you've got your system into a bit of a messed-up state where the PostgreSQL packages are half-installed and kind of mangled. You need to either repair the install, or totally clean it out.
I'd clean it out. I'd recommend:
Verify that pg_lsclusters lists no database clusters
apt-get --purge remove postgresql\* - this is important
Remove /etc/postgresql/
Remove /etc/postgresql-common
Remove /var/lib/postgresql
userdel -r postgres
groupdel postgres
apt-get install postgresql-common postgresql-9.1 postgresql-contrib-9.1 postgresql-doc-9.1
It's possible that the apt-get --purge step will fail because you've removed the user IDs, etc. Re-creating the postgres user ID with useradd -r -u 109 postgres should allow you to re-run the purge successfully then delete the user afterwards.
This answer is not directly about removing a postgres instance, rather, about resoliving the issue,
Error: The cluster is owned by user ...
I got this error while trying to spin up a docker container pointed to a postgres data directory that was produced via a different container (on a different host machine).
The error is directly related to directory ownership. In my case, the system was unable to find the user that certain postgres directories was owned by in the current environment. By re-owning those directories to the right user resolves the issue. Following is an example mapping (that worked for me):
chown -R postgres:postgres /var/lib/postgresql
chown -R postgres:postgres /etc/postgresql
chown -R postgres:postgres /var/log/postgresql
chown -R postgres:postgres /var/run/postgresql