Psql: FATAL: Peer authentication failed for user "postgres" Resolution Error Message psql: FATAL: Peer authentication failed for user "postgres" Cause ~]# psql -U postgres Verify that the PostgreSQL service is running using operating system tools (ps, netstat, ss, systemctl) or check for the presence of postmaster.pid in the data directory. Is the server running locally and acceptingĬonnections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"? Resolution Psql: could not connect to server: No such file or directory What follows is a non exhaustive list: Error Message psql: could not connect to server: No such file or directory Cause ~]# psql -U postgres setting the logging level to LOG, will instruct PostgreSQL to also log FATAL and PANIC messages. ![]() Note: Higher level messages include messages from lower levels i.e. INFO: Logs explicitly requested by clients.NOTICE: Information that clients can use to improve their code.Monitoring for warnings is a good practice in early detection of issues on both the server and application side. WARNING: An event that, while not preventing the command to complete, may lead to failures if not addressed.Other databases in the cluster are not affected. FATAL: The current session is aborted due to an error.This is a critical situation that affects all clients. PANIC: All database sessions are aborted.PostgreSQL can be configured to log at the following severity levels: Logging to server log files is controlled by the parameter log_min_messages, while log_min_error_statement enables logging of SQL statements that cause an error of a specific severity level. When returning error messages to clients, and therefore logging to error log, messages are logged with a severity level that is controlled using the client_min_messages parameter. ![]() Jan 24 19:10:04 systemd: rvice: Failed with result 'exit-code'. Jan 24 19:10:04 systemd: rvice: Unit entered failed state. Jan 24 19:10:04 systemd: Failed to start PostgreSQL database server. Jan 24 19:10:04 systemd: rvice: Control process exited, code=exited status=1 Jan 24 19:10:04 postgresql-check-db-dir: See /usr/share/doc/postgresql/README.rpm-dist for more information. Jan 24 19:10:04 postgresql-check-db-dir: to initialize the database cluster. Jan 24 19:10:04 postgresql-check-db-dir: Use "/usr/bin/postgresql-setup -initdb" Jan 24 19:10:04 postgresql-check-db-dir: Directory "/var/lib/pgsql/data" is missing or empty. Jan 24 19:10:04 systemd: Starting PostgreSQL database server. Process: 1945 ExecStartPre=/usr/libexec/postgresql-check-db-dir postgresql (code=exited, status=1/FAILURE) Loaded: loaded (/usr/lib/systemd/system/rvice disabled vendor preset: disabled)Īctive: failed (Result: exit-code) since Wed 19:10:04 PST 8s ago ![]() See "systemctl status rvice" and "journalctl -xe" for ~]# systemctl status postgresql Job for rvice failed because the control process exited with error code. For example, when attempting to start the service following the package installation: ~]# systemctl start postgresql When the logging collector has not been initialized, errors are logged to the system log. ![]() When reviewing the list of classes, note that success and warning are also logged by PostgreSQL to the error log - that is because logging_collector, the PostgreSQL process responsible for logging, sends all messages to stderr by default. When reporting errors, PostgreSQL will also return an SQLSTATE error code, therefore errors are classified into several classes. There are other fine details, explained in the guide, such as the use of past or present tense to indicate if the error is temporary or permanent. Error messages normally contain a short description, followed by some detailed information, and a hint, if applicable, suggesting the solution. PostgreSQL error reporting follows a style guide aimed at providing the database administrator with the information required to efficiently troubleshoot issues.
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