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Date: Mon, 25 Feb 2019 11:54:39 -0500
From: gilberto.castillo@etecsa.cu
To: Pepe TD Vo <pepevo@yahoo.com>
Cc: Pgsql-admin <pgsql-admin@postgresql.org>
Subject: Re: [MASSMAIL]pg_dumpall: could not connect to database: FATAL
In-Reply-To: <1323549085.4899214.1551113430643@mail.yahoo.com>
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 <1323549085.4899214.1551113430643@mail.yahoo.com>
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Hi Pepe,

Is there a user postgres in your database?

Do you changer backup user?


El 2019-02-25 11:50, Pepe TD Vo escribió:
> good morning Expert DBAs,
> 
> I created a script to do backup and I have faced the error of
> 
>> Performing globals backup:
>> pg_dumpall: could not connect to database "template1":FATAL: Ident
>> authentication failed for user "postgres" fro globals backup.  As
>> same as performing schema-only backups and full backup.
>> 
>> Performing schema-only backup:
>> psql:FATAL: Ident authentication failed for user "postgres"
>> the following databases were matched for schema-only backup:
>> 
>> performing full backup:
>> psql:FATAL: Ident authentication failed for user "postgres"
> 
> I can run pg_dumpall > postgresdump.sql as postgres user os but
> couldn't run from script even the script declared BACKUP_USER=postgres
> 
> If I take the syntax, -H "$HOSTNAME" -U "$USERNAME" out and the backup
> script working fine
> 
> # VI PG_BACKUP.CONFIG
> 
> ##############################
> ## POSTGRESQL BACKUP CONFIG ##
> ##############################
> 
> # Optional system user to run backups as.  If the user the script is
> running as doesn't match this
> # the script terminates.  Leave blank to skip check.
> BACKUP_USER=
> 
> # Optional hostname to adhere to pg_hba policies.  Will default to
> "localhost" if none specified.
> HOSTNAME="hostname"
> 
> # Optional username to connect to database as.  Will default to
> "postgres" if none specified.
> USERNAME="postgres"
> 
> # This dir will be created if it doesn't exist.  This must be writable
> by the user the script is
> # running as.
> BACKUP_DIR=/home/backups/database/postgresql/
> 
> # List of strings to match against in database name, separated by
> space or comma, for which we only
> # wish to keep a backup of the schema, not the data. Any database
> names which contain any of these
> # values will be considered candidates. (e.g. "system_log" will match
> "dev_system_log_2010-01")
> SCHEMA_ONLY_LIST=""
> 
> # Will produce a custom-format backup if set to "yes"
> ENABLE_CUSTOM_BACKUPS=yes
> 
> # Will produce a gzipped plain-format backup if set to "yes"
> ENABLE_PLAIN_BACKUPS=yes
> 
> # Will produce gzipped sql file containing the cluster globals, like
> users and passwords, if set to "yes"
> ENABLE_GLOBALS_BACKUPS=yes
> 
> #### SETTINGS FOR ROTATED BACKUPS ####
> 
> # Which day to take the weekly backup from (1-7 = Monday-Sunday)
> DAY_OF_WEEK_TO_KEEP=5
> 
> # Number of days to keep daily backups
> DAYS_TO_KEEP=7
> 
> # How many weeks to keep weekly backups
> WEEKS_TO_KEEP=5
> 
> ######################################
> 
> #VI PG_BACKUP.SH
> 
> #!/bin/bash
> 
> ###########################
> ####### LOAD CONFIG #######
> ###########################
> 
> while [ $# -gt 0 ]; do
>         case $1 in
>                 -c)
>                         if [ -r "$2" ]; then
>                                 source "$2"
>                                 shift 2
>                         else
>                                 ${ECHO} "Unreadable config file
> \"$2\"" 1>&2
>                                 exit 1
>                         fi
>                         ;;
>                 *)
>                         ${ECHO} "Unknown Option \"$1\"" 1>&2
>                         exit 2
>                         ;;
>         esac
> done
> 
> if [ $# = 0 ]; then
>         SCRIPTPATH=$(cd ${0%/*} && pwd -P)
>         source $SCRIPTPATH/pg_backup.config
> fi;
> 
> ###########################
> #### PRE-BACKUP CHECKS ####
> ###########################
> 
> # Make sure we're running as the required backup user
> if [ "$BACKUP_USER" != "" -a "$(id -un)" != "$BACKUP_USER" ]; then
>     echo "This script must be run as $BACKUP_USER. Exiting." 1>&2
>     exit 1;
> fi;
> 
> ###########################
> ### INITIALISE DEFAULTS ###
> ###########################
> 
> if [ ! $HOSTNAME ]; then
>     HOSTNAME="localhost"
> fi;
> 
> if [ ! $USERNAME ]; then
>     USERNAME="postgres"
> fi;
> 
> ###########################
> #### START THE BACKUPS ####
> ###########################
> 
> FINAL_BACKUP_DIR=$BACKUP_DIR"`date +\%Y-\%m-\%d`/"
> 
> echo "Making backup directory in $FINAL_BACKUP_DIR"
> 
> if ! mkdir -p $FINAL_BACKUP_DIR; then
>     echo "Cannot create backup directory in $FINAL_BACKUP_DIR. Go and
> fix it!" 1>&2
>     exit 1;
> fi;
> 
> #######################
> ### GLOBALS BACKUPS ###
> #######################
> 
> echo -e "\n\nPerforming globals backup"
> echo -e "--------------------------------------------\n"
> 
> if [ $ENABLE_GLOBALS_BACKUPS = "yes" ]
> then
>         echo "Globals backup"
> 
>         if ! pg_dumpall -g -h "$HOSTNAME" -U "$USERNAME" | gzip >
> $FINAL_BACKUP_DIR"globals".sql.gz.in_progress; then
>                 echo "[!!ERROR!!] Failed to produce globals backup"
> 1>&2
>         else
>                 mv $FINAL_BACKUP_DIR"globals".sql.gz.in_progress
> $FINAL_BACKUP_DIR"globals".sql.gz
>         fi
> else
>     echo "None"
> fi
> 
> ###########################
> ### SCHEMA-ONLY BACKUPS ###
> ###########################
> 
> for SCHEMA_ONLY_DB in ${SCHEMA_ONLY_LIST//,/ }
> do
>     SCHEMA_ONLY_CLAUSE="$SCHEMA_ONLY_CLAUSE or datname ~
> '$SCHEMA_ONLY_DB'"
> done
> 
> SCHEMA_ONLY_QUERY="select datname from pg_database where false
> $SCHEMA_ONLY_CLAUSE order by datname;"
> 
> echo -e "\n\nPerforming schema-only backups"
> echo -e "--------------------------------------------\n"
> 
> SCHEMA_ONLY_DB_LIST=`psql -h "$HOSTNAME" -U "$USERNAME" -At -c
> "$SCHEMA_ONLY_QUERY" postgres`
> 
> echo -e "The following databases were matched for schema-only
> backup:\n${SCHEMA_ONLY_DB_LIST}\n"
> 
> for DATABASE in $SCHEMA_ONLY_DB_LIST
> do
>     echo "Schema-only backup of $DATABASE"
> 
>     if ! pg_dump -Fp -s -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" |
> gzip > $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz.in_progress; then
>         echo "[!!ERROR!!] Failed to backup database schema of
> $DATABASE" 1>&2
>     else
>         mv $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz.in_progress
> $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz
>     fi
> done
> 
> ###########################
> ###### FULL BACKUPS #######
> ###########################
> 
> for SCHEMA_ONLY_DB in ${SCHEMA_ONLY_LIST//,/ }
> do
>     EXCLUDE_SCHEMA_ONLY_CLAUSE="$EXCLUDE_SCHEMA_ONLY_CLAUSE and
> datname !~ '$SCHEMA_ONLY_DB'"
> done
> 
> FULL_BACKUP_QUERY="select datname from pg_database where not
> datistemplate and datallowconn $EXCLUDE_SCHEMA_ONLY_CLAUSE order by
> datname;"
> 
> echo -e "\n\nPerforming full backups"
> echo -e "--------------------------------------------\n"
> 
> for DATABASE in `psql -h "$HOSTNAME" -U "$USERNAME" -At -c
> "$FULL_BACKUP_QUERY" postgres`
> do
>     if [ $ENABLE_PLAIN_BACKUPS = "yes" ]
>     then
>         echo "Plain backup of $DATABASE"
> 
>         if ! pg_dump -Fp -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" |
> gzip > $FINAL_BACKUP_DIR"$DATABASE".sql.gz.in_progress; then
>             echo "[!!ERROR!!] Failed to produce plain backup database
> $DATABASE" 1>&2
>         else
>             mv $FINAL_BACKUP_DIR"$DATABASE".sql.gz.in_progress
> $FINAL_BACKUP_DIR"$DATABASE".sql.gz
>         fi
>     fi
> 
>     if [ $ENABLE_CUSTOM_BACKUPS = "yes" ]
>     then
>         echo "Custom backup of $DATABASE"
> 
>         if ! pg_dump -Fc -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" -f
> $FINAL_BACKUP_DIR"$DATABASE".custom.in_progress; then
>             echo "[!!ERROR!!] Failed to produce custom backup database
> $DATABASE" 1>&2
>         else
>             mv $FINAL_BACKUP_DIR"$DATABASE".custom.in_progress
> $FINAL_BACKUP_DIR"$DATABASE".custom
>         fi
>     fi
> 
> done
> 
> echo -e "\nAll database backups complete!"
> 
> I'm appreciate if anyone know how to correct this?
> 
> thank you.
> 
> v/r,
> 
> Bach-Nga
> 
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> their mistakes you will be alone. So judge less, love and forgive
> more.
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