postgres falha ao desinstalar

Question

ao tentar desinstalar o postgresql com

sudo apt-get remove postgresql

Recebi a seguinte mensagem de erro

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package 'postgresql' is not installed, so not removed
The following packages were automatically installed and are no longer required:
  account-plugin-windows-live libupstart1
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 17 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up postgresql-common (154ubuntu1) ...
 * Starting PostgreSQL 9.3 database server                                                                                                       * The PostgreSQL server failed to start. Please check the log output:
2015-07-08 11:16:50 PDT FATAL:  could not create lock file "/var/run/postgresql/.s.PGSQL.5432.lock": Permission denied
                                                                                                                                         [fail]
invoke-rc.d: initscript postgresql, action "start" failed.
dpkg: error processing package postgresql-common (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of postgresql-9.3:
 postgresql-9.3 depends on postgresql-common (>= 142~); however:
  Package postgresql-common is not configured yet.

dpkg: error processing package postgresql-9.3 (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                          Errors were encountered while processing:
 postgresql-common
 postgresql-9.3
E: Sub-process /usr/bin/dpkg returned an error code (1)

o mesmo acontece quando tento purgar postgres, o que está acontecendo aqui e como posso remover postgres corretamente?

    

Answer 1

Seu problema

invoke-rc.d: initscript postgresql, action "start" failed.
dpkg: error processing package postgresql-common (--configure):
 subprocess installed post-installation script returned error exit status 1

Minha solução

o caminho curto

sudo rm /etc/init.d/postgresql
sudo rm /etc/init/postgresql.conf
sudo apt-get remove postgresql

ou o Longo caminho

• Abra o arquivo /var/lib/dpkg/info/postgresql-common.postinst

  sudo nano /var/lib/dpkg/info/postgresql-common.postinst
  

• Pesquise a linha com o comando start:

  if [ -x "/etc/init.d/postgresql" ] || [ -e "/etc/init/postgresql.conf" ]; then
          invoke-rc.d postgresql start || exit $?
  fi
  

• comente o bloco

  # if [ -x "/etc/init.d/postgresql" ] || [ -e "/etc/init/postgresql.conf" ]; then
  #        invoke-rc.d postgresql start || exit $?
  # fi
  

• Remova o pacote novamente.

  sudo apt-get remove postgresql
  

Explicação

Durante a remoção do postgresql , o script postgresql-common.postinst é chamado. O script tenta iniciar o serviço postgresql e falhará invoke-rc.d postgresql start (não pergunte por que).

Isso deve ser evitado. Quer alterando as condições pelas quais o código é executado. Ou pela remoção do próprio código.