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Postgres se nako inicijalizuje preko systemd-a

Discussion in 'Opšte diskusije' started by Branimir Maksimovic, 06.04.2019.

  1. Branimir Maksimovic

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    Elem imam /var/lib/postgres na zfs-u mountovano sve pet.
    Ali od skora je pocelo da se pravi data dir u njemu negde, ne znam da
    li u shutdown ili boot vreme. Uglavnom u vreme kada je data set umountovan.
    U systemctl list-unit-files nema nista vezano za postgres osim jedinog
    servisa koji startuje koji bazu drzim disabled.
    U zbunu sam sta se i kako desava, pa ako neko zna bio bih zahvalan.
     
  2. webad

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    Da li hoces da kazes da ti je "/var/lib/postgres" u stvari mount, tj da ga drzis na drugom disku?
    PG se vec dugo verzija unazad po default-u skladisti na putanji oblika "/var/lib/{postgres/pgsql}/{version}/data". Ja sam ceo taj data folder drzao na eksternom disku bez problema (bez automatskom mount-ovanja, paljenja pg-a, ..., volim ja to rucno kada je sve u redu). Ogranicavam se da nisam nad-nadfolder drzao na eksternom disku.
    Da li ti je poznato da imas negde automatsko pozivanje pg-ove initdb skripte? Ta skripta je zaduzena za kreiranje data direktorijuma.
    Ne znam da li da nam das spisak svih unit-files koje dobijes pa da mozda tako najurimo.
     
  3. Branimir Maksimovic

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    Da to je mount na drugom disku.
    Problem je sto systemd negde nekako pozove init skriptu, ne znam odakle. Servis je oboren.
    Code:
    UNIT FILE  STATE   
    proc-sys-fs-binfmt_misc.automount  static   
    -.mount  generated   
    dev-hugepages.mount  static   
    dev-mqueue.mount  static   
    etc-pacman.d-gnupg.mount  static   
    home.mount  generated   
    proc-fs-nfsd.mount  static   
    proc-sys-fs-binfmt_misc.mount  static   
    sys-fs-fuse-connections.mount  static   
    sys-kernel-config.mount  static   
    sys-kernel-debug.mount  static   
    tmp.mount  generated   
    var-lib-machines.mount  static   
    var-lib-nfs-rpc_pipefs.mount  static   
    org.cups.cupsd.path  enabled   
    ostree-finalize-staged.path  disabled   
    systemd-ask-password-console.path  static   
    systemd-ask-password-wall.path  static   
    session-4.scope  transient   
    accounts-daemon.service  disabled   
    acpid.service  enabled   
    adb.service  disabled   
    adsl.service  disabled   
    alsa-restore.service  static   
    alsa-state.service  static   
    amuled.service  disabled   
    amuleweb.service  disabled   
    apcupsd.service  enabled   
    atftpd.service  disabled   
    atop.service  disabled   
    atopacct.service  disabled   
    atopgpu.service  disabled   
    auditd.service  disabled   
    auth-rpcgss-module.service  static   
    autovt@.service  enabled   
    avahi-daemon.service  disabled   
    avahi-dnsconfd.service  disabled   
    blk-availability.service  disabled   
    bluetooth.service  enabled   
    boinc-client.service  disabled   
    bolt.service  static   
    brltty.service  disabled   
    btrfs-scrub@.service  static   
    canberra-system-bootup.service  disabled   
    canberra-system-shutdown-reboot.service  disabled   
    canberra-system-shutdown.service  disabled   
    clean-mount-point@.service  static   
    cnf.service  static   
    colord.service  static   
    configure-printer@.service  static   
    console-getty.service  disabled   
    container-getty@.service  static   
    cpupower.service  disabled   
    create_cache.service  disabled   
    cronie.service  enabled   
    cups-browsed.service  enabled   
    dbus-org.bluez.service  enabled   
    dbus-org.freedesktop.hostname1.service  static   
    dbus-org.freedesktop.import1.service  static   
    dbus-org.freedesktop.locale1.service  static   
    dbus-org.freedesktop.login1.service  static   
    dbus-org.freedesktop.machine1.service  static   
    dbus-org.freedesktop.ModemManager1.service  enabled   
    dbus-org.freedesktop.NetworkManager.service enabled   
    dbus-org.freedesktop.nm-dispatcher.service  enabled   
    dbus-org.freedesktop.portable1.service  static   
    dbus-org.freedesktop.timedate1.service  static   
    dbus.service  static   
    debug-shell.service  disabled   
    dhclient@.service  disabled   
    dhcpcd.service  disabled   
    dhcpcd@.service  disabled   
    display-manager.service  enabled   
    dm-event.service  static   
    dmraid.service  disabled   
    dnsmasq.service  disabled   
    e2scrub@.service  static   
    e2scrub_all.service  static   
    e2scrub_fail@.service  static   
    e2scrub_reap.service  disabled   
    emergency.service  static   
    fail2ban.service  enabled   
    fancontrol.service  disabled   
    flatpak-system-helper.service  static   
    foldingathome.service  disabled   
    fstrim.service  static   
    ftpd.service  disabled   
    fwupd-offline-update.service  static   
    fwupd.service  static   
    gdm.service  disabled   
    geoclue.service  static   
    getty@.service  enabled   
    git-daemon@.service  static   
    gpm.service  disabled   
    gpsd.service  disabled   
    gpsdctl@.service  static   
    grub-boot-indeterminate.service  static   
    gssproxy.service  disabled   
    haveged.service  disabled   
    hddtemp.service  disabled   
    healthd.service  disabled   
    hplip-printer@.service  static   
    httpd.service  disabled   
    imex-zfs-files.service  enabled   
    initrd-cleanup.service  static   
    initrd-parse-etc.service  static   
    initrd-switch-root.service  static   
    initrd-udevadm-cleanup-db.service  static   
    ip6tables.service  disabled   
    iptables.service  disabled   
    irexec.service  disabled   
    keyboardctl.service  enabled   
    kmod-static-nodes.service  static   
    krb5-kadmind.service  disabled   
    krb5-kdc.service  disabled   
    krb5-kpropd.service  disabled   
    krb5-kpropd@.service  static   
    ldconfig.service  static   
    lightdm.service  enabled   
    lircd-setup.service  disabled   
    lircd-uinput.service  disabled   
    lircd.service  disabled   
    lircmd.service  disabled   
    lm_sensors.service  enabled   
    logrotate.service  static   
    lvm2-lvmetad.service  static   
    lvm2-lvmpolld.service  static   
    lvm2-monitor.service  static   
    lvm2-pvscan@.service  static   
    man-db.service  static   
    mariadb.service  disabled   
    mariadb@.service  disabled   
    mdadm-grow-continue@.service  static   
    mdadm-last-resort@.service  static   
    mdmon@.service  static   
    mdmonitor.service  static   
    mkinitcpio-generate-shutdown-ramfs.service  static   
    ModemManager.service  enabled   
    mssql-server.service  disabled   
    mysqld.service  disabled   
    mysqld@.service  disabled   
    named.service  disabled   
    nasd.service  disabled   
    nbd.service  disabled   
    nbd@.service  disabled   
    ndctl-monitor.service  disabled   
    netctl-auto@.service  disabled   
    netctl-ifplugd@.service  disabled   
    netctl-sleep.service  disabled   
    netctl-wait-online.service  disabled   
    netctl.service  disabled   
    netctl@.service  static   
    NetworkManager-dispatcher.service  enabled   
    NetworkManager-wait-online.service  disabled   
    NetworkManager.service  enabled   
    nfs-blkmap.service  disabled   
    nfs-idmapd.service  static   
    nfs-mountd.service  static   
    nfs-server.service  disabled   
    nfs-utils.service  static   
    nmb.service  disabled   
    nscd.service  disabled   
    ntpd.service  enabled   
    ntpdate.service  disabled   
    octopi.service  disabled   
    org.cups.cups-lpd@.service  static   
    org.cups.cupsd.service  enabled   
    ostree-finalize-staged.service  static   
    ostree-prepare-root.service  static   
    ostree-remount.service  disabled   
    paccache.service  static   
    pacman-init.service  disabled   
    polkit.service  static   
    postgresql.service  disabled   
    ppp@.service  disabled   
    pptpd.service  disabled   
    privoxy.service  enabled   
    quotaon.service  static   
    rescue.service  static   
    rfkill-block@.service  disabled   
    rfkill-unblock@.service  disabled   
    rlogin@.service  static   
    rpc-gssd.service  static   
    rpc-statd-notify.service  static   
    rpc-statd.service  static   
    rpc-svcgssd.service  static   
    rpcbind.service  disabled   
    rsh@.service  static   
    rsyncd.service  disabled   
    rsyncd@.service  static   
    rtkit-daemon.service  disabled   
    samba.service  disabled   
    saned@.service  static   
    sensord.service  disabled   
    serial-getty@.service  disabled   
    shadow.service  static   
    smartd.service  disabled   
    smb.service  disabled   
    snmpd.service  disabled   
    snmptrapd.service  disabled   
    speech-dispatcherd.service  disabled   
    spice-webdavd.service  static   
    sshd.service  enabled   
    sshd@.service  static   
    sshdgenkeys.service  static   
    sssd-autofs.service  indirect   
    sssd-ifp.service  static   
    sssd-kcm.service  indirect   
    sssd-nss.service  indirect   
    sssd-pac.service  indirect   
    sssd-pam.service  indirect   
    sssd-ssh.service  indirect   
    sssd-sudo.service  indirect   
    sssd.service  disabled   
    svnserve.service  disabled   
    sysprof2.service  static   
    sysstat-collect.service  static   
    sysstat-summary.service  static   
    sysstat.service  disabled   
    system-update-cleanup.service  static   
    systemd-ask-password-console.service  static   
    systemd-ask-password-wall.service  static   
    systemd-backlight@.service  static   
    systemd-binfmt.service  static   
    systemd-bless-boot.service  static   
    systemd-boot-check-no-failures.service  disabled   
    systemd-coredump@.service  static   
    systemd-exit.service  static   
    systemd-firstboot.service  static   
    systemd-fsck-root.service  enabled-runtime
    systemd-fsck@.service  static   
    systemd-halt.service  static   
    systemd-hibernate-resume@.service  static   
    systemd-hibernate.service  static   
    systemd-hostnamed.service  static   
    systemd-hwdb-update.service  static   
    systemd-hybrid-sleep.service  static   
    systemd-importd.service  static   
    systemd-initctl.service  static   
    systemd-journal-catalog-update.service  static   
    systemd-journal-flush.service  static   
    systemd-journal-gatewayd.service  indirect   
    systemd-journal-remote.service  indirect   
    systemd-journal-upload.service  disabled   
    systemd-journald.service  static   
    systemd-kexec.service  static   
    systemd-localed.service  static   
    systemd-logind.service  static   
    systemd-machine-id-commit.service  static   
    systemd-machined.service  static   
    systemd-modules-load.service  static   
    systemd-networkd-wait-online.service  disabled   
    systemd-networkd.service  disabled   
    systemd-nspawn@.service  disabled   
    systemd-portabled.service  static   
    systemd-poweroff.service  static   
    systemd-quotacheck.service  static   
    systemd-random-seed.service  static   
    systemd-reboot.service  static   
    systemd-remount-fs.service  enabled-runtime
    systemd-resolved.service  disabled   
    systemd-rfkill.service  static   
    systemd-suspend-then-hibernate.service  static   
    systemd-suspend.service  static   
    systemd-sysctl.service  static   
    systemd-sysusers.service  static   
    systemd-time-wait-sync.service  disabled   
    systemd-timedated.service  static   
    systemd-timesyncd.service  enabled   
    systemd-tmpfiles-clean.service  static   
    systemd-tmpfiles-setup-dev.service  static   
    systemd-tmpfiles-setup.service  static   
    systemd-udev-settle.service  static   
    systemd-udev-trigger.service  static   
    systemd-udevd.service  static   
    systemd-update-done.service  static   
    systemd-update-utmp.service  static   
    systemd-user-sessions.service  static   
    systemd-vconsole-setup.service  static   
    systemd-volatile-root.service  static   
    talk.service  indirect   
    teamd@.service  static   
    telnet@.service  static   
    tftpd.service  disabled   
    tor.service  enabled   
    udisks.service  static   
    udisks2.service  disabled   
    updatedb.service  static   
    upower.service  disabled   
    usb_modeswitch@.service  static   
    usbmuxd.service  static   
    user-runtime-dir@.service  static   
    user@.service  static   
    uuidd.service  indirect   
    vboxweb.service  disabled   
    wacom-inputattach@.service  static   
    winbind.service  disabled   
    wpa_supplicant-nl80211@.service  disabled   
    wpa_supplicant-wired@.service  disabled   
    wpa_supplicant.service  disabled   
    wpa_supplicant@.service  disabled   
    xfs_scrub@.service  static   
    xfs_scrub_all.service  static   
    xfs_scrub_fail@.service  static   
    xinetd.service  disabled   
    zfs-import-cache.service  disabled   
    zfs-import-scan.service  disabled   
    zfs-mount.service  disabled   
    zfs-share.service  disabled   
    zfs-zed.service  disabled   
    zram-setup@.service  static   
    machine.slice  static   
    user.slice  static   
    avahi-daemon.socket  disabled   
    dbus.socket  static   
    dm-event.socket  static   
    git-daemon.socket  disabled   
    gpsd.socket  disabled   
    krb5-kpropd.socket  disabled   
    lircd.socket  disabled   
    lvm2-lvmetad.socket  static   
    lvm2-lvmpolld.socket  static   
    org.cups.cups-lpd.socket  disabled   
    org.cups.cupsd.socket  enabled   
    rlogin.socket  disabled   
    rpcbind.socket  disabled   
    rsh.socket  disabled   
    rsyncd.socket  disabled   
    saned.socket  disabled   
    sshd.socket  disabled   
    sssd-autofs.socket  disabled   
    sssd-kcm.socket  disabled   
    sssd-nss.socket  disabled   
    sssd-pac.socket  disabled   
    sssd-pam-priv.socket  disabled   
    sssd-pam.socket  disabled   
    sssd-ssh.socket  disabled   
    sssd-sudo.socket  disabled   
    syslog.socket  static   
    systemd-coredump.socket  static   
    systemd-initctl.socket  static   
    systemd-journal-gatewayd.socket  disabled   
    systemd-journal-remote.socket  disabled   
    systemd-journald-audit.socket  static   
    systemd-journald-dev-log.socket  static   
    systemd-journald.socket  static   
    systemd-networkd.socket  disabled   
    systemd-rfkill.socket  static   
    systemd-udevd-control.socket  static   
    systemd-udevd-kernel.socket  static   
    talk.socket  disabled   
    telnet.socket  disabled   
    tftpd.socket  disabled   
    uuidd.socket  disabled   
    home-swapfile.swap  generated   
    basic.target  static   
    bluetooth.target  static   
    boot-complete.target  static   
    cryptsetup-pre.target  static   
    cryptsetup.target  static   
    ctrl-alt-del.target  disabled   
    default.target  indirect   
    emergency.target  static   
    exit.target  disabled   
    final.target  static   
    getty-pre.target  static   
    getty.target  static   
    graphical.target  static   
    halt.target  disabled   
    hibernate.target  static   
    hybrid-sleep.target  static   
    initrd-fs.target  static   
    initrd-root-device.target  static   
    initrd-root-fs.target  static   
    initrd-switch-root.target  static   
    initrd.target  static   
    kbrequest.target  indirect   
    kexec.target  disabled   
    local-fs-pre.target  static   
    local-fs.target  static   
    machines.target  disabled   
    multi-user.target  indirect   
    network-online.target  static   
    network-pre.target  static   
    network.target  static   
    nfs-client.target  disabled   
    nss-lookup.target  static   
    nss-user-lookup.target  static   
    paths.target  static   
    poweroff.target  disabled   
    printer.target  static   
    reboot.target  disabled   
    remote-cryptsetup.target  disabled   
    remote-fs-pre.target  static   
    remote-fs.target  enabled   
    rescue.target  indirect   
    rpc_pipefs.target  static   
    rpcbind.target  static   
    runlevel0.target  disabled   
    runlevel1.target  indirect   
    runlevel2.target  indirect   
    runlevel3.target  indirect   
    runlevel4.target  indirect   
    runlevel5.target  static   
    runlevel6.target  disabled   
    shutdown.target  static   
    sigpwr.target  static   
    sleep.target  static   
    slices.target  static   
    smartcard.target  static   
    sockets.target  static   
    sound.target  static   
    suspend-then-hibernate.target  static   
    suspend.target  static   
    swap.target  static   
    sysinit.target  static   
    system-update-pre.target  static   
    system-update.target  static   
    time-sync.target  static   
    timers.target  static   
    umount.target  static   
    zfs-import.target  disabled   
    zfs.target  enabled   
    btrfs-scrub@.timer  disabled   
    cnf.timer  disabled   
    e2scrub_all.timer  disabled   
    fstrim.timer  disabled   
    logrotate.timer  disabled   
    man-db.timer  disabled   
    mdadm-last-resort@.timer  static   
    paccache.timer  disabled   
    shadow.timer  static   
    sysstat-collect.timer  disabled   
    sysstat-summary.timer  disabled   
    systemd-tmpfiles-clean.timer  static   
    updatedb.timer  masked   
    xfs_scrub_all.timer  disabled   
    
    
    Ne vidim nista ovde sto bi pozivalo initdb skriptu, ali sigurno negde jeste u ovima.
     
  4. webad

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    Zaboravio sam da naglasim jos jedno moje ogranicenje:
    Meni su svi pg-ovi vec godinama unazad na centos-u, a trenutno su na v10.

    Nisam pitao, da li se napravi prazan "data" dir?
    Nakon boot-a, pre nego sto se mount-uje disk i pokrene PG, ako se ustanovi da se napravio problematican direktorijum, da li si analizirao log-ove?
    Bacicu pogled ako vidim nesto u ovom spisku (ali iskreno ne polazem mnogo nade :) )
    Stvari koje mi padaju na pamet:
    • Mozda se prilikom shutdown-a umount-uje disk, a ostanu PG procesi
    • Mozda u cron-u, anacron-u, at-u ili nekom drugom servisu tog tipa imas neke poslove koji pokusavaju pre nego sto PG bude osposobljen ili nakon sto bude onesposobljen
    • Mozda u PG postoji neki proces koji zove eksterni rad sa sistemom (copy to program)
    • Da mount-ujes na drugu lokaciju i postgresql.conf promenis "data_directory" da gleda na tu novu lokaciju. U zavisnosti da li ce problem da se pokaze ponovo na novoj ili staroj lokaciji moze da ukaze da li problem pravi neki PG-ov proces ili mozda postoji neka druga spodoba koja pokusava nesto da radi
     
    Branimir Maksimovic likes this.
  5. Branimir Maksimovic

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    postgres je dizejblovan, tako da nema procesa (mislim), ne bi trebalo. Ovo je od skora pocelo da se pojavljuje, i to sam pre par dana
    uopste primetio zato sto naprasno data set nije mogao da se mount-uje. Nepogresivo nesto pravi data dir svaki put, pretpostavljam
    prilikom boot-a. Probacu ovo sto si naveo, u nadi da cu otkriti sta pravi taj data dir.
    U cron-u i systemd timerima nema nista sumnjivo.
    Kad dodjem kuci probacu da premestim data dir pa da vidim sta ce da se desi.
     
  6. webad

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    Mozes li dati odgovor na ovo? Ako nije prazan, sta je sadrzaj, tj da li se kreira "sve (ili delimicno) sto treba" za funkcionisanje PG-a?

    Ako ne gresim, disejblovan je za automatsko paljenje pri boot-u. To nema veze sa time da se on kasnije upali, radi normalno, pokrene proces gasenja, umount-uje disk, a PG nije zavrsio sa gasenjem, tj neki procesi/upiti ostaju da se izvrsavaju i potencijalno pokusaju da skladiste svoj rezultat.

    Ovo pricamo o kucnom ili kakvom racunaru pa je u pitanju db server koji se redovno restartuje? Ako je tako, nisam imao iskustva ni sa takvom situacijom sto se tice dela da je "data" na sporednom disku.
     
  7. Branimir Maksimovic

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    Kad stignem kuci mogu da vidim dal je prazan data dir nakon boot-a.
    Procesa nema zato sto je to moja kucna masina, i startujem samo kad testiram nesto. Ali neki pg proces se definitivno startuje
    a da ja za to ne znam;)
     
  8. Branimir Maksimovic

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    Napravi prazan data dir i nista vise. Hm.
     
  9. webad

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    Jako zanimljivo. Ako je prazan, onda nije greskom vrsena regularna inicijalizacija baze, tj nije initdb (valjda) nego nesto drugo mozda zahteva postojanje direktorijuma jednostavnim "mkdir -p". Moze neka pomoc biti i vreme kreiranja direktorijuma za pretragu po log-ovima.
    Dodatno igranje koje mi pada na pamet kako da utvrdimo da li se dir pravi prilikom paljenja ili prilikom gasenja:
    • ugasiti
    • upaliti neki live sistem preko diska ili usb-a
    • videti da li postoji data dir
    • zatim se vratiti na "normalan" sistem
    Moguci scenariji su:
    • ne postoji data dir u live + ne postoji data dir u normalnom
      • try again
    • postoji data dir u live
      • znaci da je nastao prilikom gasenja
    • ne postoji data dir u live, ali postoji u normalnom
      • znaci da je nastao prilikom paljenja
     
    Commander likes this.
  10. Branimir Maksimovic

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    Ma jednostavno ugasim, sacekam neko vreme, pa upalim. Vreme kreiranja data dira ce otkriti da li je u shutdown ili boot vremenu.
     
  11. Branimir Maksimovic

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    Znaci nesto prilikom boot-a to pravi.
     
  12. webad

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    Nisam pametan da kazem ko je kriv..
    Ko je owner, ko ima ovlascenja nad direktorijumom? root ili neko treci?
    Po vremenu kreiranja juriti po log-ovima da li je iko ista prijavio.
    Mozda ici i ekstremno pa brisati PG (naravno backup pre toga) i videti da li ce se i dalje dogadjati.

    Da li imas nesto kao "/etc/postgresql/.../postgresql.conf"?
    U startu nisam pitao, mozda pomogne u istrazi: koji OS i verzija PG-a?
     
  13. Branimir Maksimovic

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    Nema /etc/post..., Manjaro, Zadnja verzija 11.2.
    Vlasnik dira je postgress.

    Nego mislim mozda je to neki servis systemd-a koji tako
    kreira direktorijume i negde je zakucano da taj data dir
    mora postojati. Kazem, to je od skora neka izmena, ranije
    nije bilo.
     
  14. Branimir Maksimovic

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    Nasao sam sta je!
    systemd kreira tmp direktorijume iz /var/lib/tmpfiles.d
    I gle
    Code:
    usr/lib/tmpfiles.d >>> cat postgresql.conf   
    d /var/lib/postgres/data 700 postgres postgres
    usr/lib/tmpfiles.d >>> pacman -Qo postgresql.conf   
    /usr/lib/tmpfiles.d/postgresql.conf is owned by postgresql 11.2-3
    
    Znaci postgres je napusao da se tu pravi tmp dir ;(
    Kakav bedak.
    Nista jedan rm i resen problem. Bar sam naucio kako da nateram systemd
    da pravi direktorijume ;)
     
    webad likes this.