[Bug 1576341] Re: fails in lxd container

[Nish Aravamudan]

Did some digging on the mlockall failure:

        /* we don't want our active sessions to be paged out... */
        if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
                log_error("failed to mlockall, exiting...");
                log_close(log_pid);
                exit(ISCSI_ERR);
        }

so I think it's a real issue for iscsid (and I'm not sure we want to
debug random failures in the code if it can't ensure it's 'active
sessions') don't stay in memory.


That change, fwiw, was originally introduced in 2005:

https://github.com/open-iscsi/open-
iscsi/commit/6f37c861162157f4a6e28c2fa3cf50e61726c8f3

so it's unlikely to have been tested anytime recently without it :)

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https://bugs.launchpad.net/bugs/1576341

Title:
  fails in lxd container

Status in lvm2 package in Ubuntu:
  Confirmed
Status in lxd package in Ubuntu:
  Invalid
Status in open-iscsi package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  The ubuntu:xenial image shows 'degraded' state in lxd on initial boot.

  $ lxc launch xenial x1
  $ sleep 10
  $ lxc file pull x1/etc/cloud/build.info -
  build_name: server
  serial: 20160420-145324

  $ lxc exec x1 systemctl is-system-running
  degraded

  $ lxc exec x1 -- systemctl --state=failed
    UNIT                          LOAD   ACTIVE SUB    DESCRIPTION
  ● dev-hugepages.mount           loaded failed failed Huge Pages File System
  ● iscsid.service                loaded failed failed iSCSI initiator daemon (iscsid)
  ● open-iscsi.service            loaded failed failed Login to default iSCSI targets
  ● systemd-remount-fs.service    loaded failed failed Remount Root and Kernel File Systems
  ● systemd-sysctl.service        loaded failed failed Apply Kernel Variables
  ● lvm2-lvmetad.socket           loaded failed failed LVM2 metadata daemon socket
  ● systemd-journald-audit.socket loaded failed failed Journal Audit Socket

  LOAD   = Reflects whether the unit definition was properly loaded.
  ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
  SUB    = The low-level unit activation state, values depend on unit type.

  7 loaded units listed. Pass --all to see loaded but inactive units, too.
  To show all installed unit files use 'systemctl list-unit-files'.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: open-iscsi 2.0.873+git0.3b4b4500-14ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
  Uname: Linux 4.4.0-18-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  Date: Thu Apr 28 17:28:04 2016
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
  SourcePackage: open-iscsi
  UpgradeStatus: No upgrade log present (probably fresh install)

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