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101 lines
3.5 KiB
Markdown
101 lines
3.5 KiB
Markdown
# Building and installing SCST
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## Prerequisites
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If the following packages have not yet been installed, install these now:
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bzip2
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gcc
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kernel-devel or kernel-default-devel
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kernel-modules-extra (only on Fedora)
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libelf-dev, libelf-devel or elfutils-libelf-devel
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libperl-dev or perl-devel
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make
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perl
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perl-Data-Dumper
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perl-ExtUtils-MakeMaker (not needed on Debian systems)
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rpm-build (only on RPM-based systems)
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tar
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## Building SCST
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The next step is to build and install SCST. How to do that depends on whether
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or not your Linux distribution supports a package manager:
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make release
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if rpm -q glibc >/dev/null 2>&1; then
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rm -rf {,scstadmin/}rpmbuilddir
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make rpm
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sudo rpm -U $PWD/{,scstadmin/}rpmbuilddir/RPMS/*/*.rpm
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elif dpkg-query -s libc-bin >/dev/null 2>&1; then
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sudo apt install build-essential debhelper devscripts gcc make lintian quilt
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sudo apt install linux-headers-$(uname -r) || sudo apt install pve-headers-$(uname -r)
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make dpkg
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sudo dpkg -i $PWD/dpkg/{scst,iscsi-scst,scstadmin}_*.deb
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else
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make 2release
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BUILD_2X_MODULE=y CONFIG_SCSI_QLA_FC=y CONFIG_SCSI_QLA2XXX_TARGET=y make all
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sudo BUILD_2X_MODULE=y CONFIG_SCSI_QLA_FC=y CONFIG_SCSI_QLA2XXX_TARGET=y make -C "$PWD" install
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fi
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Since the above step installs several kernel modules into directory
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/lib/modules/$(uname -r), that step has to be repeated every time a new kernel
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or a kernel update has been installed. If you want to avoid this, install the
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scst-dkms package instead of the scst package.
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For example, if you want to have dkms support for your SCST rpm install, then
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you would use the following command to make your SCST packages:
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make rpm-dkms
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or
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make scst-dkms-rpm
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make rpm-dkms also builds scstadmin packages in addition to the SCST dkms
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packages. Both make commands will create rpm packages that will cause SCST to be
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automatically rebuilt and installed every time a new kernel version is
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installed and booted for which the SCST kernel modules had not yet been built
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so that SCST rpm packages will not need to be rebuilt after each kernel update.
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## Configuring SCST
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The easiest way to configure SCST is to create a configuration file
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/etc/scst.conf and by using scstadmin to load that configuration file. The
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/etc/init.d/scst script uses scstadmin to load the /etc/scst.conf file. The
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following information is present in /etc/scst.conf:
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* Which local storage has to be exported by SCST, e.g. a file, block device or
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SCSI device.
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* Through which storage adapter ports SCST allows access to the local
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storage.
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* Which initiator systems are allowed to log in.
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For more information about scst.conf, see also
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scstadmin/scstadmin.sysfs/man5/scst.conf.5.
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Loading the SCST kernel modules and applying the /etc/scst.conf configuration
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file is possible as follows:
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/etc/init.d/scst restart
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After SCST has been loaded, configuration changes can be applied without
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unloading and reloading the SCST kernel modules:
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scstadmin -config /etc/scst.conf
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After the SCST configuration has been changed via scstadmin or by modifying the
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SCST sysfs attributes, the new configuration can be saved e.g. as follows:
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scstadmin -write_config /etc/scst.conf.new
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More information about the device handler and target driver sysfs attributes
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can be found in the scst/README document. More detailed instructions about
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iSCSI, QLogic FC, SRP and FCoE configuration can be found in the following
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documents:
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* iscsi-scst/README
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* qla2x00t/doc/qla2x00t-howto.html
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* srpt/README
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* fcst/README
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