Eliminate the null mount for /etc for diskless clients.
This commit is contained in:
Brian S. Dean
parent
fcc069af4a
commit
58d3c43935
@ -30,10 +30,11 @@
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#
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# BOOTP has mounted / for us. Assume a read-only mount. We must then
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# - figure out our IP by querying the interface
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# - fill /conf/etc (writable) with files from /etc, and then update
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# per-machine files from /conf/*/ where * is the IP of the host,
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# the IP of the subnet, "default", or nothing.
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# - mount /conf/etc over /etc so we can see the new files.
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# - copy /etc temporarily out of the way to /tmp/etc
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# - mount /etc as an MFS
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# - repopulate /etc with the saved off copy
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# - override files in /etc with files from /conf/*/etc where
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# '*' is default, netmask of client, ip-address of client
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#
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# WARNING: i thing you should not change /etc/rc or strange things could
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# happen.
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@ -87,39 +88,42 @@ for i in ${iflist} ; do
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fi
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done
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echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}"
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# Files in /etc are copied to /conf/etc which is writable. Then
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# per-machine configs from /conf/ip.address/etc are copied onto this
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# directory. First choice is using the client's IP, then the client's
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# broadcast address, then a default configuration.
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# Create an MFS /tmp to temporarily hold files from /etc until we
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# can bootstrap /etc as an MFS.
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/sbin/mount_mfs -s 4096 -T qp120at dummy /tmp
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chkerr $? "MFS mount on /tmp"
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/bin/cp -Rp /etc /tmp
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chkerr $? "cp /etc to /tmp/etc MFS"
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/sbin/mount_mfs -s 4096 -T qp120at dummy /etc
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chkerr $? "MFS mount on /etc"
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/bin/chmod 755 /etc
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/bin/cp -Rp /tmp/etc/* /etc
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chkerr $? "cp /tmp/etc to /etc MFS"
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rm -rf /tmp/etc
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/sbin/umount /tmp
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# Allow for override files to replace files in /etc. Use /conf/*/etc
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# to find the override files. First choice is default files that
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# always override, then files that from the directory that matches the
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# client's broadcast address, finally followed by overrides that match
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# the client's IP address.
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#
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# This way we have some flexibility to handle clusters of machines
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# on separate subnets.
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#
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# WARNING! null mounts cannot handle mmap, and since many programs
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# use mmap (such as 'cp'), we have to copy.
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#
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mount_mfs -s 2048 -T qp120at dummy /conf/etc
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cp -Rp /etc/* /conf/etc
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chkerr $? "MFS mount on /conf/etc"
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# Pick up default, network-specific, and host-specific config, in that
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# order
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if [ -d /conf/default/etc/ ]; then
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cp -Rp /conf/default/etc/* /conf/etc
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fi
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if [ -d /conf/${bootp_ipbca} ] ; then
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cp -Rp /conf/${bootp_ipbca}/etc/* /conf/etc
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fi
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if [ -d /conf/${bootp_ipa} ] ; then
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cp -Rp /conf/${bootp_ipa}/etc/* /conf/etc
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fi
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# Make the new directory available as /etc
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#
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mount_null /conf/etc /etc
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for i in default ${bootp_ipbca} ${bootp_ipa} ; do
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if [ -d /conf/${i}/etc ]; then
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cp -Rp /conf/${i}/etc/* /etc
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fi
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done
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# Tell /etc/rc to run the specified script after
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# it does its mounts but before it does anything
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@ -30,10 +30,11 @@
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#
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# BOOTP has mounted / for us. Assume a read-only mount. We must then
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# - figure out our IP by querying the interface
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# - fill /conf/etc (writable) with files from /etc, and then update
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# per-machine files from /conf/*/ where * is the IP of the host,
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# the IP of the subnet, "default", or nothing.
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# - mount /conf/etc over /etc so we can see the new files.
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# - copy /etc temporarily out of the way to /tmp/etc
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# - mount /etc as an MFS
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# - repopulate /etc with the saved off copy
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# - override files in /etc with files from /conf/*/etc where
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# '*' is default, netmask of client, ip-address of client
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#
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# WARNING: i thing you should not change /etc/rc or strange things could
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# happen.
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@ -87,39 +88,42 @@ for i in ${iflist} ; do
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fi
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done
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echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}"
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# Files in /etc are copied to /conf/etc which is writable. Then
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# per-machine configs from /conf/ip.address/etc are copied onto this
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# directory. First choice is using the client's IP, then the client's
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# broadcast address, then a default configuration.
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# Create an MFS /tmp to temporarily hold files from /etc until we
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# can bootstrap /etc as an MFS.
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/sbin/mount_mfs -s 4096 -T qp120at dummy /tmp
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chkerr $? "MFS mount on /tmp"
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/bin/cp -Rp /etc /tmp
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chkerr $? "cp /etc to /tmp/etc MFS"
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/sbin/mount_mfs -s 4096 -T qp120at dummy /etc
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chkerr $? "MFS mount on /etc"
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/bin/chmod 755 /etc
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/bin/cp -Rp /tmp/etc/* /etc
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chkerr $? "cp /tmp/etc to /etc MFS"
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rm -rf /tmp/etc
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/sbin/umount /tmp
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# Allow for override files to replace files in /etc. Use /conf/*/etc
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# to find the override files. First choice is default files that
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# always override, then files that from the directory that matches the
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# client's broadcast address, finally followed by overrides that match
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# the client's IP address.
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#
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# This way we have some flexibility to handle clusters of machines
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# on separate subnets.
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#
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# WARNING! null mounts cannot handle mmap, and since many programs
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# use mmap (such as 'cp'), we have to copy.
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#
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mount_mfs -s 2048 -T qp120at dummy /conf/etc
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cp -Rp /etc/* /conf/etc
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chkerr $? "MFS mount on /conf/etc"
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# Pick up default, network-specific, and host-specific config, in that
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# order
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if [ -d /conf/default/etc/ ]; then
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cp -Rp /conf/default/etc/* /conf/etc
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fi
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if [ -d /conf/${bootp_ipbca} ] ; then
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cp -Rp /conf/${bootp_ipbca}/etc/* /conf/etc
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fi
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if [ -d /conf/${bootp_ipa} ] ; then
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cp -Rp /conf/${bootp_ipa}/etc/* /conf/etc
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fi
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# Make the new directory available as /etc
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#
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mount_null /conf/etc /etc
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for i in default ${bootp_ipbca} ${bootp_ipa} ; do
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if [ -d /conf/${i}/etc ]; then
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cp -Rp /conf/${i}/etc/* /etc
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fi
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done
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# Tell /etc/rc to run the specified script after
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# it does its mounts but before it does anything
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@ -30,10 +30,11 @@
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#
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# BOOTP has mounted / for us. Assume a read-only mount. We must then
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# - figure out our IP by querying the interface
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# - fill /conf/etc (writable) with files from /etc, and then update
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# per-machine files from /conf/*/ where * is the IP of the host,
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# the IP of the subnet, "default", or nothing.
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# - mount /conf/etc over /etc so we can see the new files.
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# - copy /etc temporarily out of the way to /tmp/etc
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# - mount /etc as an MFS
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# - repopulate /etc with the saved off copy
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# - override files in /etc with files from /conf/*/etc where
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# '*' is default, netmask of client, ip-address of client
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#
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# WARNING: i thing you should not change /etc/rc or strange things could
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# happen.
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@ -87,39 +88,42 @@ for i in ${iflist} ; do
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fi
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done
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echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}"
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# Files in /etc are copied to /conf/etc which is writable. Then
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# per-machine configs from /conf/ip.address/etc are copied onto this
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# directory. First choice is using the client's IP, then the client's
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# broadcast address, then a default configuration.
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# Create an MFS /tmp to temporarily hold files from /etc until we
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# can bootstrap /etc as an MFS.
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/sbin/mount_mfs -s 4096 -T qp120at dummy /tmp
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chkerr $? "MFS mount on /tmp"
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/bin/cp -Rp /etc /tmp
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chkerr $? "cp /etc to /tmp/etc MFS"
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/sbin/mount_mfs -s 4096 -T qp120at dummy /etc
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chkerr $? "MFS mount on /etc"
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/bin/chmod 755 /etc
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/bin/cp -Rp /tmp/etc/* /etc
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chkerr $? "cp /tmp/etc to /etc MFS"
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rm -rf /tmp/etc
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/sbin/umount /tmp
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# Allow for override files to replace files in /etc. Use /conf/*/etc
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# to find the override files. First choice is default files that
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# always override, then files that from the directory that matches the
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# client's broadcast address, finally followed by overrides that match
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# the client's IP address.
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#
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# This way we have some flexibility to handle clusters of machines
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# on separate subnets.
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#
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# WARNING! null mounts cannot handle mmap, and since many programs
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# use mmap (such as 'cp'), we have to copy.
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#
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mount_mfs -s 2048 -T qp120at dummy /conf/etc
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cp -Rp /etc/* /conf/etc
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chkerr $? "MFS mount on /conf/etc"
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# Pick up default, network-specific, and host-specific config, in that
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# order
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if [ -d /conf/default/etc/ ]; then
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cp -Rp /conf/default/etc/* /conf/etc
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fi
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if [ -d /conf/${bootp_ipbca} ] ; then
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cp -Rp /conf/${bootp_ipbca}/etc/* /conf/etc
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fi
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if [ -d /conf/${bootp_ipa} ] ; then
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cp -Rp /conf/${bootp_ipa}/etc/* /conf/etc
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fi
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# Make the new directory available as /etc
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#
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mount_null /conf/etc /etc
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for i in default ${bootp_ipbca} ${bootp_ipa} ; do
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if [ -d /conf/${i}/etc ]; then
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cp -Rp /conf/${i}/etc/* /etc
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fi
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done
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# Tell /etc/rc to run the specified script after
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# it does its mounts but before it does anything
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