ca61e6a1bb
Save vmcore-dmesg.txt before saving vmcore. For ssh targets, it assumes
that ssh is enabled. No scp logic as I don't have a local copy of
kernel log buffers and saving one will consume extra memory. We
can possibly enhance this logic to save kernel log buffers first locally
and then scp it (For setups which allow scp but disable ssh access).
(log is from Vivek Goyal <vgoyal@redhat.com>)
And add 1 section to describe it in kexec-kdump-howto.txt
v3->v4:
Remove old description of dmesg in kexec-kdump-howto.txt, now
add a new section to describe it, and note user kernel log
buffers won't be available if dump target is raw device.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
410 lines
12 KiB
Bash
Executable File
410 lines
12 KiB
Bash
Executable File
#!/bin/bash
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. $dracutfunctions
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check() {
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[[ $debug ]] && set -x
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#kdumpctl sets this explicitly
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if [ -z "$IN_KDUMP" ] || [ ! -f /etc/kdump.conf ]
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then
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return 1
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fi
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return 0
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}
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depends() {
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echo "base shutdown"
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return 0
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}
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is_ssh_dump_target()
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{
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grep -q "^ssh[[:blank:]].*@" /etc/kdump.conf
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}
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kdump_to_udev_name() {
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local dev="${1//\"/}"
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case "$dev" in
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UUID=*)
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dev=`blkid -U "${dev#UUID=}"`
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;;
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LABEL=*)
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dev=`blkid -L "${dev#LABEL=}"`
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;;
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esac
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echo $(get_persistent_dev "$dev")
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}
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kdump_is_bridge() {
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[ -d /sys/class/net/"$1"/bridge ]
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}
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kdump_is_bond() {
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[ -d /sys/class/net/"$1"/bonding ]
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}
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kdump_is_team() {
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[ -f /usr/bin/teamnl ] && teamnl $1 ports &> /dev/null
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}
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kdump_is_vlan() {
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[ -f /proc/net/vlan/"$1" ]
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}
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# $1: netdev name
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kdump_setup_dns() {
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_dnsfile=${initdir}/etc/cmdline.d/42dns.conf
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. /etc/sysconfig/network-scripts/ifcfg-$1
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[ -n "$DNS1" ] && echo "nameserver=$DNS1" > "$_dnsfile"
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[ -n "$DNS2" ] && echo "nameserver=$DNS2" >> "$_dnsfile"
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}
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#$1: netdev name
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#checking /etc/sysconfig/network-scripts/ifcfg-$1,
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#if it use static ip echo it, or echo null
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kdump_static_ip() {
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. /etc/sysconfig/network-scripts/ifcfg-$1
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if [ -n "$IPADDR" ]; then
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[ -z "$NETMASK" -a -n "$PREFIX" ] && \
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NETMASK=$(ipcalc -m $IPADDR/$PREFIX | cut -d'=' -f2)
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echo -n "${IPADDR}::${GATEWAY}:${NETMASK}::"
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fi
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}
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kdump_get_mac_addr() {
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echo `ip addr show $1 2>/dev/null|awk '/ether/{ print $2 }'`
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}
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#Bonding or team master modifies the mac address
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#of its slaves, we should use perm address
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kdump_get_perm_addr() {
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local addr=$(ethtool -P $1 | sed -e 's/Permanent address: //')
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if [ -z "$addr" ] || [ "$addr" = "00:00:00:00:00:00" ]
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then
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derror "Can't get the permanent address of $1"
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else
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echo "$addr"
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fi
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}
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kdump_setup_bridge() {
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local _netdev=$1
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for _dev in `ls /sys/class/net/$_netdev/brif/`; do
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if kdump_is_bond "$_dev"; then
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kdump_setup_bond "$_dev"
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elif kdump_is_team "$_dev"; then
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kdump_setup_team "$_dev"
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elif kdump_is_vlan "$_dev"; then
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kdump_setup_vlan "$_dev"
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else
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echo -n " ifname=$_dev:$(kdump_get_mac_addr $_dev)" >> ${initdir}/etc/cmdline.d/41bridge.conf
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fi
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done
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echo " bridge=$_netdev:$(cd /sys/class/net/$_netdev/brif/; echo * | sed -e 's/ /,/g')" >> ${initdir}/etc/cmdline.d/41bridge.conf
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}
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kdump_setup_bond() {
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local _netdev=$1
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for _dev in `cat /sys/class/net/$_netdev/bonding/slaves`; do
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echo -n " ifname=$_dev:$(kdump_get_mac_addr $_dev)" >> ${initdir}/etc/cmdline.d/42bond.conf
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done
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echo -n " bond=$_netdev:$(sed -e 's/ /,/g' /sys/class/net/$_netdev/bonding/slaves)" >> ${initdir}/etc/cmdline.d/42bond.conf
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# Get bond options specified in ifcfg
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. /etc/sysconfig/network-scripts/ifcfg-$_netdev
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bondoptions="$(echo :$BONDING_OPTS | sed 's/\s\+/,/')"
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echo "$bondoptions" >> ${initdir}/etc/cmdline.d/42bond.conf
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}
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kdump_setup_team() {
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local _netdev=$1
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local slaves=""
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for _dev in `teamnl $_netdev ports | awk -F':' '{print $2}'`; do
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echo -n " ifname=$_dev:$(kdump_get_perm_addr $_dev)" >> ${initdir}/etc/cmdline.d/44team.conf
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slaves+="$_dev,"
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done
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echo " team=$_netdev:$(echo $slaves | sed -e 's/,$//')" >> ${initdir}/etc/cmdline.d/44team.conf
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#Buggy version teamdctl outputs to stderr!
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#Try to use the latest version of teamd.
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teamdctl "$_netdev" config dump > /tmp/$$-$_netdev.conf
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if [ $? -ne 0 ]
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then
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derror "teamdctl failed."
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exit 1
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fi
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inst_dir /etc/teamd
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inst_simple /tmp/$$-$_netdev.conf "/etc/teamd/$_netdev.conf"
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rm -f /tmp/$$-$_netdev.conf
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}
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kdump_setup_vlan() {
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local _netdev=$1
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local _phydev="$(awk '/^Device:/{print $2}' /proc/net/vlan/"$_netdev")"
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local _netmac="$(kdump_get_mac_addr $_phydev)"
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echo " vlan=$_netdev:$_phydev" > ${initdir}/etc/cmdline.d/43vlan.conf
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#Just support vlan over bond, it is not easy
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#to support all other complex setup
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if kdump_is_bridge "$_phydev"; then
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derror "Vlan over bridge is not supported!"
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exit 1
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elif kdump_is_team "$_phydev"; then
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derror "Vlan over team is not supported!"
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exit 1
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elif kdump_is_bond "$_phydev"; then
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kdump_setup_bond "$_phydev"
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else
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echo " vlan=$_netdev:$_phydev ifname=$_phydev:$_netmac" > ${initdir}/etc/cmdline.d/43vlan.conf
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fi
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}
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# setup s390 znet cmdline
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# $1: netdev name
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kdump_setup_znet() {
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local _options=""
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. /etc/sysconfig/network-scripts/ifcfg-$1
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for i in $OPTIONS; do
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_options=${_options},$i
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done
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echo rd.znet=${NETTYPE},${SUBCHANNELS}${_options} > ${initdir}/etc/cmdline.d/30znet.conf
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}
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# Setup dracut to bringup a given network interface
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kdump_setup_netdev() {
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local _netdev=$1
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local _static _proto
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if [ "$(uname -m)" = "s390x" ]; then
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kdump_setup_znet $_netdev
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fi
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_netmac=`ip addr show $_netdev 2>/dev/null|awk '/ether/{ print $2 }'`
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_static=$(kdump_static_ip $_netdev)
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if [ -n "$_static" ]; then
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_proto=none
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else
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_proto=dhcp
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fi
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echo " ip=${_static}$_netdev:${_proto}" > ${initdir}/etc/cmdline.d/40ip.conf
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if kdump_is_bridge "$_netdev"; then
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kdump_setup_bridge "$_netdev"
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elif kdump_is_bond "$_netdev"; then
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kdump_setup_bond "$_netdev"
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elif kdump_is_team "$_netdev"; then
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kdump_setup_team "$_netdev"
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elif kdump_is_vlan "$_netdev"; then
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kdump_setup_vlan "$_netdev"
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else
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echo " ifname=$_netdev:$(kdump_get_mac_addr $_netdev)" >> ${initdir}/etc/cmdline.d/40ip.conf
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fi
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kdump_setup_dns "$_netdev"
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}
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#Function:kdump_install_net
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#$1: config values of net line in kdump.conf
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kdump_install_net() {
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local _server _netdev
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local config_val="$1"
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_server=`echo $config_val | sed 's/.*@//' | cut -d':' -f1`
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_need_dns=`echo $_server|grep "[a-zA-Z]"`
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[ -n "$_need_dns" ] && _server=`getent hosts $_server|cut -d' ' -f1`
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_netdev=`/sbin/ip route get to $_server 2>&1`
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[ $? != 0 ] && echo "Bad kdump location: $config_val" && exit 1
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#the field in the ip output changes if we go to another subnet
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if [ -n "`echo $_netdev | grep via`" ]
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then
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# we are going to a different subnet
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_netdev=`echo $_netdev|awk '{print $5;}'|head -n 1`
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else
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# we are on the same subnet
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_netdev=`echo $_netdev|awk '{print $3}'|head -n 1`
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fi
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kdump_setup_netdev "${_netdev}"
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#save netdev used for kdump as cmdline
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echo "kdumpnic=${_netdev}" > ${initdir}/etc/cmdline.d/60kdumpnic.conf
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echo "bootdev=${_netdev}" > ${initdir}/etc/cmdline.d/70bootdev.conf
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}
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#install kdump.conf and what user specifies in kdump.conf
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kdump_install_conf() {
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sed -ne '/^#/!p' /etc/kdump.conf > /tmp/$$-kdump.conf
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while read config_opt config_val;
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do
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case "$config_opt" in
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ext[234]|xfs|btrfs|minix|raw)
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sed -i -e "s#$config_val#$(kdump_to_udev_name $config_val)#" /tmp/$$-kdump.conf
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;;
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ssh|nfs)
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kdump_install_net "$config_val"
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;;
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kdump_pre|kdump_post|extra_bins)
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dracut_install $config_val
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;;
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core_collector)
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dracut_install "${config_val%% *}"
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;;
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esac
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done < /etc/kdump.conf
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inst "/tmp/$$-kdump.conf" "/etc/kdump.conf"
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rm -f /tmp/$$-kdump.conf
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}
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kdump_iscsi_get_rec_val() {
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local result
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# The open-iscsi 742 release changed to using flat files in
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# /var/lib/iscsi.
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result=$(/sbin/iscsiadm --show -m session -r ${1} | grep "^${2} = ")
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result=${result##* = }
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echo $result
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}
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kdump_get_iscsi_initiator() {
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local _initiator
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local initiator_conf="/etc/iscsi/initiatorname.iscsi"
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[ -f "$initiator_conf" ] || return 1
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while read _initiator; do
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[ -z "${_initiator%%#*}" ] && continue # Skip comment lines
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case $_initiator in
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InitiatorName=*)
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initiator=${_initiator#InitiatorName=}
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echo "rd.iscsi.initiator=${initiator}"
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return 0;;
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*) ;;
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esac
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done < ${initiator_conf}
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return 1
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}
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# No ibft handling yet.
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kdump_setup_iscsi_device() {
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local path=$1
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local tgt_name; local tgt_ipaddr;
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local username; local password; local userpwd_str;
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local username_in; local password_in; local userpwd_in_str;
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local netdev
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local idev
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local netroot_str ; local initiator_str;
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local netroot_conf="${initdir}/etc/cmdline.d/50iscsi.conf"
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local initiator_conf="/etc/iscsi/initiatorname.iscsi"
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dinfo "Found iscsi component $1"
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# Check once before getting explicit values, so we can output a decent
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# error message.
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if ! /sbin/iscsiadm -m session -r ${path} >/dev/null ; then
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derror "Unable to find iscsi record for $path"
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return 1
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fi
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tgt_name=$(kdump_iscsi_get_rec_val ${path} "node.name")
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tgt_ipaddr=$(kdump_iscsi_get_rec_val ${path} "node.conn\[0\].address")
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# get and set username and password details
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username=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.username")
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[ "$username" == "<empty>" ] && username=""
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password=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.password")
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[ "$password" == "<empty>" ] && password=""
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username_in=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.username_in")
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[ -n "$username" ] && userpwd_str="$username:$password"
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# get and set incoming username and password details
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[ "$username_in" == "<empty>" ] && username_in=""
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password_in=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.password_in")
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[ "$password_in" == "<empty>" ] && password_in=""
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[ -n "$username_in" ] && userpwd_in_str=":$username_in:$password_in"
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netdev=$(/sbin/ip route get to ${tgt_ipaddr} | \
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sed 's|.*dev \(.*\).*|\1|g' | awk '{ print $1; exit }')
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kdump_setup_netdev $netdev
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# prepare netroot= command line
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# FIXME: IPV6 addresses require explicit [] around $tgt_ipaddr
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# FIXME: Do we need to parse and set other parameters like protocol, port
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# iscsi_iface_name, netdev_name, LUN etc.
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netroot_str="netroot=iscsi:${userpwd_str}${userpwd_in_str}@$tgt_ipaddr::::$tgt_name"
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[[ -f $netroot_conf ]] || touch $netroot_conf
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# If netroot target does not exist already, append.
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if ! grep -q $netroot_str $netroot_conf; then
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echo $netroot_str >> $netroot_conf
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dinfo "Appended $netroot_str to $netroot_conf"
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fi
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# Setup initator
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initiator_str=$(kdump_get_iscsi_initiator)
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[ $? -ne "0" ] && derror "Failed to get initiator name" && return 1
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# If initiator details do not exist already, append.
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if ! grep -q "$initiator_str" $netroot_conf; then
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echo "$initiator_str" >> $netroot_conf
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dinfo "Appended "$initiator_str" to $netroot_conf"
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fi
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}
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kdump_check_iscsi_targets () {
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# If our prerequisites are not met, fail anyways.
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type -P iscsistart >/dev/null || return 1
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kdump_check_setup_iscsi() (
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local _dev
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_dev=$1
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[[ -L /sys/dev/block/$_dev ]] || return
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cd "$(readlink -f /sys/dev/block/$_dev)"
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until [[ -d sys || -d iscsi_session ]]; do
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cd ..
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done
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[[ -d iscsi_session ]] && kdump_setup_iscsi_device "$PWD"
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)
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[[ $hostonly ]] || [[ $mount_needs ]] && {
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for_each_host_dev_and_slaves_all kdump_check_setup_iscsi
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}
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}
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install() {
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kdump_install_conf
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if is_ssh_dump_target; then
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dracut_install /var/lib/random-seed || exit $?
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fi
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inst "$moddir/monitor_dd_progress" "/kdumpscripts/monitor_dd_progress"
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chmod +x ${initdir}/kdumpscripts/monitor_dd_progress
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inst "/bin/dd" "/bin/dd"
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inst "/bin/tail" "/bin/tail"
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inst "/bin/date" "/bin/date"
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inst "/bin/sync" "/bin/sync"
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inst "/bin/cut" "/bin/cut"
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inst "/sbin/makedumpfile" "/sbin/makedumpfile"
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inst "/sbin/vmcore-dmesg" "/sbin/vmcore-dmesg"
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inst_hook pre-pivot 9999 "$moddir/kdump.sh"
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# Check for all the devices and if any device is iscsi, bring up iscsi
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# target. Ideally all this should be pushed into dracut iscsi module
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# at some point of time.
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kdump_check_iscsi_targets
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}
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