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ctdb-tools: Add standalone ctdb_natgw tool script
This is intended to replace the use of "ctdb natgwlist" in 11.natgw and provide different views of the NAT gateway status. It replaces the use of CTDB_NATGW_SLAVE_ONLY=yes with a "slave-only" keyword in the NAT gateway nodes file. This means the nodes file must be consistent on all nodes in a NAT gateway group. Note that this script is not yet integrated, so there are no behaviour or documentation changes. Signed-off-by: Martin Schwenke <martin@meltin.net> Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This commit is contained in:
Martin Schwenke
Amitay Isaacs
parent
d71f747f5c
commit
1538fc4585
@ -203,6 +203,7 @@ rm -rf $RPM_BUILD_ROOT
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%{_bindir}/ltdbtool
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%{_bindir}/ctdb_diagnostics
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%{_bindir}/onnode
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%{_bindir}/ctdb_natgw
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%dir %{_libdir}
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%{_libdir}/ctdb/lib*
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%{_libdir}/libtevent-unix-util.so.0*
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199
ctdb/tools/ctdb_natgw
Executable file
199
ctdb/tools/ctdb_natgw
Executable file
@ -0,0 +1,199 @@
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#!/bin/sh
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if [ -z "$CTDB_BASE" ] ; then
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export CTDB_BASE="/usr/local/etc/ctdb"
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fi
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. "${CTDB_BASE}/functions"
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loadconfig "ctdb"
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# Default NAT gateway nodes file location
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[ -n "$CTDB_NATGW_NODES" ] || CTDB_NATGW_NODES="${CTDB_BASE}/natgw_nodes"
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[ -n "$CTDB_SOCKET" ] && export CTDB_SOCKET
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############################################################
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usage ()
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{
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cat <<EOF
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$0 <option>
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<option> is one of:
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master Display node number and private IP address of master node
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list List private IP addresses of nodes in group, annotate master
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status Show status of nodes in NAT gateway group
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natgwlist Combination of "master" and "status", for backward compatiblity
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EOF
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exit 1
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}
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nodestatus_X=""
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# Fields are:
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# Node|IP|Disconnected|Banned|Disabled|Unhealthy|Stopped|Inactive|PartiallyOnline|ThisNode
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get_nodestatus_X ()
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{
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# Result is cached in global variable nodestatus_X
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[ -n "$nodestatus_X" ] || \
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nodestatus_X=$(ctdb -X nodestatus all |
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sed -e '1d' -e 's@^|@@' -e 's@|$@@')
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}
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get_nodestatus ()
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{
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# Result is cached in global variable nodestatus
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[ -n "$nodestatus" ] || nodestatus=$(ctdb nodestatus all)
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[ $? -ne 255 ] # ctdb nodestatus returns 255 on failure
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}
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get_natgw_nodes ()
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{
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# Result is cached in global variable natgw_nodes
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if [ -n "$natgw_nodes" ] ; then
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return
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fi
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if [ ! -r "$CTDB_NATGW_NODES" ] ; then
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return 1
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fi
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natgw_nodes=$(cat "$CTDB_NATGW_NODES") || return 1
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# Sanity check file contents here
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while read _ip _options ; do
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# Skip comments
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case "$_ip" in
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\#*) continue ;;
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esac
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case "$_options" in
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slave-only|"") : ;;
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*) die "${prog}: Invalid options \"${_options}\" in \"$CTDB_NATGW_NODES\""
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esac
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done <<EOF
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$natgw_nodes
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EOF
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return 0
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}
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# Print the PNN and IP address of the NAT gateway master node
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find_master ()
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{
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get_natgw_nodes || \
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die "${prog}: NAT gateway nodes file \"$CTDB_NATGW_NODES\" not found"
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get_nodestatus_X || \
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die "${prog}: Unable to get status of nodes"
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# $_ms is an @-delimited list of nodes that are allowed to be the master
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_ms="@"
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while read _ip _options ; do
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case "$_options" in
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"") _ms="${_ms}${_ip}@" ;;
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esac
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done <<EOF
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$natgw_nodes
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EOF
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# Now filter by $ms and by status of nodes...
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# Note that the 3 awk invocations below have "||" between them, so
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# the first to succeed will select the master node.
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# First try for a fully active and healthy node, so must not be
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# DISABLED, UNHEALTHY or INACTIVE (last covers DISCONNECTED,
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# BANNED or STOPPED)
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awk -F '|' -v ms="$_ms" \
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'BEGIN { ret = 2 }
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ms ~ "@" $2 "@" && \
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$5 == 0 && $6 == 0 && $8 == 0 { print $1, $2 ; ret=0 ; exit }
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END { exit ret }' <<EOF ||
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$nodestatus_X
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EOF
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# Not found? UNHEALTHY/BANNED will do, so node must not be
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# DISCONNECTED, DISABLED or STOPPED
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awk -F '|' -v ms="$_ms" \
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'BEGIN { ret = 2 }
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ms ~ "@" $2 "@" && \
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$3 == 0 && $5 == 0 && $7 == 0 { print $1, $2 ; ret=0 ; exit }
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END { exit ret }' <<EOF ||
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$nodestatus_X
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EOF
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# Not found? STOPPED will do, so node must not be DISCONNECTED or
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# DISABLED
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awk -F '|' -v ms="$_ms" \
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'BEGIN { ret = 2 }
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ms ~ "@" $2 "@" && \
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$3 == 0 && $5 == 0 { print $1, $2 ; ret=0 ; exit }
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END { exit ret }' <<EOF
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$nodestatus_X
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EOF
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}
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# List all nodes in the NAT gateway group, annotating the master node
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nodes_list ()
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{
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get_natgw_nodes || \
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die "${prog}: NAT gateway nodes file \"$CTDB_NATGW_NODES\" not found"
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set -- $(find_master) || \
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die "${prog}: Unable to determine NAT gateway master node"
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_master_ip="$2"
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# Annotate the master node
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while read _ip _options ; do
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if [ "$_ip" = "$_master_ip" ] ; then
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_options="MASTER${_options:+,}${_options}"
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fi
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printf "${_ip}\t${_options}\n"
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done <<EOF
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$natgw_nodes
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EOF
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}
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# Print the status of all nodes in the NAT gateway group, along with a count
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nodes_status ()
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{
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get_natgw_nodes || \
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die "${prog}: NAT gateway nodes file \"$CTDB_NATGW_NODES\" not found"
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get_nodestatus || \
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die "${prog}: Unable to get status of nodes"
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# $_ns is a @-delimited list of nodes in the NAT gateway group
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_ns="@"
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while read _ip _options ; do
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_ns="${_ns}${_ip}@"
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done <<EOF
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$natgw_nodes
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EOF
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# Print status of nodes in $_ns, along with node count
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awk -v ns="$_ns" \
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'BEGIN { out = "" ; count = 0 } \
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ns ~ "@" $2 "@" { out = out "\n" $0 ; count += 1 } \
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END { print "Number of nodes:" count out }' <<EOF
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$nodestatus
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EOF
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}
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# For backward compatibility
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natgwlist ()
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{
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ret=0
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find_master
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if [ $? -eq 2 ] ; then
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echo "-1 0.0.0.0"
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ret=2
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fi
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nodes_status || return $?
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return $ret
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}
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prog=$(basename "$0")
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cmd="$1"
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case "$cmd" in
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master) find_master ;;
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list) nodes_list ;;
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status) nodes_status ;;
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natgwlist) natgwlist ;;
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*) usage ;;
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esac
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@ -536,6 +536,13 @@ def build(bld):
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bld.INSTALL_FILES('${BINDIR}', 'ctdb_diagnostics',
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destname='ctdb_diagnostics', chmod=0755)
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bld.SAMBA_GENERATOR('ctdb-natgw',
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source='tools/ctdb_natgw',
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target='ctdb_natgw',
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rule='sed %s ${SRC} > ${TGT}' % (sed_cmdline))
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bld.INSTALL_FILES('${BINDIR}', 'ctdb_natgw',
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destname='ctdb_natgw', chmod=0755)
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bld.SAMBA_GENERATOR('ctdbd-wrapper',
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source='config/ctdbd_wrapper',
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target='ctdbd_wrapper',
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