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@mbaldessari
Last active September 12, 2017 15:20
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#!/bin/bash
# by Damien Ciabrini & Michele Baldessari
# This function takes the resource name as a parameter and returns
# "clone", "master", "primitive" or exits with 1
function get_resource_type() {
local clone_count
local master_count
local primitive_count
local bundle_count
local resource_name
resource_name=$1
clone_count=$(crm_mon -r --as-xml | xmllint --xpath "count(//resources/clone[@multi_state='false']/resource[@id='$resource_name']/@id)" -)
master_count=$(crm_mon -r --as-xml | xmllint --xpath "count(//resources/clone[@multi_state='true']/resource[@id='$resource_name']/@id)" -)
primitive_count=$(crm_mon -r --as-xml | xmllint --xpath "count(//resources/resource[@id='$resource_name']/@id)" -)
bundle_count=$(crm_mon -r --as-xml | xmllint --xpath "count(//resources/bundle[@id='$resource_name']/@id)" -)
if [ $clone_count -gt 0 ]; then
echo "clone";
elif [ $master_count -gt 0 ]; then
echo "master";
elif [ $primitive_count -gt 0 ]; then
echo "primitive";
elif [ $bundle_count -gt 0 ]; then
echo "bundle"
else
echo "unrecognized resource type for $resource (c:$clone_count m:$master_count p:$primitive_count)"
exit 1
fi
}
# This function takes a resource name (the resource must be of master
# type) and returns the master-max attribute if present or 1 if the
# attribute is not present. It exists 1 in case of errors.
function get_master_max() {
local resource_name
local ret
local status
resource_name=$1
ret=$(crm_resource -r $resource_name --meta -g master-max 2>/dev/null)
status=$?
if [ $status -eq 0 ]; then
echo $ret
elif [ $status -eq 6 ]; then
echo 1
else
echo "Error fetching master max for $resource"
exit 1
fi
}
# This function takes a resource name which should be of type "clone"
# and returns the clone-max attribute if present. If clone-max is not
# present it returns the number of nodes which have the property
# "$resourcename-role" set to true (composable ha). If that number is
# 0 (pre-composable ha), we count the number of nodes in the cluster
# We return -1 in case of errors
function get_clone_count() {
local count
local resource_name
local ret
local rolename
local status
resource_name=$1
rolename="${resource_name}-role"
ret=$(crm_resource -r $resource_name --meta -g clone-max 2>/dev/null)
status=$?
if [ $status -eq 0 ]; then
echo $ret
elif [ $status -eq 6 ]; then
# if there are no $rolename properties it means we are in pre-composable HA and we need
# to use the number of corosync nodes
count=$(pcs property | grep -c "$rolename=true")
if [ $count = "0" ]; then
# FIXME what happens if pacemaker remote is configured
count=$(crm_node -l | wc -l)
echo $count
else
echo $count
fi
else
echo -1
fi
}
function get_bundle_replicas() {
cibadmin --query --xpath "//resources/bundle[@id='$1']/docker" | xmllint --xpath "string(/docker/@replicas)" -
}
function get_bundle_masters() {
cibadmin --query --xpath "//resources/bundle[@id='$1']/docker" | xmllint --xpath "string(/docker/@masters)" -
}
# Returns empty if the bundle has no primitive inside it (e.g. haproxy)
function get_bundle_primitive_name() {
cibadmin --query --xpath "//resources/bundle[@id='$1']" | xmllint --xpath "string(/bundle/primitive/@id)" -
}
function resource_active() {
echo "$1 is active"
exit 0
}
function resource_not_active() {
echo "$1 is inactive"
exit 0
}
# Takes the resource name as an argument and does the following:
# a) master/slave resources
# returns active only if the needed number of masters is set
# e.g. galera needs to be master on all nodes where galera is supposed
# to run (that is == to the number of controllers in pre-composable ha
# and the number of nodes with galera-role=true properties set
# in composable ha)
# redis will need to have master on only one node
# b) cloned resources
# returns active if the resource is started on the needed nodes
# e.g. same as master/slave resources the needed number of nodes is
# equal to the cluster nodes in pre-composable and to the haproxy-role
# property count in composable ha
# c) primitive resources
# returns active if the resource is started on one node
# e.g. A/P resources like cinder-volume, VIPs
function is_resource_active() {
local count
local master_max
local resource_name
local resource_type
local to_be_count
resource_name=$1
resource_type=$(get_resource_type $resource)
if [ $resource_type = "master" ]; then
master_max=$(get_master_max $resource)
count=$(crm_mon -r --as-xml | xmllint --xpath "count(//resource[@id='$resource_name' and @orphaned='false' and @failed='false' and @active='true' and @role='Master'])" -)
if [ $count -eq $master_max ]; then
resource_active $resource_name
else
resource_not_active $resource_name
fi
elif [ $resource_type = "clone" ]; then
to_be_count=$(get_clone_count $resource)
count=$(crm_mon -r --as-xml | xmllint --xpath "count(//resource[@id='$resource_name' and @orphaned='false' and @failed='false' and @active='true' and @role='Started'])" -)
if [ $to_be_count -eq $count ]; then
resource_active $resource_name
else
resource_not_active $resource_name
fi
elif [ $resource_type = "primitive" ]; then
count=$(crm_mon -r --as-xml | xmllint --xpath "count(//resource[@id='$resource_name' and @orphaned='false' and @failed='false' and @active='true' and @role='Started'])" -)
if [ $count -eq 1 ]; then
resource_active $resource_name
else
resource_not_active $resource_name
fi
elif [ $resource_type = "bundle" ]; then
# we check that count of replicas is the active number of bundles of the bundle
# if replicas == counted active bundles
# fetch the primitive inside the bundle
#if $(contains_primitive $resource_name); then
primitive_name=$(get_bundle_primitive_name $resource_name)
if [ ! -z "$primitive_name" ]; then
expected_count=$(get_bundle_masters $resource_name)
if [ ! -z "$expected_count" ]; then
# master/slave
count=$(crm_mon -r --as-xml | xmllint --xpath "count(//resource[@id='$primitive_name' and @orphaned='false' and @failed='false' and @active='true' and @role='Master'])" -)
if [ $count -eq $expected_count ]; then
resource_active $resource_name
else
resource_not_active $resource_name
fi
else
# clone
expected_count=$(get_bundle_replicas $resource_name)
count=$(crm_mon -r --as-xml | xmllint --xpath "count(//resource[@id='$primitive_name' and @orphaned='false' and @failed='false' and @active='true' and @role='Started'])" -)
if [ $count -eq $expected_count ]; then
resource_active $resource_name
else
resource_not_active $resource_name
fi
fi
else
# no primitive
expected_count=$(get_bundle_replicas $resource_name)
count=$(crm_mon -r --as-xml | xmllint --xpath "count(//bundle[@id='$resource_name']/replica/resource[@orphaned='false' and @failed='false' and @active='true' and @role='Started'])" -)
if [ $count -eq $expected_count ]; then
resource_active $resource_name
else
resource_not_active $resource_name
fi
fi
fi
}
resource=$1
is_resource_active $resource
@beekhof
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beekhof commented Mar 2, 2017

looks sane to me
you skipped groups, but we don't use them in OSP

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