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fix addon manager failing to elect leader on masters with _ in the hostname (issue #88214)

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This commit is contained in:
Oleg Chunikhin 2020-02-16 14:48:35 -05:00
parent 3d09d25292
commit a6739dbffc
1 changed files with 5 additions and 3 deletions
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8
cluster/addons/addon-manager/kube-addons.sh
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@ -210,13 +210,15 @@ function is_leader() {
# Disabling because "${KUBECTL_OPTS}" needs to allow for expansion here # Disabling because "${KUBECTL_OPTS}" needs to allow for expansion here
KUBE_CONTROLLER_MANAGER_LEADER=$(${KUBECTL} ${KUBECTL_OPTS} -n kube-system get ep kube-controller-manager \ KUBE_CONTROLLER_MANAGER_LEADER=$(${KUBECTL} ${KUBECTL_OPTS} -n kube-system get ep kube-controller-manager \
-o go-template=$'{{index .metadata.annotations "control-plane.alpha.kubernetes.io/leader"}}' \ -o go-template=$'{{index .metadata.annotations "control-plane.alpha.kubernetes.io/leader"}}' \
| sed 's/^.*"holderIdentity":"\([^"]*\)".*/\1/' | awk -F'_' '{print $1}') | sed 's/^.*"holderIdentity":"\([^"]*\)".*/\1/')
# If there was any problem with getting the leader election results, var will # If there was any problem with getting the leader election results, var will
# be empty. Since it's better to have multiple addon managers than no addon # be empty. Since it's better to have multiple addon managers than no addon
# managers at all, we're going to assume that we're the leader in such case. # managers at all, we're going to assume that we're the leader in such case.
log INFO "Leader is $KUBE_CONTROLLER_MANAGER_LEADER" log INFO "Leader is $KUBE_CONTROLLER_MANAGER_LEADER"
[[ "$KUBE_CONTROLLER_MANAGER_LEADER" == "" || # KUBE_CONTROLLER_MANAGER_LEADER value is in the form "${HOSTNAME}_*"
"$HOSTNAME" == "$KUBE_CONTROLLER_MANAGER_LEADER" ]] # Here we verify that the value is either empty or is in the expected form for the leader
KUBE_CONTROLLER_MANAGER_LEADER="${KUBE_CONTROLLER_MANAGER_LEADER##${HOSTNAME}_*}"
[[ "$KUBE_CONTROLLER_MANAGER_LEADER" == "" ]]
} }
# The business logic for whether a given object should be created # The business logic for whether a given object should be created