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local-up-cluster: warn about failing processes

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This helps developers detect when something went wrong and then also
points them in the right direction by showing where the corresponding
log file is, if there is one.

For example, since commit 43cb024402 in April 2017 kube-proxy failed
to start because featureGates was not set correctly in the .yaml file,
but no-one seems to have noticed this.
This commit is contained in:
Patrick Ohly 2018-03-01 09:56:20 +01:00
parent 426e4820bc
commit 9cf35f355b
1 changed files with 38 additions and 1 deletions
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39
hack/local-up-cluster.sh
View File

@ -386,6 +386,43 @@ cleanup()
exit 0
}
# Check if all processes are still running. Prints a warning once each time
# a process dies unexpectedly.
function healthcheck {
if [[ -n "${APISERVER_PID-}" ]] && ! sudo kill -0 ${APISERVER_PID} 2>/dev/null; then
warning "API server terminated unexpectedly, see ${APISERVER_LOG}"
APISERVER_PID=
fi
if [[ -n "${CTLRMGR_PID-}" ]] && ! sudo kill -0 ${CTLRMGR_PID} 2>/dev/null; then
warning "kube-controller-manager terminated unexpectedly, see ${CTLRMGR_LOG}"
CTLRMGR_PID=
fi
if [[ -n "$DOCKERIZE_KUBELET" ]]; then
# TODO (https://github.com/kubernetes/kubernetes/issues/62474): check health also in this case
:
elif [[ -n "${KUBELET_PID-}" ]] && ! sudo kill -0 ${KUBELET_PID} 2>/dev/null; then
warning "kubelet terminated unexpectedly, see ${KUBELET_LOG}"
KUBELET_PID=
fi
if [[ -n "${PROXY_PID-}" ]] && ! sudo kill -0 ${PROXY_PID} 2>/dev/null; then
warning "kube-proxy terminated unexpectedly, see ${PROXY_LOG}"
PROXY_PID=
fi
if [[ -n "${SCHEDULER_PID-}" ]] && ! sudo kill -0 ${SCHEDULER_PID} 2>/dev/null; then
warning "scheduler terminated unexpectedly, see ${SCHEDULER_LOG}"
SCHEDULER_PID=
fi
if [[ -n "${ETCD_PID-}" ]] && ! sudo kill -0 ${ETCD_PID} 2>/dev/null; then
warning "etcd terminated unexpectedly"
ETCD_PID=
fi
}
function warning {
message=$1
@ -1008,7 +1045,7 @@ fi
print_success
if [[ "${ENABLE_DAEMON}" = false ]]; then
while true; do sleep 1; done
while true; do sleep 1; healthcheck; done
fi
if [[ "${KUBETEST_IN_DOCKER:-}" == "true" ]]; then