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refact: gather-monitoring by Prometheus replica #22

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refact: gather-monitoring by Prometheus replica #22

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48 changes: 27 additions & 21 deletions collection-scripts/gather_monitoring
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Original file line number Diff line number Diff line change
Expand Up @@ -12,10 +12,6 @@ declare -r CA_BUNDLE="${MONITORING_PATH}/ca-bundle.crt"
init() {
mkdir -p "${MONITORING_PATH}"

PROMETHEUS_ROUTE="$(oc get routes \
-n openshift-monitoring prometheus-k8s \
-o jsonpath='{.status.ingress[0].host}')"

ALERT_MANAGER_ROUTE="$(oc get routes \
-n openshift-monitoring alertmanager-main \
-o jsonpath='{.status.ingress[0].host}')"
Expand All @@ -34,20 +30,36 @@ cleanup() {
rm "$CA_BUNDLE"
}

prom_get() {
prom_get_by_replica() {
local replica="$1"; shift
local object="$1"; shift
local path="$1"; shift

local result_path="$MONITORING_PATH/prometheus/$path"
mkdir -p "$(dirname "$result_path")"
local result_path="${MONITORING_PATH}/prometheus/${path}"
mkdir -p "$(dirname "${result_path}")"

oc get \
--certificate-authority="$CA_BUNDLE" \
--token="${SA_TOKEN}" \
--server="https://$PROMETHEUS_ROUTE" \
--raw="/api/v1/$object" \
> "$result_path.json" \
2> "$result_path.stderr"
oc --insecure-skip-tls-verify exec pod/${replica} \
-c prometheus \
-n openshift-monitoring \
-- /bin/bash -c "curl -sG http://localhost:9090/api/v1/${object}" \
> "${result_path}.json" \
2> "${result_path}.stderr"
}

prometheus_gather_by_replica(){
echo "Collecting metrics for each replica..."
local pods="$(oc get pods -n openshift-monitoring -l prometheus=k8s -o jsonpath='{.items[*].metadata.name}')"

echo "Replicas found: $pods"
for POD in ${pods}; do
prom_get_by_replica ${POD} rules ${POD}/rules || true
prom_get_by_replica ${POD} alertmanagers ${POD}/alertmanagers || true
prom_get_by_replica ${POD} status/config ${POD}/status/config || true
prom_get_by_replica ${POD} status/flags ${POD}/status/flags || true
prom_get_by_replica ${POD} status/runtimeinfo ${POD}/status/runtimeinfo || true
prom_get_by_replica ${POD} status/buildinfo ${POD}/status/buildinfo || true
prom_get_by_replica ${POD} status/tsdb ${POD}/status/tsdb || true
done
}

alertmanager_get() {
Expand All @@ -66,19 +78,13 @@ alertmanager_get() {
2> "$result_path.stderr"
}


monitoring_gather(){
init

# begin gathering
# NOTE || true ignores failures

prom_get rules rules || true
prom_get alertmanagers alertmanagers || true
prom_get status/config status/config || true
prom_get status/flags status/flags || true
prom_get status/runtimeinfo status/runtimeinfo || true
prom_get status/tsdb status/tsdb || true
prometheus_gather_by_replica || true

alertmanager_get status status || true

Expand Down