add k8s_cluster_id host label (#10588)
Ilya Mashchenko committed
Feb 12, 2021 at 11:40 UTC
067e3cfbba74e7f2be8583da92ace62fc3f2c460
1 file changed
+36
-13
daemon/get-kubernetes-labels.sh.in
+36
-13
@@ -2,17 +2,40 @@
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# Checks if netdata is running in a kubernetes pod and fetches that pod's labels
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-if [ -n "${KUBERNETES_SERVICE_HOST}" ] && [ -n "${KUBERNETES_PORT_443_TCP_PORT}" ] && [ -n "${MY_POD_NAMESPACE}" ] && [ -n "${MY_POD_NAME}" ]; then
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- if command -v jq >/dev/null 2>&1; then
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- KUBE_TOKEN="$(</var/run/secrets/kubernetes.io/serviceaccount/token)"
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- URL="https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_PORT_443_TCP_PORT/api/v1/namespaces/$MY_POD_NAMESPACE/pods/$MY_POD_NAME"
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- curl -sSk -H "Authorization: Bearer $KUBE_TOKEN" "$URL" |
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- jq -r '.metadata.labels' | grep ':' | tr -d '," '
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- exit 0
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- else
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- echo "jq command not available. Please install jq to get host labels for kubernetes pods."
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- exit 1
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- fi
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-else
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- exit 0
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+if [ -z "${KUBERNETES_SERVICE_HOST}" ] || [ -z "${KUBERNETES_PORT_443_TCP_PORT}" ] || [ -z "${MY_POD_NAMESPACE}" ] || [ -z "${MY_POD_NAME}" ]; then
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+ exit 0
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fi
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+
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+if ! command -v jq > /dev/null 2>&1; then
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+ echo "jq command not available. Please install jq to get host labels for kubernetes pods."
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+ exit 1
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+fi
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+
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+TOKEN="$(< /var/run/secrets/kubernetes.io/serviceaccount/token)"
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+HEADER="Authorization: Bearer $TOKEN"
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+HOST="$KUBERNETES_SERVICE_HOST:$KUBERNETES_PORT_443_TCP_PORT"
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+
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+URL="https://$HOST/api/v1/namespaces/$MY_POD_NAMESPACE/pods/$MY_POD_NAME"
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+if ! POD_DATA=$(curl -sSk -H "$HEADER" "$URL" 2>&1); then
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+ echo "error on curl '${URL}': ${POD_DATA}."
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+ exit 1
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+fi
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+
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+URL="https://$HOST/api/v1/namespaces/kube-system"
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+if ! KUBE_SYSTEM_NS_DATA=$(curl -sSk -H "$HEADER" "$URL" 2>&1); then
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+ echo "error on curl '${URL}': ${KUBE_SYSTEM_NS_DATA}."
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+ exit 1
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+fi
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+
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+if ! POD_LABELS=$(jq -r '.metadata.labels' <<< "$POD_DATA" | grep ':' | tr -d '," ' 2>&1); then
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+ echo "error on 'jq' parse pod data: ${POD_LABELS}."
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+ exit 1
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+fi
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+
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+if ! KUBE_SYSTEM_NS_UID=$(jq -r '.metadata.uid' <<< "$KUBE_SYSTEM_NS_DATA" 2>&1); then
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+ echo "error on 'jq' parse kube_system_ns: ${KUBE_SYSTEM_NS_UID}."
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+ exit 1
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+fi
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+
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+echo -e "$POD_LABELS\nk8s_cluster_id:$KUBE_SYSTEM_NS_UID"
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+exit 0