1 files changed, 119 insertions, 0 deletions
diff --git a/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/helm/PodStatusValidator.java b/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/helm/PodStatusValidator.java
new file mode 100644
index 000000000..f8b08a6be
--- /dev/null
+++ b/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/helm/PodStatusValidator.java
@@ -0,0 +1,119 @@
+/*-
+ * ========================LICENSE_START=================================
+ * Copyright (C) 2021 Nordix Foundation. All rights reserved.
+ * ======================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================LICENSE_END===================================
+ */
+
+package org.onap.policy.clamp.acm.participant.kubernetes.helm;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.lang.invoke.MethodHandles;
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+import java.util.Map;
+import lombok.SneakyThrows;
+import org.apache.commons.io.IOUtils;
+import org.onap.policy.clamp.acm.participant.kubernetes.exception.ServiceException;
+import org.onap.policy.clamp.acm.participant.kubernetes.handler.AutomationCompositionElementHandler;
+import org.onap.policy.clamp.acm.participant.kubernetes.models.ChartInfo;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+public class PodStatusValidator implements Runnable {
+
+    private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+
+    private final int statusCheckInterval;
+
+    //Timeout for the thread to exit.
+    private final int timeout;
+
+    private ChartInfo chart;
+
+    /**
+     * Constructor for PodStatusValidator.
+     * @param chart chartInfo
+     * @param timeout timeout for the thread to exit
+     * @param statusCheckInterval Interval to check pod status
+     */
+    public PodStatusValidator(ChartInfo chart, int timeout, int statusCheckInterval) {
+        this.chart = chart;
+        this.timeout = timeout;
+        this.statusCheckInterval = statusCheckInterval;
+    }
+
+
+    @SneakyThrows
+    @Override
+    public void run() {
+        logger.info("Polling the status of deployed pods for the chart {}", chart.getChartId().getName());
+        Map<String, String> podStatusMap;
+        String output = null;
+        var isVerified = false;
+        long endTime = System.currentTimeMillis() + (timeout * 1000L);
+
+        while (!isVerified && System.currentTimeMillis() < endTime) {
+            try {
+                output = HelmClient.executeCommand(verifyPodStatusCommand(chart));
+                podStatusMap = mapPodStatus(output);
+                isVerified = podStatusMap.values()
+                    .stream()
+                    .allMatch("Running"::equals);
+                if (! isVerified) {
+                    logger.info("Waiting for the pods to be active for the chart {}", chart.getChartId().getName());
+                    podStatusMap.forEach((key, value) -> logger.info("Pod: {} , state: {}", key, value));
+                    AutomationCompositionElementHandler.getPodStatusMap().put(chart.getReleaseName(), podStatusMap);
+                    // Recheck status of pods in specific intervals.
+                    Thread.sleep(statusCheckInterval * 1000L);
+                } else {
+                    logger.info("All pods are in running state for the helm chart {}", chart.getChartId().getName());
+                    AutomationCompositionElementHandler.getPodStatusMap().put(chart.getReleaseName(), podStatusMap);
+                }
+            } catch (ServiceException | IOException  e) {
+                throw new ServiceException("Error verifying the status of the pod. Exiting", e);
+            }
+        }
+    }
+
+    private ProcessBuilder verifyPodStatusCommand(ChartInfo chart) {
+        String podName = chart.getReleaseName() + "-" + chart.getChartId().getName();
+        String cmd = "kubectl get pods --namespace " +  chart.getNamespace() + " | grep " + podName;
+        return new ProcessBuilder("sh", "-c", cmd);
+    }
+
+
+    private Map<String, String> mapPodStatus(String output) throws IOException, ServiceException {
+        Map<String, String> podStatusMap = new HashMap<>();
+        try (var reader = new BufferedReader(new InputStreamReader(IOUtils.toInputStream(output,
+            StandardCharsets.UTF_8)))) {
+            var line = reader.readLine();
+            while (line != null) {
+                if (line.contains(chart.getChartId().getName())) {
+                    var result = line.split("\\s+");
+                    podStatusMap.put(result[0], result[2]);
+                }
+                line = reader.readLine();
+            }
+        }
+        if (!podStatusMap.isEmpty()) {
+            return podStatusMap;
+        } else {
+            throw new ServiceException("Status of Pod is empty");
+        }
+    }
+}