diff --git a/nagios/templates/bin/_nagios-readiness.sh.tpl b/nagios/templates/bin/_nagios-readiness.sh.tpl
new file mode 100644
index 000000000..9e50f36d9
--- /dev/null
+++ b/nagios/templates/bin/_nagios-readiness.sh.tpl
@@ -0,0 +1,27 @@
+#!/bin/bash
+
+{{/*
+Copyright 2019 The Openstack-Helm Authors.
+
+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.
+*/}}
+
+# NOTE(sw5822): Redirect no-op operator output to Nagios log file to clean out
+# Nagios's log file, since Nagios doesn't support logging to /dev/null
+: > /opt/nagios/var/log/nagios.log
+
+# Check whether Nagios endpoint is reachable
+reply=$(curl -s -o /dev/null -w %{http_code} http://127.0.0.1:8000/nagios)
+if [ \"$reply\" -lt 200 -o \"$reply\" -ge 400 ]; then
+  exit 1
+fi
diff --git a/nagios/templates/configmap-bin.yaml b/nagios/templates/configmap-bin.yaml
index db1ea00fe..759ed32fe 100644
--- a/nagios/templates/configmap-bin.yaml
+++ b/nagios/templates/configmap-bin.yaml
@@ -24,6 +24,8 @@ metadata:
 data:
   apache.sh: |
 {{ tuple "bin/_apache.sh.tpl" . | include "helm-toolkit.utils.template" | indent 4 }}
+  nagios-readiness.sh: |
+{{ tuple "bin/_nagios-readiness.sh.tpl" . | include "helm-toolkit.utils.template" | indent 4 }}
   image-repo-sync.sh: |+
 {{- include "helm-toolkit.scripts.image_repo_sync" . | indent 4 }}
 {{- end }}
diff --git a/nagios/templates/deployment.yaml b/nagios/templates/deployment.yaml
index 5e32f0e6d..6c16264a9 100644
--- a/nagios/templates/deployment.yaml
+++ b/nagios/templates/deployment.yaml
@@ -92,19 +92,6 @@ spec:
       {{- end }}
       initContainers:
 {{ tuple $envAll "nagios" list | include "helm-toolkit.snippets.kubernetes_entrypoint_init_container" | indent 8 }}
-        - name: nagios-log-ownership
-{{ tuple $envAll "nagios" | include "helm-toolkit.snippets.image" | indent 10 }}
-          securityContext:
-            runAsUser: 0
-          command:
-            - chown
-            - -R
-            - nagios:root
-            - /opt/nagios/var/log
-          volumeMounts:
-            - name: pod-var-log
-              mountPath: /opt/nagios/var/log
-              readOnly: false
       containers:
         - name: apache-proxy
 {{ tuple $envAll "apache_proxy" | include "helm-toolkit.snippets.image" | indent 10 }}
@@ -146,6 +133,12 @@ spec:
           ports:
             - name: nagios
               containerPort: {{ tuple "nagios" "internal" "nagios" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
+          readinessProbe:
+            exec:
+              command:
+                - /tmp/nagios-readiness.sh
+            initialDelaySeconds: 60
+            periodSeconds: 30
           env:
             - name: SNMP_NOTIF_PRIMARY_TARGET_WITH_PORT
               value: {{ $envAll.Values.conf.nagios.notification.snmp.primary_target }}
@@ -190,6 +183,10 @@ spec:
               mountPath: /opt/nagios/etc/nagios_objects.cfg
               subPath: nagios_objects.cfg
               readOnly: true
+            - name: nagios-bin
+              mountPath: /tmp/nagios-readiness.sh
+              subPath: nagios-readiness.sh
+              readOnly: true
 {{- if not (empty .Values.conf.nagios.query_es_clauses) }}
             - name: nagios-etc
               mountPath: /opt/nagios/etc/objects/query_es_clauses.json
@@ -198,11 +195,9 @@ spec:
 {{- end }}
             - name: pod-var-log
               mountPath: /opt/nagios/var/log
-              readOnly: false
       volumes:
         - name: pod-var-log
-          hostPath:
-            path: /opt/nagios/var/log
+          emptyDir: {}
         - name: nagios-etc
           secret:
             secretName: nagios-etc
diff --git a/nagios/values.yaml b/nagios/values.yaml
index 178708297..e6daf7609 100644
--- a/nagios/values.yaml
+++ b/nagios/values.yaml
@@ -1075,7 +1075,8 @@ conf:
       event_broker_options: -1
       log_rotation_method: d
       log_archive_path: /opt/nagios/var/log/archives
-      use_syslog: 1
+      use_syslog: 0
+      log_notifications: 0
       log_service_retries: 1
       log_host_retries: 1
       log_event_handlers: 1
@@ -1088,7 +1089,7 @@ conf:
       service_interleave_factor: s
       host_inter_check_delay_method: s
       max_host_check_spread: 30
-      max_concurrent_checks: 60
+      max_concurrent_checks: 300
       check_result_reaper_frequency: 10
       max_check_result_reaper_time: 30
       check_result_path: /opt/nagios/var/spool/checkresults