Add solr docs

docs/examples/solr/autoscaler/combined.yaml

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+apiVersion: kubedb.com/v1alpha2
+kind: Solr
+metadata:
+  name: solr-combined
+  namespace: demo
+spec:
+  version: 9.6.1
+  replicas: 2
+  zookeeperRef:
+    name: zoo
+    namespace: demo
+  storage:
+    accessModes:
+      - ReadWriteOnce
+    resources:
+      requests:
+        storage: 1Gi
+    storageClassName: longhorn

docs/examples/solr/autoscaler/compute/combined-scaler.yaml

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+apiVersion: autoscaling.kubedb.com/v1alpha1
+kind: SolrAutoscaler
+metadata:
+  name: sl-node-autoscaler
+  namespace: demo
+spec:
+  databaseRef:
+    name: solr-combined
+  opsRequestOptions:
+    timeout: 5m
+    apply: IfReady
+  compute:
+    node:
+      trigger: "On"
+      podLifeTimeThreshold: 5m
+      resourceDiffPercentage: 5
+      minAllowed:
+        cpu: 1
+        memory: 2Gi
+      maxAllowed:
+        cpu: 2
+        memory: 3Gi
+      controlledResources: ["cpu", "memory"]
+      containerControlledValues: "RequestsAndLimits"

docs/examples/solr/autoscaler/compute/topology-scaler.yaml

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+apiVersion: autoscaling.kubedb.com/v1alpha1
+kind: SolrAutoscaler
+metadata:
+  name: sl-data-autoscaler
+  namespace: demo
+spec:
+  databaseRef:
+    name: solr-cluster
+  opsRequestOptions:
+    timeout: 5m
+    apply: IfReady
+  compute:
+    data:
+      trigger: "On"
+      podLifeTimeThreshold: 5m
+      resourceDiffPercentage: 5
+      minAllowed:
+        cpu: 1
+        memory: 2.5Gi
+      maxAllowed:
+        cpu: 2
+        memory: 3Gi
+      controlledResources: ["cpu", "memory"]
+      containerControlledValues: "RequestsAndLimits"

docs/examples/solr/autoscaler/storage/combined-scaler.yaml

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+apiVersion: autoscaling.kubedb.com/v1alpha1
+kind: SolrAutoscaler
+metadata:
+  name: sl-storage-autoscaler-combined
+  namespace: demo
+spec:
+  databaseRef:
+    name: solr-combined
+  storage:
+    node:
+      expansionMode: "Offline"
+      trigger: "On"
+      usageThreshold: 60
+      scalingThreshold: 100

docs/examples/solr/autoscaler/storage/topoology-scaler.yaml

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+apiVersion: autoscaling.kubedb.com/v1alpha1
+kind: SolrAutoscaler
+metadata:
+  name: sl-storage-autoscaler-topology
+  namespace: demo
+spec:
+  databaseRef:
+    name: solr-cluster
+  storage:
+    data:
+      expansionMode: "Offline"
+      trigger: "On"
+      usageThreshold: 60
+      scalingThreshold: 100

docs/examples/solr/autoscaler/topology.yaml

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+apiVersion: kubedb.com/v1alpha2
+kind: Solr
+metadata:
+  name: solr-cluster
+  namespace: demo
+spec:
+  version: 9.6.1
+  zookeeperRef:
+    name: zoo
+    namespace: demo
+  topology:
+    overseer:
+      replicas: 1
+      storage:
+        storageClassName: longhorn
+        accessModes:
+          - ReadWriteOnce
+        resources:
+          requests:
+            storage: 1Gi
+    data:
+      replicas: 1
+      storage:
+        storageClassName: longhorn
+        accessModes:
+          - ReadWriteOnce
+        resources:
+          requests:
+            storage: 1Gi
+    coordinator:
+      storage:
+        storageClassName: longhorn
+        accessModes:
+          - ReadWriteOnce
+        resources:
+          requests:
+            storage: 1Gi

docs/examples/solr/configuration/sl-custom-config.yaml

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+apiVersion: v1
+kind: Secret
+metadata:
+  name: sl-custom-config
+  namespace: demo
+stringData:
+  "solr.xml": |
+    <solr>
+      <int name="maxBooleanClauses">${solr.max.booleanClauses:2024}</int>
+      <backup>
+        <repository name="kubedb-proxy-s3" class="org.apache.solr.s3.S3BackupRepository">
+          <str name="s3.bucket.name">solrbackup</str>
+          <str name="s3.region">us-east-1</str>
+          <str name="s3.endpoint">http://s3proxy-s3.demo.svc:80</str>
+        </repository>
+      </backup>
+    </solr>

docs/examples/solr/configuration/sl-custom-nodeselector.yaml

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+apiVersion: kubedb.com/v1alpha2
+kind: Solr
+metadata:
+  name: solr-custom-nodeselector
+  namespace: demo
+spec:
+  version: 9.6.1
+  replicas: 2
+  podTemplate:
+    spec:
+      nodeSelector:
+        topology.gke.io/zone: us-central1-b
+  zookeeperRef:
+    name: zoo
+    namespace: demo
+  storage:
+    accessModes:
+      - ReadWriteOnce
+    resources:
+      requests:
+        storage: 1Gi

docs/examples/solr/configuration/sl-custom-podtemplate.yaml

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+apiVersion: kubedb.com/v1alpha2
+kind: Solr
+metadata:
+  name: solr-misc-config
+  namespace: demo
+spec:
+  version: "9.6.1"
+  zookeeperRef:
+    name: zoo
+    namespace: demo
+  topology:
+    data:
+      replicas: 1
+      podTemplate:
+        spec:
+          containers:
+            - name: "solr"
+              resources:
+                requests:
+                  cpu: "900m"
+                limits:
+                  cpu: "900m"
+                  memory: "2.5Gi"
+      storage:
+        accessModes:
+          - ReadWriteOnce
+        resources:
+          requests:
+            storage: 1Gi
+        storageClassName: standard
+    overseer:
+      replicas: 1
+      podTemplate:
+        spec:
+          containers:
+            - name: "solr"
+              resources:
+                requests:
+                  cpu: "900m"
+                limits:
+                  cpu: "900m"
+                  memory: "2.5Gi"
+      storage:
+        accessModes:
+          - ReadWriteOnce
+        resources:
+          requests:
+            storage: 1Gi
+        storageClassName: standard
+    coordinator:
+      replicas: 1
+      podTemplate:
+        spec:
+          containers:
+            - name: "solr"
+              resources:
+                requests:
+                  cpu: "900m"
+                limits:
+                  cpu: "900m"
+                  memory: "2.5Gi"
+      storage:
+        accessModes:
+          - ReadWriteOnce
+        resources:
+          requests:
+            storage: 1Gi
+        storageClassName: standard

docs/examples/solr/configuration/solr-combined.yaml

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+apiVersion: kubedb.com/v1alpha2
+kind: Solr
+metadata:
+  name: solr
+  namespace: demo
+spec:
+  configSecret:
+    name: sl-combined-custom-config
+  version: 9.6.1
+  replicas: 2
+  zookeeperRef:
+    name: zoo
+    namespace: demo
+  storage:
+    accessModes:
+      - ReadWriteOnce
+    resources:
+      requests:
+        storage: 1Gi
+    storageClassName: longhorn

docs/examples/solr/configuration/solr-with-tolerations.yaml

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+apiVersion: kubedb.com/v1alpha2
+kind: Solr
+metadata:
+  name: solr-with-toleration
+  namespace: demo
+spec:
+  version: 9.6.1
+  replicas: 2
+  podTemplate:
+    spec:
+      tolerations:
+        - key: "key1"
+          operator: "Equal"
+          value: "node7"
+          effect: "NoSchedule"
+        - key: "key1"
+          operator: "Equal"
+          value: "node8"
+          effect: "NoSchedule"
+  zookeeperRef:
+    name: zoo
+    namespace: demo
+  storage:
+    accessModes:
+      - ReadWriteOnce
+    resources:
+      requests:
+        storage: 1Gi

docs/examples/solr/configuration/solr-without-toleration.yaml

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+apiVersion: kubedb.com/v1alpha2
+kind: Solr
+metadata:
+  name: solr-without-toleration
+  namespace: demo
+spec:
+  version: 9.6.1
+  replicas: 2
+  zookeeperRef:
+    name: zoo
+    namespace: demo
+  storage:
+    accessModes:
+      - ReadWriteOnce
+    resources:
+      requests:
+        storage: 1Gi

docs/examples/solr/monitoring/solr-builtin.yaml

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+apiVersion: kubedb.com/v1alpha2
+kind: Solr
+metadata:
+  name: builtin-prom-sl
+  namespace: demo
+spec:
+  version: 9.6.1
+  replicas: 2
+  enableSSL: true
+  monitor:
+    agent: prometheus.io/builtin
+  solrModules:
+    - prometheus-exporter
+  zookeeperRef:
+    name: zoo
+    namespace: demo
+  storage:
+    accessModes:
+      - ReadWriteOnce
+    resources:
+      requests:
+        storage: 1Gi
+    storageClassName: standard

docs/examples/solr/monitoring/solr-operator.yaml

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+apiVersion: kubedb.com/v1alpha2
+kind: Solr
+metadata:
+  name: operator-prom-sl
+  namespace: demo
+spec:
+  version: 9.6.1
+  replicas: 2
+  monitor:
+    agent: prometheus.io/operator
+    prometheus:
+      serviceMonitor:
+        labels:
+          release: prometheus
+        interval: 10s
+  solrModules:
+    - s3-repository
+    - gcs-repository
+    - prometheus-exporter
+  zookeeperRef:
+    name: zoo
+    namespace: demo
+  storage:
+    accessModes:
+      - ReadWriteOnce
+    resources:
+      requests:
+        storage: 1Gi
+    storageClassName: standard