Update sources with new SSPL+Elastic-2.0 license headers

As per the new licensing change for Elasticsearch and Kibana this commit
moves existing Apache 2.0 licensed source code to the new dual license
SSPL+Elastic license 2.0. In addition, existing x-pack code now uses
the new version 2.0 of the Elastic license. Full changes include:

- Updating LICENSE and NOTICE files throughout the code base, as well
  as those packaged in our published artifacts
- Update IDE integration to now use the new license header on newly
  created source files
- Remove references to the "OSS" distribution from our documentation
- Update build time verification checks to no longer allow Apache 2.0
  license header in Elasticsearch source code
- Replace all existing Apache 2.0 license headers for non-xpack code
  with updated header (vendored code with Apache 2.0 headers obviously
  remains the same).
- Replace all Elastic license 1.0 headers with new 2.0 header in xpack.

CONTRIBUTING.md

@@ -268,34 +268,24 @@ top-level `x-pack` directory, all contributed code should have the following
 license header unless instructed otherwise:
 
     /*
-     * Licensed to Elasticsearch under one or more contributor
-     * license agreements. See the NOTICE file distributed with
-     * this work for additional information regarding copyright
-     * ownership. Elasticsearch licenses this file to you 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.
+     * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+     * or more contributor license agreements. Licensed under the Elastic License
+     * 2.0 and the Server Side Public License, v 1; you may not use this file except
+     * in compliance with, at your election, the Elastic License 2.0 or the Server
+     * Side Public License, v 1.
      */
 
 The top-level `x-pack` directory contains code covered by the [Elastic
-license](licenses/ELASTIC-LICENSE.txt). Community contributions to this code are
+license](licenses/ELASTIC-LICENSE-2.0.txt). Community contributions to this code are
 welcome, and should have the following license header unless instructed
 otherwise:
 
     /*
      * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
-     * or more contributor license agreements. Licensed under the Elastic License;
-     * you may not use this file except in compliance with the Elastic License.
-     */
+     * or more contributor license agreements. Licensed under the Elastic License
+     * 2.0; you may not use this file except in compliance with the Elastic License
+     * 2.0.
+*/
 
 It is important that the only code covered by the Elastic licence is contained
 within the top-level `x-pack` directory. The build will fail its pre-commit

LICENSE.txt

@@ -1,10 +1,7 @@
-Source code in this repository is covered by one of three licenses: (i) the
-Apache License 2.0 (ii) an Apache License 2.0 compatible license (iii) the
-Elastic License. The default license throughout the repository is Apache License
-2.0 unless the header specifies another license. Elastic Licensed code is found
-only in the x-pack directory.
-
-The build produces two sets of binaries - one set that falls under the Elastic
-License and another set that falls under Apache License 2.0. The binaries that
-contain `-oss` in the artifact name are licensed under Apache License 2.0 and
-these binaries do not package any code from the x-pack directory.
+Source code in this repository is covered by (i) a dual license under the Server
+Side Public License, v 1 and the Elastic License 2.0 or (ii) an Apache License
+2.0 compatible license or (iii) solely under the Elastic License 2.0, in each
+case, as noted in the applicable header. The default throughout the repository
+is a dual license under the Server Side Public License, v 1 and the Elastic
+License 2.0, unless the header specifies another license. Code that is licensed
+solely under the Elastic License 2.0 is found only in the x-pack folder.

NOTICE.txt

@@ -1,5 +1,5 @@
 Elasticsearch
-Copyright 2009-2018 Elasticsearch
+Copyright 2009-2021 Elasticsearch
 
 This product includes software developed by The Apache Software
 Foundation (http://www.apache.org/).

Vagrantfile

@@ -4,22 +4,11 @@
 # This Vagrantfile exists to test packaging. Read more about its use in the
 # vagrant section in TESTING.asciidoc.
 
-# Licensed to Elasticsearch under one or more contributor
-# license agreements. See the NOTICE file distributed with
-# this work for additional information regarding copyright
-# ownership. Elasticsearch licenses this file to you 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.
+# Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+# or more contributor license agreements. Licensed under the Elastic License
+# 2.0 and the Server Side Public License, v 1; you may not use this file except
+# in compliance with, at your election, the Elastic License 2.0 or the Server
+# Side Public License, v 1.
 
 define_opts = {
   autostart: false

benchmarks/build.gradle

@@ -1,22 +1,11 @@
 import org.elasticsearch.gradle.info.BuildParams
 
 /*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 
 apply plugin: 'elasticsearch.build'

benchmarks/src/main/java/org/elasticsearch/benchmark/fs/AvailableIndexFoldersBenchmark.java

@@ -1,20 +1,9 @@
 /*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 package org.elasticsearch.benchmark.fs;
 

benchmarks/src/main/java/org/elasticsearch/benchmark/indices/breaker/MemoryStatsBenchmark.java

@@ -1,20 +1,9 @@
 /*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 package org.elasticsearch.benchmark.indices.breaker;
 

benchmarks/src/main/java/org/elasticsearch/benchmark/routing/allocation/AllocationBenchmark.java

@@ -1,20 +1,9 @@
 /*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 package org.elasticsearch.benchmark.routing.allocation;
 

benchmarks/src/main/java/org/elasticsearch/benchmark/routing/allocation/Allocators.java

@@ -1,20 +1,9 @@
 /*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 package org.elasticsearch.benchmark.routing.allocation;
 

benchmarks/src/main/java/org/elasticsearch/benchmark/search/aggregations/AggConstructionContentionBenchmark.java

@@ -1,20 +1,9 @@
 /*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 
 package org.elasticsearch.benchmark.search.aggregations;

benchmarks/src/main/java/org/elasticsearch/benchmark/search/aggregations/TermsReduceBenchmark.java

@@ -1,20 +1,9 @@
 /*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 package org.elasticsearch.benchmark.search.aggregations;
 

benchmarks/src/main/java/org/elasticsearch/benchmark/search/aggregations/bucket/terms/LongKeyedBucketOrdsBenchmark.java

@@ -1,20 +1,9 @@
 /*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 
 package org.elasticsearch.benchmark.search.aggregations.bucket.terms;

benchmarks/src/main/java/org/elasticsearch/benchmark/search/aggregations/bucket/terms/StringTermsSerializationBenchmark.java

@@ -1,20 +1,9 @@
 /*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 
 package org.elasticsearch.benchmark.search.aggregations.bucket.terms;

benchmarks/src/main/java/org/elasticsearch/benchmark/time/DateFormatterBenchmark.java

@@ -1,20 +1,9 @@
 /*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 package org.elasticsearch.benchmark.time;
 

benchmarks/src/main/java/org/elasticsearch/benchmark/time/DateFormatterFromBenchmark.java

@@ -1,20 +1,9 @@
 /*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 package org.elasticsearch.benchmark.time;