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Merge pull request #21328 from zvonand/docs_kerberos_support

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Adding documentation for Kerberos external authenticator.
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Vitaly Baranov 2021-03-23 17:34:47 +03:00 committed by GitHub
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# CMake in ClickHouse
## TL; DR How to make ClickHouse compile and link faster?
Developer only! This command will likely fulfill most of your needs. Run before calling `ninja`.
```cmake
cmake .. \
-DCMAKE_C_COMPILER=/bin/clang-10 \
-DCMAKE_CXX_COMPILER=/bin/clang++-10 \
-DCMAKE_BUILD_TYPE=Debug \
-DENABLE_CLICKHOUSE_ALL=OFF \
-DENABLE_CLICKHOUSE_SERVER=ON \
-DENABLE_CLICKHOUSE_CLIENT=ON \
-DUSE_STATIC_LIBRARIES=OFF \
-DSPLIT_SHARED_LIBRARIES=ON \
-DENABLE_LIBRARIES=OFF \
-DUSE_UNWIND=ON \
-DENABLE_UTILS=OFF \
-DENABLE_TESTS=OFF
```
## CMake files types
1. ClickHouse's source CMake files (located in the root directory and in `/src`).
2. Arch-dependent CMake files (located in `/cmake/*os_name*`).
3. Libraries finders (search for contrib libraries, located in `/cmake/find`).
3. Contrib build CMake files (used instead of libraries' own CMake files, located in `/cmake/modules`)
## List of CMake flags
* This list is auto-generated by [this Python script](https://github.com/clickhouse/clickhouse/blob/master/docs/tools/cmake_in_clickhouse_generator.py).
* The flag name is a link to its position in the code.
* If an option's default value is itself an option, it's also a link to its position in this list.
### ClickHouse modes
| Name | Default value | Description | Comment |
|------|---------------|-------------|---------|
| <a name="enable-clickhouse-all"></a>[`ENABLE_CLICKHOUSE_ALL`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L8) | `ON` | Enable all ClickHouse modes by default | The `clickhouse` binary is a multi purpose tool that contains multiple execution modes (client, server, etc.), each of them may be built and linked as a separate library. If you do not know what modes you need, turn this option OFF and enable SERVER and CLIENT only. |
| <a name="enable-clickhouse-benchmark"></a>[`ENABLE_CLICKHOUSE_BENCHMARK`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L18) | `ENABLE_CLICKHOUSE_ALL` | Queries benchmarking mode | https://clickhouse.tech/docs/en/operations/utilities/clickhouse-benchmark/ |
| <a name="enable-clickhouse-client"></a>[`ENABLE_CLICKHOUSE_CLIENT`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L11) | `ENABLE_CLICKHOUSE_ALL` | Client mode (interactive tui/shell that connects to the server) | |
| <a name="enable-clickhouse-compressor"></a>[`ENABLE_CLICKHOUSE_COMPRESSOR`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L23) | `ENABLE_CLICKHOUSE_ALL` | Data compressor and decompressor | https://clickhouse.tech/docs/en/operations/utilities/clickhouse-compressor/ |
| <a name="enable-clickhouse-copier"></a>[`ENABLE_CLICKHOUSE_COPIER`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L26) | `ENABLE_CLICKHOUSE_ALL` | Inter-cluster data copying mode | https://clickhouse.tech/docs/en/operations/utilities/clickhouse-copier/ |
| <a name="enable-clickhouse-extract-from-config"></a>[`ENABLE_CLICKHOUSE_EXTRACT_FROM_CONFIG`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L20) | `ENABLE_CLICKHOUSE_ALL` | Configs processor (extract values etc.) | |
| <a name="enable-clickhouse-format"></a>[`ENABLE_CLICKHOUSE_FORMAT`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L28) | `ENABLE_CLICKHOUSE_ALL` | Queries pretty-printer and formatter with syntax highlighting | |
| <a name="enable-clickhouse-git-import"></a>[`ENABLE_CLICKHOUSE_GIT_IMPORT`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L40) | `ENABLE_CLICKHOUSE_ALL` | A tool to analyze Git repositories | https://presentations.clickhouse.tech/matemarketing_2020/ |
| <a name="enable-clickhouse-install"></a>[`ENABLE_CLICKHOUSE_INSTALL`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L44) | `OFF` | Install ClickHouse without .deb/.rpm/.tgz packages (having the binary only) | |
| <a name="enable-clickhouse-local"></a>[`ENABLE_CLICKHOUSE_LOCAL`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L15) | `ENABLE_CLICKHOUSE_ALL` | Local files fast processing mode | https://clickhouse.tech/docs/en/operations/utilities/clickhouse-local/ |
| <a name="enable-clickhouse-obfuscator"></a>[`ENABLE_CLICKHOUSE_OBFUSCATOR`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L32) | `ENABLE_CLICKHOUSE_ALL` | Table data obfuscator (convert real data to benchmark-ready one) | https://clickhouse.tech/docs/en/operations/utilities/clickhouse-obfuscator/ |
| <a name="enable-clickhouse-odbc-bridge"></a>[`ENABLE_CLICKHOUSE_ODBC_BRIDGE`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L36) | `ENABLE_CLICKHOUSE_ALL` | HTTP-server working like a proxy to ODBC driver | https://clickhouse.tech/docs/en/operations/utilities/odbc-bridge/ |
| <a name="enable-clickhouse-server"></a>[`ENABLE_CLICKHOUSE_SERVER`](https://github.com/clickhouse/clickhouse/blob/master/programs/CMakeLists.txt#L10) | `ENABLE_CLICKHOUSE_ALL` | Server mode (main mode) | |
### External libraries
Note that ClickHouse uses forks of these libraries, see https://github.com/ClickHouse-Extras.
| Name | Default value | Description | Comment |
|------|---------------|-------------|---------|
| <a name="enable-amqpcpp"></a>[`ENABLE_AMQPCPP`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/amqpcpp.cmake#L1) | `ENABLE_LIBRARIES` | Enalbe AMQP-CPP | |
| <a name="enable-avro"></a>[`ENABLE_AVRO`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/avro.cmake#L2) | `ENABLE_LIBRARIES` | Enable Avro | Needed when using Apache Avro serialization format |
| <a name="enable-base"></a>[`ENABLE_BASE64`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/base64.cmake#L1) | `ENABLE_LIBRARIES` | Enable base64 | |
| <a name="enable-brotli"></a>[`ENABLE_BROTLI`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/brotli.cmake#L1) | `ENABLE_LIBRARIES` | Enable brotli | |
| <a name="enable-capnp"></a>[`ENABLE_CAPNP`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/capnp.cmake#L1) | `ENABLE_LIBRARIES` | Enable Cap'n Proto | |
| <a name="enable-cassandra"></a>[`ENABLE_CASSANDRA`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/cassandra.cmake#L1) | `ENABLE_LIBRARIES` | Enable Cassandra | |
| <a name="enable-ccache"></a>[`ENABLE_CCACHE`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/ccache.cmake#L22) | `ENABLE_CCACHE_BY_DEFAULT` | Speedup re-compilations using ccache (external tool) | https://ccache.dev/ |
| <a name="enable-clang-tidy"></a>[`ENABLE_CLANG_TIDY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/analysis.cmake#L2) | `OFF` | Use clang-tidy static analyzer | https://clang.llvm.org/extra/clang-tidy/ |
| <a name="enable-curl"></a>[`ENABLE_CURL`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/curl.cmake#L1) | `ENABLE_LIBRARIES` | Enable curl | |
| <a name="enable-embedded-compiler"></a>[`ENABLE_EMBEDDED_COMPILER`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/llvm.cmake#L5) | `ENABLE_LIBRARIES` | Set to TRUE to enable support for 'compile_expressions' option for query execution | |
| <a name="enable-fastops"></a>[`ENABLE_FASTOPS`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/fastops.cmake#L2) | `ENABLE_LIBRARIES` | Enable fast vectorized mathematical functions library by Mikhail Parakhin | |
| <a name="enable-gperf"></a>[`ENABLE_GPERF`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/gperf.cmake#L5) | `ENABLE_LIBRARIES` | Use gperf function hash generator tool | |
| <a name="enable-grpc"></a>[`ENABLE_GRPC`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/grpc.cmake#L8) | `ENABLE_GRPC_DEFAULT` | Use gRPC | |
| <a name="enable-gsasl-library"></a>[`ENABLE_GSASL_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/libgsasl.cmake#L1) | `ENABLE_LIBRARIES` | Enable gsasl library | |
| <a name="enable-h"></a>[`ENABLE_H3`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/h3.cmake#L1) | `ENABLE_LIBRARIES` | Enable H3 | |
| <a name="enable-hdfs"></a>[`ENABLE_HDFS`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/hdfs3.cmake#L2) | `ENABLE_LIBRARIES` | Enable HDFS | |
| <a name="enable-icu"></a>[`ENABLE_ICU`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/icu.cmake#L2) | `ENABLE_LIBRARIES` | Enable ICU | |
| <a name="enable-ldap"></a>[`ENABLE_LDAP`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/ldap.cmake#L5) | `ENABLE_LIBRARIES` | Enable LDAP | |
| <a name="enable-libpqxx"></a>[`ENABLE_LIBPQXX`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/libpqxx.cmake#L1) | `ENABLE_LIBRARIES` | Enalbe libpqxx | |
| <a name="enable-msgpack"></a>[`ENABLE_MSGPACK`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/msgpack.cmake#L1) | `ENABLE_LIBRARIES` | Enable msgpack library | |
| <a name="enable-mysql"></a>[`ENABLE_MYSQL`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/mysqlclient.cmake#L2) | `ENABLE_LIBRARIES` | Enable MySQL | |
| <a name="enable-nuraft"></a>[`ENABLE_NURAFT`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/nuraft.cmake#L1) | `ENABLE_LIBRARIES` | Enable NuRaft | |
| <a name="enable-odbc"></a>[`ENABLE_ODBC`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/odbc.cmake#L1) | `ENABLE_LIBRARIES` | Enable ODBC library | |
| <a name="enable-orc"></a>[`ENABLE_ORC`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/orc.cmake#L1) | `ENABLE_LIBRARIES` | Enable ORC | |
| <a name="enable-parquet"></a>[`ENABLE_PARQUET`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/parquet.cmake#L2) | `ENABLE_LIBRARIES` | Enable parquet | |
| <a name="enable-protobuf"></a>[`ENABLE_PROTOBUF`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/protobuf.cmake#L1) | `ENABLE_LIBRARIES` | Enable protobuf | |
| <a name="enable-rapidjson"></a>[`ENABLE_RAPIDJSON`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/rapidjson.cmake#L1) | `ENABLE_LIBRARIES` | Use rapidjson | |
| <a name="enable-rdkafka"></a>[`ENABLE_RDKAFKA`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/rdkafka.cmake#L1) | `ENABLE_LIBRARIES` | Enable kafka | |
| <a name="enable-rocksdb"></a>[`ENABLE_ROCKSDB`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/rocksdb.cmake#L1) | `ENABLE_LIBRARIES` | Enable ROCKSDB | |
| <a name="enable-s"></a>[`ENABLE_S3`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/s3.cmake#L2) | `ENABLE_LIBRARIES` | Enable S3 | |
| <a name="enable-ssl"></a>[`ENABLE_SSL`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/ssl.cmake#L3) | `ENABLE_LIBRARIES` | Enable ssl | Needed when securely connecting to an external server, e.g. clickhouse-client --host ... --secure |
| <a name="enable-stats"></a>[`ENABLE_STATS`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/stats.cmake#L1) | `ENABLE_LIBRARIES` | Enalbe StatsLib library | |
### External libraries system/bundled mode
| Name | Default value | Description | Comment |
|------|---------------|-------------|---------|
| <a name="use-internal-avro-library"></a>[`USE_INTERNAL_AVRO_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/avro.cmake#L11) | `ON` | Set to FALSE to use system avro library instead of bundled | |
| <a name="use-internal-aws-s-library"></a>[`USE_INTERNAL_AWS_S3_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/s3.cmake#L14) | `ON` | Set to FALSE to use system S3 instead of bundled (experimental set to OFF on your own risk) | |
| <a name="use-internal-brotli-library"></a>[`USE_INTERNAL_BROTLI_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/brotli.cmake#L12) | `USE_STATIC_LIBRARIES` | Set to FALSE to use system libbrotli library instead of bundled | Many system ship only dynamic brotly libraries, so we back off to bundled by default |
| <a name="use-internal-capnp-library"></a>[`USE_INTERNAL_CAPNP_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/capnp.cmake#L10) | `NOT_UNBUNDLED` | Set to FALSE to use system capnproto library instead of bundled | |
| <a name="use-internal-curl"></a>[`USE_INTERNAL_CURL`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/curl.cmake#L10) | `NOT_UNBUNDLED` | Use internal curl library | |
| <a name="use-internal-grpc-library"></a>[`USE_INTERNAL_GRPC_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/grpc.cmake#L25) | `NOT_UNBUNDLED` | Set to FALSE to use system gRPC library instead of bundled. (Experimental. Set to OFF on your own risk) | Normally we use the internal gRPC framework. You can set USE_INTERNAL_GRPC_LIBRARY to OFF to force using the external gRPC framework, which should be installed in the system in this case. The external gRPC framework can be installed in the system by running sudo apt-get install libgrpc++-dev protobuf-compiler-grpc |
| <a name="use-internal-gtest-library"></a>[`USE_INTERNAL_GTEST_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/gtest.cmake#L3) | `NOT_UNBUNDLED` | Set to FALSE to use system Google Test instead of bundled | |
| <a name="use-internal-h-library"></a>[`USE_INTERNAL_H3_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/h3.cmake#L9) | `ON` | Set to FALSE to use system h3 library instead of bundled | |
| <a name="use-internal-hdfs-library"></a>[`USE_INTERNAL_HDFS3_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/hdfs3.cmake#L14) | `ON` | Set to FALSE to use system HDFS3 instead of bundled (experimental - set to OFF on your own risk) | |
| <a name="use-internal-icu-library"></a>[`USE_INTERNAL_ICU_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/icu.cmake#L15) | `NOT_UNBUNDLED` | Set to FALSE to use system ICU library instead of bundled | |
| <a name="use-internal-ldap-library"></a>[`USE_INTERNAL_LDAP_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/ldap.cmake#L14) | `NOT_UNBUNDLED` | Set to FALSE to use system *LDAP library instead of bundled | |
| <a name="use-internal-libcxx-library"></a>[`USE_INTERNAL_LIBCXX_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/cxx.cmake#L15) | `USE_INTERNAL_LIBCXX_LIBRARY_DEFAULT` | Disable to use system libcxx and libcxxabi libraries instead of bundled | |
| <a name="use-internal-libgsasl-library"></a>[`USE_INTERNAL_LIBGSASL_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/libgsasl.cmake#L12) | `USE_STATIC_LIBRARIES` | Set to FALSE to use system libgsasl library instead of bundled | when USE_STATIC_LIBRARIES we usually need to pick up hell a lot of dependencies for libgsasl |
| <a name="use-internal-libxml-library"></a>[`USE_INTERNAL_LIBXML2_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/libxml2.cmake#L1) | `NOT_UNBUNDLED` | Set to FALSE to use system libxml2 library instead of bundled | |
| <a name="use-internal-llvm-library"></a>[`USE_INTERNAL_LLVM_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/llvm.cmake#L8) | `NOT_UNBUNDLED` | Use bundled or system LLVM library. | |
| <a name="use-internal-msgpack-library"></a>[`USE_INTERNAL_MSGPACK_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/msgpack.cmake#L10) | `NOT_UNBUNDLED` | Set to FALSE to use system msgpack library instead of bundled | |
| <a name="use-internal-mysql-library"></a>[`USE_INTERNAL_MYSQL_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/mysqlclient.cmake#L15) | `NOT_UNBUNDLED` | Set to FALSE to use system mysqlclient library instead of bundled | |
| <a name="use-internal-odbc-library"></a>[`USE_INTERNAL_ODBC_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/odbc.cmake#L22) | `NOT_UNBUNDLED` | Use internal ODBC library | |
| <a name="use-internal-orc-library"></a>[`USE_INTERNAL_ORC_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/orc.cmake#L11) | `ON` | Set to FALSE to use system ORC instead of bundled (experimental set to OFF on your own risk) | |
| <a name="use-internal-parquet-library"></a>[`USE_INTERNAL_PARQUET_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/parquet.cmake#L16) | `NOT_UNBUNDLED` | Set to FALSE to use system parquet library instead of bundled | |
| <a name="use-internal-poco-library"></a>[`USE_INTERNAL_POCO_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/poco.cmake#L1) | `ON` | Use internal Poco library | |
| <a name="use-internal-protobuf-library"></a>[`USE_INTERNAL_PROTOBUF_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/protobuf.cmake#L14) | `NOT_UNBUNDLED` | Set to FALSE to use system protobuf instead of bundled. (Experimental. Set to OFF on your own risk) | Normally we use the internal protobuf library. You can set USE_INTERNAL_PROTOBUF_LIBRARY to OFF to force using the external protobuf library, which should be installed in the system in this case. The external protobuf library can be installed in the system by running sudo apt-get install libprotobuf-dev protobuf-compiler libprotoc-dev |
| <a name="use-internal-rapidjson-library"></a>[`USE_INTERNAL_RAPIDJSON_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/rapidjson.cmake#L9) | `NOT_UNBUNDLED` | Set to FALSE to use system rapidjson library instead of bundled | |
| <a name="use-internal-rdkafka-library"></a>[`USE_INTERNAL_RDKAFKA_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/rdkafka.cmake#L10) | `NOT_UNBUNDLED` | Set to FALSE to use system librdkafka instead of the bundled | |
| <a name="use-internal-re-library"></a>[`USE_INTERNAL_RE2_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/re2.cmake#L1) | `NOT_UNBUNDLED` | Set to FALSE to use system re2 library instead of bundled [slower] | |
| <a name="use-internal-rocksdb-library"></a>[`USE_INTERNAL_ROCKSDB_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/rocksdb.cmake#L10) | `NOT_UNBUNDLED` | Set to FALSE to use system ROCKSDB library instead of bundled | |
| <a name="use-internal-snappy-library"></a>[`USE_INTERNAL_SNAPPY_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/snappy.cmake#L10) | `NOT_UNBUNDLED` | Set to FALSE to use system snappy library instead of bundled | |
| <a name="use-internal-sparsehash-library"></a>[`USE_INTERNAL_SPARSEHASH_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/sparsehash.cmake#L1) | `ON` | Set to FALSE to use system sparsehash library instead of bundled | |
| <a name="use-internal-ssl-library"></a>[`USE_INTERNAL_SSL_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/ssl.cmake#L12) | `NOT_UNBUNDLED` | Set to FALSE to use system *ssl library instead of bundled | |
| <a name="use-internal-zlib-library"></a>[`USE_INTERNAL_ZLIB_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/zlib.cmake#L1) | `NOT_UNBUNDLED` | Set to FALSE to use system zlib library instead of bundled | |
| <a name="use-internal-zstd-library"></a>[`USE_INTERNAL_ZSTD_LIBRARY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/zstd.cmake#L1) | `NOT_UNBUNDLED` | Set to FALSE to use system zstd library instead of bundled | |
### Other flags
| Name | Default value | Description | Comment |
|------|---------------|-------------|---------|
| <a name="add-gdb-index-for-gold"></a>[`ADD_GDB_INDEX_FOR_GOLD`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L195) | `OFF` | Add .gdb-index to resulting binaries for gold linker. | Ignored if `lld` is used |
| <a name="arch-native"></a>[`ARCH_NATIVE`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L248) | `OFF` | Add -march=native compiler flag | |
| <a name="clickhouse-split-binary"></a>[`CLICKHOUSE_SPLIT_BINARY`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L98) | `OFF` | Make several binaries (clickhouse-server, clickhouse-client etc.) instead of one bundled | |
| <a name="compiler-pipe"></a>[`COMPILER_PIPE`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L235) | `ON` | -pipe compiler option | Less `/tmp` usage, more RAM usage. |
| <a name="enable-check-heavy-builds"></a>[`ENABLE_CHECK_HEAVY_BUILDS`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L69) | `OFF` | Don't allow C++ translation units to compile too long or to take too much memory while compiling | |
| <a name="enable-fuzzing"></a>[`ENABLE_FUZZING`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L115) | `OFF` | Fuzzy testing using libfuzzer | Implies `WITH_COVERAGE` |
| <a name="enable-libraries"></a>[`ENABLE_LIBRARIES`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L357) | `ON` | Enable all external libraries by default | Turns on all external libs like s3, kafka, ODBC, ... |
| <a name="enable-multitarget-code"></a>[`ENABLE_MULTITARGET_CODE`](https://github.com/clickhouse/clickhouse/blob/master/src/Functions/CMakeLists.txt#L100) | `ON` | Enable platform-dependent code | ClickHouse developers may use platform-dependent code under some macro (e.g. `ifdef ENABLE_MULTITARGET`). If turned ON, this option defines such macro. See `src/Functions/TargetSpecific.h` |
| <a name="enable-tests"></a>[`ENABLE_TESTS`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L154) | `ON` | Provide unit_test_dbms target with Google.Test unit tests | If turned `ON`, assumes the user has either the system GTest library or the bundled one. |
| <a name="enable-thinlto"></a>[`ENABLE_THINLTO`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L313) | `ON` | Clang-specific link time optimization | https://clang.llvm.org/docs/ThinLTO.html Applies to clang only. Disabled when building with tests or sanitizers. |
| <a name="fail-on-unsupported-options-combination"></a>[`FAIL_ON_UNSUPPORTED_OPTIONS_COMBINATION`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L32) | `ON` | Stop/Fail CMake configuration if some ENABLE_XXX option is defined (either ON or OFF) but is not possible to satisfy | If turned off: e.g. when ENABLE_FOO is ON, but FOO tool was not found, the CMake will continue. |
| <a name="glibc-compatibility"></a>[`GLIBC_COMPATIBILITY`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L159) | `ON` | Enable compatibility with older glibc libraries. | Only for Linux, x86_64. Implies `ENABLE_FASTMEMCPY` |
| <a name="linker-name"></a>[`LINKER_NAME`](https://github.com/clickhouse/clickhouse/blob/master/cmake/tools.cmake#L44) | `OFF` | Linker name or full path | Example values: `lld-10`, `gold`. |
| <a name="llvm-has-rtti"></a>[`LLVM_HAS_RTTI`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/llvm.cmake#L40) | `ON` | Enable if LLVM was build with RTTI enabled | |
| <a name="make-static-libraries"></a>[`MAKE_STATIC_LIBRARIES`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L91) | `USE_STATIC_LIBRARIES` | Disable to make shared libraries | |
| <a name="parallel-compile-jobs"></a>[`PARALLEL_COMPILE_JOBS`](https://github.com/clickhouse/clickhouse/blob/master/cmake/limit_jobs.cmake#L10) | `""` | Maximum number of concurrent compilation jobs | 1 if not set |
| <a name="parallel-link-jobs"></a>[`PARALLEL_LINK_JOBS`](https://github.com/clickhouse/clickhouse/blob/master/cmake/limit_jobs.cmake#L13) | `""` | Maximum number of concurrent link jobs | 1 if not set |
| <a name="sanitize"></a>[`SANITIZE`](https://github.com/clickhouse/clickhouse/blob/master/cmake/sanitize.cmake#L7) | `""` | Enable one of the code sanitizers | Possible values: - `address` (ASan) - `memory` (MSan) - `thread` (TSan) - `undefined` (UBSan) - "" (no sanitizing) |
| <a name="split-shared-libraries"></a>[`SPLIT_SHARED_LIBRARIES`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L96) | `OFF` | Keep all internal libraries as separate .so files | DEVELOPER ONLY. Faster linking if turned on. |
| <a name="strip-debug-symbols-functions"></a>[`STRIP_DEBUG_SYMBOLS_FUNCTIONS`](https://github.com/clickhouse/clickhouse/blob/master/src/Functions/CMakeLists.txt#L49) | `STRIP_DSF_DEFAULT` | Do not generate debugger info for ClickHouse functions | Provides faster linking and lower binary size. Tradeoff is the inability to debug some source files with e.g. gdb (empty stack frames and no local variables)." |
| <a name="unbundled"></a>[`UNBUNDLED`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L363) | `OFF` | Use system libraries instead of ones in contrib/ | We recommend avoiding this mode for production builds because we can't guarantee all needed libraries exist in your system. This mode exists for enthusiastic developers who are searching for trouble. Useful for maintainers of OS packages. |
| <a name="use-include-what-you-use"></a>[`USE_INCLUDE_WHAT_YOU_USE`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L418) | `OFF` | Automatically reduce unneeded includes in source code (external tool) | https://github.com/include-what-you-use/include-what-you-use |
| <a name="use-libcxx"></a>[`USE_LIBCXX`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/cxx.cmake#L1) | `NOT_UNBUNDLED` | Use libc++ and libc++abi instead of libstdc++ | |
| <a name="use-sentry"></a>[`USE_SENTRY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/sentry.cmake#L13) | `ENABLE_LIBRARIES` | Use Sentry | |
| <a name="use-simdjson"></a>[`USE_SIMDJSON`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/simdjson.cmake#L1) | `ENABLE_LIBRARIES` | Use simdjson | |
| <a name="use-snappy"></a>[`USE_SNAPPY`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/snappy.cmake#L1) | `ENABLE_LIBRARIES` | Enable snappy library | |
| <a name="use-static-libraries"></a>[`USE_STATIC_LIBRARIES`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L90) | `ON` | Disable to use shared libraries | |
| <a name="use-unwind"></a>[`USE_UNWIND`](https://github.com/clickhouse/clickhouse/blob/master/cmake/find/unwind.cmake#L1) | `ENABLE_LIBRARIES` | Enable libunwind (better stacktraces) | |
| <a name="werror"></a>[`WERROR`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L373) | `OFF` | Enable -Werror compiler option | Using system libs can cause a lot of warnings in includes (on macro expansion). |
| <a name="weverything"></a>[`WEVERYTHING`](https://github.com/clickhouse/clickhouse/blob/master/cmake/warnings.cmake#L22) | `ON` | Enable -Weverything option with some exceptions. | Add some warnings that are not available even with -Wall -Wextra -Wpedantic. Intended for exploration of new compiler warnings that may be found useful. Applies to clang only |
| <a name="with-coverage"></a>[`WITH_COVERAGE`](https://github.com/clickhouse/clickhouse/blob/master/CMakeLists.txt#L274) | `OFF` | Profile the resulting binary/binaries | Compiler-specific coverage flags e.g. -fcoverage-mapping for gcc |
## Developer's guide for adding new CMake options
### Don't be obvious. Be informative.
Bad:
```cmake
option (ENABLE_TESTS "Enables testing" OFF)
```
This description is quite useless as is neither gives the viewer any additional information nor explains the option purpose.
Better:
```cmake
option(ENABLE_TESTS "Provide unit_test_dbms target with Google.test unit tests" OFF)
```
If the option's purpose can't be guessed by its name, or the purpose guess may be misleading, or option has some
pre-conditions, leave a comment above the `option()` line and explain what it does.
The best way would be linking the docs page (if it exists).
The comment is parsed into a separate column (see below).
Even better:
```cmake
# implies ${TESTS_ARE_ENABLED}
# see tests/CMakeLists.txt for implementation detail.
option(ENABLE_TESTS "Provide unit_test_dbms target with Google.test unit tests" OFF)
```
### If the option's state could produce unwanted (or unusual) result, explicitly warn the user.
Suppose you have an option that may strip debug symbols from the ClickHouse's part.
This can speed up the linking process, but produces a binary that cannot be debugged.
In that case, prefer explicitly raising a warning telling the developer that he may be doing something wrong.
Also, such options should be disabled if applies.
Bad:
```cmake
option(STRIP_DEBUG_SYMBOLS_FUNCTIONS
"Do not generate debugger info for ClickHouse functions.
${STRIP_DSF_DEFAULT})
if (STRIP_DEBUG_SYMBOLS_FUNCTIONS)
target_compile_options(clickhouse_functions PRIVATE "-g0")
endif()
```
Better:
```cmake
# Provides faster linking and lower binary size.
# Tradeoff is the inability to debug some source files with e.g. gdb
# (empty stack frames and no local variables)."
option(STRIP_DEBUG_SYMBOLS_FUNCTIONS
"Do not generate debugger info for ClickHouse functions."
${STRIP_DSF_DEFAULT})
if (STRIP_DEBUG_SYMBOLS_FUNCTIONS)
message(WARNING "Not generating debugger info for ClickHouse functions")
target_compile_options(clickhouse_functions PRIVATE "-g0")
endif()
```
### In the option's description, explain WHAT the option does rather than WHY it does something.
The WHY explanation should be placed in the comment.
You may find that the option's name is self-descriptive.
Bad:
```cmake
option(ENABLE_THINLTO "Enable Thin LTO. Only applicable for clang. It's also suppressed when building with tests or sanitizers." ON)
```
Better:
```cmake
# Only applicable for clang.
# Turned off when building with tests or sanitizers.
option(ENABLE_THINLTO "Clang-specific link time optimisation" ON).
```
### Don't assume other developers know as much as you do.
In ClickHouse, there are many tools used that an ordinary developer may not know. If you are in doubt, give a link to
the tool's docs. It won't take much of your time.
Bad:
```cmake
option(ENABLE_THINLTO "Enable Thin LTO. Only applicable for clang. It's also suppressed when building with tests or sanitizers." ON)
```
Better (combined with the above hint):
```cmake
# https://clang.llvm.org/docs/ThinLTO.html
# Only applicable for clang.
# Turned off when building with tests or sanitizers.
option(ENABLE_THINLTO "Clang-specific link time optimisation" ON).
```
Other example, bad:
```cmake
option (USE_INCLUDE_WHAT_YOU_USE "Use 'include-what-you-use' tool" OFF)
```
Better:
```cmake
# https://github.com/include-what-you-use/include-what-you-use
option (USE_INCLUDE_WHAT_YOU_USE "Reduce unneeded #include s (external tool)" OFF)
```
### Prefer consistent default values.
CMake allows you to pass a plethora of values representing boolean `true/false`, e.g. `1, ON, YES, ...`.
Prefer the `ON/OFF` values, if possible.

1
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@ -11,5 +11,6 @@ ClickHouse supports authenticating and managing users using external services.
The following external authenticators and directories are supported:
- [LDAP](./ldap.md#external-authenticators-ldap) [Authenticator](./ldap.md#ldap-external-authenticator) and [Directory](./ldap.md#ldap-external-user-directory)
- Kerberos [Authenticator](./kerberos.md#external-authenticators-kerberos)
[Original article](https://clickhouse.tech/docs/en/operations/external-authenticators/index/) <!--hide-->

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@ -0,0 +1,115 @@
# Kerberos {#external-authenticators-kerberos}
Existing and properly configured ClickHouse users can be authenticated via Kerberos authentication protocol.
Currently, Kerberos can only be used as an external authenticator for existing users, which are defined in `users.xml` or in local access control paths. Those users may only use HTTP requests and must be able to authenticate using GSS-SPNEGO mechanism.
For this approach, Kerberos must be configured in the system and must be enabled in ClickHouse config.
## Enabling Kerberos in ClickHouse {#enabling-kerberos-in-clickhouse}
To enable Kerberos, one should include `kerberos` section in `config.xml`. This section may contain additional parameters.
#### Parameters:
- `principal` - canonical service principal name that will be acquired and used when accepting security contexts.
- This parameter is optional, if omitted, the default principal will be used.
- `realm` - a realm, that will be used to restrict authentication to only those requests whose initiator's realm matches it.
- This parameter is optional, if omitted, no additional filtering by realm will be applied.
Example (goes into `config.xml`):
```xml
<yandex>
<!- ... -->
<kerberos />
</yandex>
```
With principal specification:
```xml
<yandex>
<!- ... -->
<kerberos>
<principal>HTTP/clickhouse.example.com@EXAMPLE.COM</principal>
</kerberos>
</yandex>
```
With filtering by realm:
```xml
<yandex>
<!- ... -->
<kerberos>
<realm>EXAMPLE.COM</realm>
</kerberos>
</yandex>
```
!!! warning "Note"
You can define only one `kerberos` section. The presence of multiple `kerberos` sections will force ClickHouse to disable Kerberos authentication.
!!! warning "Note"
`principal` and `realm` sections cannot be specified at the same time. The presence of both `principal` and `realm` sections will force ClickHouse to disable Kerberos authentication.
## Kerberos as an external authenticator for existing users {#kerberos-as-an-external-authenticator-for-existing-users}
Kerberos can be used as a method for verifying the identity of locally defined users (users defined in `users.xml` or in local access control paths). Currently, **only** requests over the HTTP interface can be *kerberized* (via GSS-SPNEGO mechanism).
Kerberos principal name format usually follows this pattern:
- *primary/instance@REALM*
The */instance* part may occur zero or more times. **The *primary* part of the canonical principal name of the initiator is expected to match the kerberized user name for authentication to succeed**.
### Enabling Kerberos in `users.xml` {#enabling-kerberos-in-users-xml}
In order to enable Kerberos authentication for the user, specify `kerberos` section instead of `password` or similar sections in the user definition.
Parameters:
- `realm` - a realm that will be used to restrict authentication to only those requests whose initiator's realm matches it.
- This parameter is optional, if omitted, no additional filtering by realm will be applied.
Example (goes into `users.xml`):
```xml
<yandex>
<!- ... -->
<users>
<!- ... -->
<my_user>
<!- ... -->
<kerberos>
<realm>EXAMPLE.COM</realm>
</kerberos>
</my_user>
</users>
</yandex>
```
!!! warning "Warning"
Note that Kerberos authentication cannot be used alongside with any other authentication mechanism. The presence of any other sections like `password` alongside `kerberos` will force ClickHouse to shutdown.
!!! info "Reminder"
Note, that now, once user `my_user` uses `kerberos`, Kerberos must be enabled in the main `config.xml` file as described previously.
### Enabling Kerberos using SQL {#enabling-kerberos-using-sql}
When [SQL-driven Access Control and Account Management](../access-rights.md#access-control) is enabled in ClickHouse, users identified by Kerberos can also be created using SQL statements.
```sql
CREATE USER my_user IDENTIFIED WITH kerberos REALM 'EXAMPLE.COM'
```
...or, without filtering by realm:
```sql
CREATE USER my_user IDENTIFIED WITH kerberos
```

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@ -11,5 +11,6 @@ ClickHouse поддерживает аутентификацию и управл
Поддерживаются следующие внешние аутентификаторы и каталоги:
- [LDAP](./ldap.md#external-authenticators-ldap) [аутентификатор](./ldap.md#ldap-external-authenticator) и [каталог](./ldap.md#ldap-external-user-directory)
- Kerberos [аутентификатор](./kerberos.md#external-authenticators-kerberos)
[Оригинальная статья](https://clickhouse.tech/docs/ru/operations/external-authenticators/index/) <!--hide-->

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@ -0,0 +1,118 @@
# Kerberos {#external-authenticators-kerberos}
ClickHouse предоставляет возможность аутентификации существующих (и правильно сконфигурированных) пользователей с использованием Kerberos.
В настоящее время возможно использование Kerberos только как внешнего аутентификатора, то есть для аутентификации уже существующих пользователей с помощью Kerberos. Пользователи, настроенные для Kerberos-аутентификации, могут работать с ClickHouse только через HTTP-интерфейс, причём сами клиенты должны иметь возможность аутентификации с использованием механизма GSS-SPNEGO.
!!! info "!!!"
Для Kerberos-аутентификации необходимо предварительно корректно настроить Kerberos на стороне клиента, на сервере и в конфигурационных файлах самого ClickHouse. Ниже описана лишь конфигурация ClickHouse.
## Настройка Kerberos в ClickHouse {#enabling-kerberos-in-clickhouse}
Для того, чтобы задействовать Kerberos-аутентификацию в ClickHouse, в первую очередь необходимо добавить одну-единственную секцию `kerberos` в `config.xml`.
В секции могут быть указаны дополнительные параметры:
- `principal` &mdash; задаёт имя принципала (canonical service principal name, SPN), используемое при авторизации ClickHouse на Kerberos-сервере.
- Это опциональный параметр, при его отсутствии будет использовано стандартное имя.
- `realm` &mdash; обеспечивает фильтрацию по реалм (realm). Пользователям, чей реалм не совпадает с указанным, будет отказано в аутентификации.
- Это опциональный параметр, при его отсутствии фильтр по реалм применяться не будет.
Примеры, как должен выглядеть файл `config.xml`:
```xml
<yandex>
<!- ... -->
<kerberos />
</yandex>
```
Или, с указанием принципала:
```xml
<yandex>
<!- ... -->
<kerberos>
<principal>HTTP/clickhouse.example.com@EXAMPLE.COM</principal>
</kerberos>
</yandex>
```
Или, с фильтрацией по реалм:
```xml
<yandex>
<!- ... -->
<kerberos>
<realm>EXAMPLE.COM</realm>
</kerberos>
</yandex>
```
!!! Warning "Важно"
В конфигурационном файле не могут быть указаны одновременно оба параметра. В противном случае, аутентификация с помощью Kerberos будет недоступна для всех пользователей.
!!! Warning "Важно"
В конфигурационном файле может быть не более одной секции `kerberos`. В противном случае, аутентификация с помощью Kerberos будет отключена для всех пользователей.
## Аутентификация пользователей с помощью Kerberos {#kerberos-as-an-external-authenticator-for-existing-users}
Уже существующие пользователи могут воспользоваться аутентификацией с помощью Kerberos. Однако, Kerberos-аутентификация возможна только при использовании HTTP-интерфейса.
Имя принципала (principal name) обычно имеет вид:
- *primary/instance@REALM*
Для успешной аутентификации необходимо, чтобы *primary* совпало с именем пользователя ClickHouse, настроенного для использования Kerberos.
### Настройка Kerberos в `users.xml` {#enabling-kerberos-in-users-xml}
Для того, чтобы пользователь имел возможность производить аутентификацию с помощью Kerberos, достаточно включить секцию `kerberos` в описание пользователя в `users.xml` (например, вместо секции `password` или аналогичной ей).
В секции могут быть указаны дополнительные параметры:
- `realm` &mdash; обеспечивает фильтрацию по реалм (realm): аутентификация будет возможна только при совпадении реалм клиента с указанным.
- Этот параметр является опциональным, при его отсутствии фильтрация применяться не будет.
Пример, как выглядит конфигурация Kerberos в `users.xml`:
```xml
<yandex>
<!- ... -->
<users>
<!- ... -->
<my_user>
<!- ... -->
<kerberos>
<realm>EXAMPLE.COM</realm>
</kerberos>
</my_user>
</users>
</yandex>
```
!!! Warning "Важно"
Если пользователь настроен для Kerberos-аутентификации, другие виды уатентификации будут для него недоступны. Если наряду с `kerberos` в определении пользователя будет указан какой-либо другой способ аутентификации, ClickHouse завершит работу.
!!! info ""
Ещё раз отметим, что кроме `users.xml`, необходимо также включить Kerberos в `config.xml`.
### Настройка Kerberos через SQL {#enabling-kerberos-using-sql}
Пользователей, использующих Kerberos-аутентификацию, можно создать не только с помощью изменения конфигурационных файлов.
Если SQL-ориентированное управление доступом включено в ClickHouse, можно также создать пользователя, работающего через Kerberos, с помощью SQL.
```sql
CREATE USER my_user IDENTIFIED WITH kerberos REALM 'EXAMPLE.COM'
```
Или, без фильтрации по реалм:
```sql
CREATE USER my_user IDENTIFIED WITH kerberos
```