[demos] Add MySQL demo

demos/mysql/.gitignore

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+occlum_instance
+mysql_src
+boost*
+*tar*

demos/mysql/README.md

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+# Run MySQL on Occlum
+
+[`MySQL`](https://www.mysql.com/) is a widely used open-source relational database management system (RDBMS).
+
+### Build and install
+```
+./dl_and_build_mysql.sh
+```
+This command downloads MySQL-8.0.31 source code and builds from it.
+When completed, all MySQL related binaries and tools are installed.
+
+### Run server and client
+
+#### Initialize and start the MySQL server
+```
+./run_mysql_server.sh
+```
+This command initializes and runs the server (using `mysqld`) in Occlum.
+When completed, the server starts to wait connections.
+
+#### Start the MySQL client and send simple queries
+```
+./run_mysql_client.sh
+```
+This command starts the client (using `mysql`) in Occlum and test basic query SQLs.
+
+The network protocol between client and server uses uds(unix domain socket) by default.
+More configuration can be tuned and applied in `my.cnf`.

demos/mysql/apply-mysql-to-occlum.patch

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+--- mysql_src/mysys/my_rdtsc-origin.cc	2022-12-08 09:14:01.171126659 +0000
++++ mysql_src/mysys/my_rdtsc.cc	2022-12-08 09:08:52.016352814 +0000
+@@ -299,16 +299,16 @@
+ */
+ 
+ ulonglong my_timer_ticks(void) {
+-#if defined(HAVE_SYS_TIMES_H) && defined(HAVE_TIMES)
+-  {
+-    struct tms times_buf;
+-    return (ulonglong)times(&times_buf);
+-  }
+-#elif defined(_WIN32)
+-  return (ulonglong)GetTickCount();
+-#else
++// #if defined(HAVE_SYS_TIMES_H) && defined(HAVE_TIMES)
++//   {
++//     struct tms times_buf;
++//     return (ulonglong)times(&times_buf);
++//   }
++// #elif defined(_WIN32)
++//   return (ulonglong)GetTickCount();
++// #else
+   return 0;
+-#endif
++// #endif
+ }
+ 
+ /**

demos/mysql/dl_and_build_mysql.sh

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+#!/bin/bash
+set -e
+
+BLUE='\033[1;34m'
+NC='\033[0m'
+echo -e "${BLUE}Start installing dependencies.${NC}"
+
+# Prepare environment
+DEPS="libnuma-dev libboost-all-dev"
+
+apt-get update
+apt-get install -y ${DEPS}
+
+BOOST="boost_1_77_0"
+wget https://boostorg.jfrog.io/artifactory/main/release/1.77.0/source/${BOOST}.tar.bz2
+tar --bzip2 -xf ${BOOST}.tar.bz2
+pushd ${BOOST}
+./bootstrap.sh --prefix=/usr --with-python=python3 &&
+./b2 stage -j4 threading=multi link=shared
+./b2 install threading=multi link=shared
+popd
+
+echo -e "${BLUE}Finish installing dependencies.${NC}"
+
+echo -e "${BLUE}Start building mysql from src.${NC}"
+
+# Download released tarball
+VERSION="8.0.31"
+TARBALL="mysql-${VERSION}.tar.gz"
+wget https://github.com/mysql/mysql-server/archive/refs/tags/${TARBALL}
+rm -rf mysql_src && mkdir mysql_src
+tar -xf ${TARBALL} -C mysql_src --strip-components 1
+
+# Make modification to
+# 1. Disable `times` syscall
+patch -s -p0 < apply-mysql-to-occlum.patch
+
+# Build and install
+pushd mysql_src
+mkdir bld && cd bld
+
+cmake -j$(nproc) .. -DCMAKE_CXX_FLAGS="-fpic -pie" -DCMAKE_C_FLAGS="-fpic -pie"
+
+CC="-fpic -pie" CXX="-fpic -pie" make -j$(nproc)
+
+make install -j$(nproc)
+cd ..
+
+echo -e "${BLUE}Finish building mysql from src.${NC}"
+popd

demos/mysql/my.cnf

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+# MySQL configure file
+
+[client]
+socket              =   /tmp/mysql.sock
+port                =   3306
+bind-address        =   127.0.0.1
+
+[mysqld]
+socket              =   /tmp/mysql.sock
+port                =   3306
+bind-address        =   127.0.0.1
+skip-networking     =   0
+skip_ssl            =   0
+mysqlx              =   0
+wait_timeout        =   60
+interactive_timeout =   120
+
+[mysql]
+connect_timeout     =   2

demos/mysql/mysql.yaml

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+includes:
+  - base.yaml
+# mysql
+targets:
+  # copy bins
+  - target: /bin
+    copy:
+      - files:
+        # server tools
+        - /usr/local/mysql/bin/mysqld
+        # client tools
+        - /usr/local/mysql/bin/mysql
+        - /usr/local/mysql/bin/mysqladmin
+        - /usr/local/mysql/bin/mysqlshow
+  - target: /etc
+    copy:
+      - files:
+        - ../my.cnf
+  - target: /etc
+    copy:
+      - files:
+        - /etc/localtime
+  - target: /opt/occlum/glibc/etc
+    copy:
+      - files:
+        - /etc/localtime
+  - target: /opt/occlum/glibc/lib
+    copy:
+      - files:
+        - /usr/local/mysql/lib/mysqlrouter/private/libprotobuf-lite.so.3.19.4
+  - target: /
+    copy:
+      - files:
+        - /usr/local/mysql/bin/mysqld

demos/mysql/run_mysql_client.sh

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+#!/bin/bash
+set -e
+
+GREEN='\033[1;32m'
+NC='\033[0m'
+
+MYSQL=mysql
+MYSQLSHOW=mysqlshow
+MYSQLADMIN=mysqladmin
+
+# Need to wait until server is ready
+echo -e "${GREEN}Need to wait mysql server to start${NC}"
+
+pushd occlum_instance
+
+echo -e "${GREEN}Run mysql client on Occlum${NC}"
+
+# Use unix domain socket
+occlum exec /bin/${MYSQLADMIN} version
+
+occlum exec /bin/${MYSQLSHOW}
+
+occlum exec /bin/${MYSQL} -e "SELECT User, Host, plugin FROM mysql.user"
+
+echo -e "${GREEN}Run mysql client on host${NC}"
+
+# Use TCP/IP
+/usr/local/mysql/bin/${MYSQLSHOW} -h 127.0.0.1 -P 3306
+
+occlum stop
+
+popd

demos/mysql/run_mysql_server.sh

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+#!/bin/bash
+set -e
+
+GREEN='\033[1;32m'
+NC='\033[0m'
+
+SCRIPT_DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+bomfile=${SCRIPT_DIR}/mysql.yaml
+
+MYSQL=mysql
+MYSQLD=mysqld
+
+# 1. Init Occlum instance
+rm -rf occlum_instance && occlum new occlum_instance
+pushd occlum_instance
+
+new_json="$(jq '.resource_limits.user_space_size = "3500MB" |
+                .resource_limits.kernel_space_heap_size ="3000MB" |
+                .resource_limits.max_num_of_threads = 96' Occlum.json)" && \
+echo "${new_json}" > Occlum.json
+
+
+# 2. Copy files into Occlum instance and build
+rm -rf image
+copy_bom -f $bomfile --root image --include-dir /opt/occlum/etc/template
+
+occlum build
+
+# 3. Run the program
+echo -e "${GREEN}Run mysql server (mysqld) on Occlum${NC}"
+
+occlum start
+
+echo -e "${GREEN}mysql server initialize${NC}"
+
+occlum exec /bin/${MYSQLD} --initialize-insecure --user=root
+
+echo -e "${GREEN}mysql server start${NC}"
+
+occlum exec /bin/${MYSQLD} --user=root
+
+popd