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基础镜像重构之Java21Runtime镜像 ​

构建时间，不包括下载环境包的时间

构建工具选型(来自章节d008) ​

里程碑 ​

  • 20250902
    • 镜像名：kenaito-runtime:jdk21
    • 镜像大小：1.11GB
    • 构建耗时：111.2s
  • 20250903（多阶段构建）
    • 镜像名：kenaito-runtime:jdk21
    • 镜像大小：742.06MB
    • 构建耗时：70.0s
  • 20250904（多阶段构建，仅保留jre）
    • 镜像名：kenaito-runtime:jre21
    • 镜像大小：409MB
    • 构建耗时：67.8s

20250902 ​

shell
# 下载环境
if [ ! -f "Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz" ];then
  curl -O https://dragonwell.oss-cn-shanghai.aliyuncs.com/21.0.7.0.7%2B6/Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz
fi
if [ $? -ne 0 ]; then
  echo "下载 Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz 文件失败"
  exit 1
fi

# 释放文件，优化大小
rm -rf build
mkdir build
tar -xvf Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz
if [ $? -ne 0 ]; then
  echo "初始化失败"
  exit 1
fi
rm -f dragonwell-21.0.7.0.7+6-GA/lib/src.zip
mv dragonwell-21.0.7.0.7+6-GA build/jdk
cd build && pwd

# 压缩成品
tar -czvf jdk.tgz jdk
rm -rf jdk

# 应用控制脚本
cat > appctl.sh << 'EOF'
#!/bin/bash
JAR_NAME="$APP_NAME.jar"
stopApplication(){
    # 查找应用进程
    PID=$(ps -ef | grep "$JAR_NAME" | grep -v grep | grep -v 'restart.sh' | awk '{print $2}')

    # 如果找到进程
    if [ -n "$PID" ]; then
        echo "找到进程 $JAR_NAME, PID: $PID"

        # 发送 SIGTERM 信号 (kill -15)
        echo "正在发送 SIGTERM 信号..."
        kill -15 $PID

        # 等待并检查进程是否终止
        COUNT=0
        # 最大重试次数
        MAX_RETRIES=10
        SLEEP_TIME=1

        while [ $COUNT -lt $MAX_RETRIES ]; do
            if ps -p $PID > /dev/null 2>&1; then
                echo "进程仍在运行，等待中... ($((COUNT+1))/$MAX_RETRIES)"
                sleep $SLEEP_TIME
                COUNT=$((COUNT+1))
            else
                echo "进程已正常终止"
                exit 0
            fi
        done

        # 如果进程仍然存在，使用 kill -9
        if ps -p $PID > /dev/null 2>&1; then
            echo "进程仍未终止，发送 SIGKILL 信号..."
            kill -9 $PID
            sleep 1

            # 确认进程是否被杀死
            if ps -p $PID > /dev/null 2>&1; then
                echo "错误: 无法终止进程 $PID"
                exit 1
            else
                echo "进程已被强制终止"
            fi
        fi
    else
        echo "未找到 $JAR_NAME 进程"
    fi
}
EOF

# 应用重启脚本
cat > restart.sh << 'EOF'
#!/bin/bash
source /home/admin/appctl.sh
if ls /home/admin/app/*.jar >/dev/null 2>&1; then
    stopApplication
    nohup java -jar $JAR_NAME > /home/admin/app/logs/console.log 2>&1 &
    echo "开始启动新的进程..."
fi
sleep 365d
EOF

# Dockerfile
cat > Dockerfile << 'EOF'
FROM alibaba-cloud-linux-3-registry.cn-hangzhou.cr.aliyuncs.com/alinux3/alinux3:latest
LABEL MAINTAINER="tianjun@odboy.cn"
ENV TimeZone="Asia/Shanghai"
ENV JAVA_HOME="/home/admin/jdk"
ENV PATH="$PATH:${JAVA_HOME}/bin"
WORKDIR /home/admin
ADD jdk.tgz .
ADD appctl.sh .
ADD restart.sh .
RUN ln -snf /usr/share/zoneinfo/$TimeZone /etc/localtime && echo $TimeZone > /etc/timezone; \
sed -i 's/mirrors.cloud.aliyuncs.com/mirrors.aliyun.com/' /etc/yum.repos.d/*.repo; \
yum install procps -y; \
chmod +x /home/admin/jdk/bin/*; \
chmod +x /home/admin/*.sh;
EXPOSE 8000
ENTRYPOINT ["/home/admin/restart.sh"]
EOF

# 构建镜像(docker可换成buildah)
docker build --no-cache -f Dockerfile -t kenaito-runtime:jdk21 .
if [ $? -ne 0 ]; then
  echo "构建镜像失败"
  exit 1
fi

# 运行测试
docker run kenaito-runtime:jdk21

20250903 ​

shell
# 下载环境
if [ ! -f "Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz" ];then
  curl -O https://dragonwell.oss-cn-shanghai.aliyuncs.com/21.0.7.0.7%2B6/Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz
fi
if [ $? -ne 0 ]; then
  echo "下载 Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz 文件失败"
  exit 1
fi

# 释放文件，优化大小
rm -rf build
mkdir build
tar -xvf Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz
if [ $? -ne 0 ]; then
  echo "初始化失败"
  exit 1
fi
rm -f dragonwell-21.0.7.0.7+6-GA/lib/src.zip
mv dragonwell-21.0.7.0.7+6-GA build/jdk
cd build && pwd

# 压缩成品
tar -czvf jdk.tgz jdk
rm -rf jdk

# 应用控制脚本
cat > appctl.sh << 'EOF'
#!/bin/bash
JAR_NAME="$APP_NAME.jar"
stopApplication(){
    # 查找应用进程
    PID=$(ps -ef | grep "$JAR_NAME" | grep -v grep | grep -v 'restart.sh' | awk '{print $2}')

    # 如果找到进程
    if [ -n "$PID" ]; then
        echo "找到进程 $JAR_NAME, PID: $PID"

        # 发送 SIGTERM 信号 (kill -15)
        echo "正在发送 SIGTERM 信号..."
        kill -15 $PID

        # 等待并检查进程是否终止
        COUNT=0
        # 最大重试次数
        MAX_RETRIES=10
        SLEEP_TIME=1

        while [ $COUNT -lt $MAX_RETRIES ]; do
            if ps -p $PID > /dev/null 2>&1; then
                echo "进程仍在运行，等待中... ($((COUNT+1))/$MAX_RETRIES)"
                sleep $SLEEP_TIME
                COUNT=$((COUNT+1))
            else
                echo "进程已正常终止"
                exit 0
            fi
        done

        # 如果进程仍然存在，使用 kill -9
        if ps -p $PID > /dev/null 2>&1; then
            echo "进程仍未终止，发送 SIGKILL 信号..."
            kill -9 $PID
            sleep 1

            # 确认进程是否被杀死
            if ps -p $PID > /dev/null 2>&1; then
                echo "错误: 无法终止进程 $PID"
                exit 1
            else
                echo "进程已被强制终止"
            fi
        fi
    else
        echo "未找到 $JAR_NAME 进程"
    fi
}
EOF

# 应用重启脚本
cat > restart.sh << 'EOF'
#!/bin/bash
source /home/admin/appctl.sh
if ls /home/admin/app/*.jar >/dev/null 2>&1; then
    stopApplication
    nohup java -jar $JAR_NAME > /home/admin/app/logs/console.log 2>&1 &
    echo "开始启动新的进程..."
fi
sleep 365d
EOF

# Dockerfile
cat > Dockerfile << 'EOF'
FROM alibaba-cloud-linux-3-registry.cn-hangzhou.cr.aliyuncs.com/alinux3/alinux3:latest AS installer
LABEL MAINTAINER="tianjun@odboy.cn"
ENV TimeZone="Asia/Shanghai"
RUN ln -snf /usr/share/zoneinfo/$TimeZone /etc/localtime && echo $TimeZone > /etc/timezone; \
sed -i 's/mirrors.cloud.aliyuncs.com/mirrors.aliyun.com/' /etc/yum.repos.d/*.repo; \
yum install procps -y;

FROM alibaba-cloud-linux-3-registry.cn-hangzhou.cr.aliyuncs.com/alinux3/alinux3:latest
LABEL MAINTAINER="tianjun@odboy.cn"
ENV TimeZone="Asia/Shanghai"
ENV JAVA_HOME="/home/admin/jdk"
ENV PATH="$PATH:${JAVA_HOME}/bin"
WORKDIR /home/admin
ADD jdk.tgz .
ADD appctl.sh .
ADD restart.sh .
RUN ln -snf /usr/share/zoneinfo/$TimeZone /etc/localtime && echo $TimeZone > /etc/timezone; \
sed -i 's/mirrors.cloud.aliyuncs.com/mirrors.aliyun.com/' /etc/yum.repos.d/*.repo; \
chmod +x /home/admin/jdk/bin/*; \
chmod +x /home/admin/*.sh;
COPY --from=installer /usr/bin/ps /usr/bin/ps
COPY --from=installer /usr/lib64/libprocps.so.7* /usr/lib64/
EXPOSE 8000
ENTRYPOINT ["/home/admin/restart.sh"]
EOF

# 构建镜像(docker可换成buildah)
docker build --no-cache -f Dockerfile -t kenaito-runtime:jdk21 .
if [ $? -ne 0 ]; then
  echo "构建镜像失败"
  exit 1
fi

# 运行测试
docker run kenaito-runtime:jdk21

20250904 ​

shell
# 下载环境
if [ ! -f "Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz" ];then
  curl -O https://dragonwell.oss-cn-shanghai.aliyuncs.com/21.0.7.0.7%2B6/Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz
fi
if [ $? -ne 0 ]; then
  echo "下载 Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz 文件失败"
  exit 1
fi

# 释放文件，优化大小
rm -rf build
mkdir build
tar -xvf Alibaba_Dragonwell_Standard_21.0.7.0.7.6_x64_linux.tar.gz
if [ $? -ne 0 ]; then
  echo "初始化失败"
  exit 1
fi
rm -f dragonwell-21.0.7.0.7+6-GA/lib/src.zip
mv dragonwell-21.0.7.0.7+6-GA build/jdk
cd build && pwd

# 压缩成品
tar -czvf jdk.tgz jdk
rm -rf jdk

# 应用控制脚本
cat > appctl.sh << 'EOF'
#!/bin/bash
JAR_NAME="$APP_NAME.jar"
stopApplication(){
    # 查找应用进程
    PID=$(ps -ef | grep "$JAR_NAME" | grep -v grep | grep -v 'restart.sh' | awk '{print $2}')

    # 如果找到进程
    if [ -n "$PID" ]; then
        echo "找到进程 $JAR_NAME, PID: $PID"

        # 发送 SIGTERM 信号 (kill -15)
        echo "正在发送 SIGTERM 信号..."
        kill -15 $PID

        # 等待并检查进程是否终止
        COUNT=0
        # 最大重试次数
        MAX_RETRIES=10
        SLEEP_TIME=1

        while [ $COUNT -lt $MAX_RETRIES ]; do
            if ps -p $PID > /dev/null 2>&1; then
                echo "进程仍在运行，等待中... ($((COUNT+1))/$MAX_RETRIES)"
                sleep $SLEEP_TIME
                COUNT=$((COUNT+1))
            else
                echo "进程已正常终止"
                exit 0
            fi
        done

        # 如果进程仍然存在，使用 kill -9
        if ps -p $PID > /dev/null 2>&1; then
            echo "进程仍未终止，发送 SIGKILL 信号..."
            kill -9 $PID
            sleep 1

            # 确认进程是否被杀死
            if ps -p $PID > /dev/null 2>&1; then
                echo "错误: 无法终止进程 $PID"
                exit 1
            else
                echo "进程已被强制终止"
            fi
        fi
    else
        echo "未找到 $JAR_NAME 进程"
    fi
}
EOF

# 应用重启脚本
cat > restart.sh << 'EOF'
#!/bin/bash
source /home/admin/appctl.sh
if ls /home/admin/app/*.jar >/dev/null 2>&1; then
    stopApplication
    nohup java -jar $JAR_NAME > /home/admin/app/logs/console.log 2>&1 &
    echo "开始启动新的进程..."
fi
sleep 365d
EOF

# Dockerfile
cat > Dockerfile << 'EOF'
FROM alibaba-cloud-linux-3-registry.cn-hangzhou.cr.aliyuncs.com/alinux3/alinux3:latest AS installer
LABEL MAINTAINER="tianjun@odboy.cn"
ENV TimeZone="Asia/Shanghai"
RUN ln -snf /usr/share/zoneinfo/$TimeZone /etc/localtime && echo $TimeZone > /etc/timezone; \
sed -i 's/mirrors.cloud.aliyuncs.com/mirrors.aliyun.com/' /etc/yum.repos.d/*.repo; \
yum install procps -y;
WORKDIR /home/admin
ADD jdk.tgz .
RUN cd jdk && \
rm -f jmods/._*.jmod && \
./bin/jlink --module-path jmods --add-modules java.desktop --output jre

FROM alibaba-cloud-linux-3-registry.cn-hangzhou.cr.aliyuncs.com/alinux3/alinux3:latest
LABEL MAINTAINER="tianjun@odboy.cn"
ENV TimeZone="Asia/Shanghai"
ENV JAVA_HOME="/home/admin/jre"
ENV PATH="$PATH:${JAVA_HOME}/bin"
WORKDIR /home/admin
ADD appctl.sh .
ADD restart.sh .
RUN ln -snf /usr/share/zoneinfo/$TimeZone /etc/localtime && echo $TimeZone > /etc/timezone; \
sed -i 's/mirrors.cloud.aliyuncs.com/mirrors.aliyun.com/' /etc/yum.repos.d/*.repo; \
chmod +x /home/admin/jre/bin/*; \
chmod +x /home/admin/*.sh;
COPY --from=installer /usr/bin/ps /usr/bin/ps
COPY --from=installer /usr/lib64/libprocps.so.7* /usr/lib64/
COPY --from=installer /home/admin/jdk/jre/ /home/admin/jre/
EXPOSE 8000
ENTRYPOINT ["/home/admin/restart.sh"]
EOF

# 构建镜像(docker可换成buildah)
docker build --no-cache -f Dockerfile -t kenaito-runtime:jre21 .
if [ $? -ne 0 ]; then
  echo "构建镜像失败"
  exit 1
fi

# 运行测试
docker run kenaito-runtime:jre21