• Ubuntu下zookeeper C client安装


    1 安装zookeeper
        (a)下载    zookeeper-x.y.z.tar.gz  
        (b)安装jdk:
        下载jdk:jdk-7u25-linux-i586.tar.gz
        tar zxvf jdk-7u25-linux-i586.tar.gz
        安装zookeeper:
        tar zxvf zookeeper-3.3.5.tar.gz
               cd /zookeeper-3.3.5
        (c)环境变量设置:
        vim /etc/profile
        在最后添加下面两条语句
        export JAVA_HOME=/usr/local/src/jdk1.7.0_25
        export JRE_HOME=/usr/local/src/jdk1.7.0_25/jre
        export ZOOKEEPER_INSTALL=/usr/local/src/zookeeper-3.3.5
               export PATH=$PATH:$ZOOKEEPER_INSTALL/bin:$JAVA_HOME/bin:$JRE_HOME/bin
        (d)配置文件设置:
        运行zookeeper之前,需要创建配置文件,在./conf/zoo.cfg,单机运行的只需要指定dataDir即可,在集群中还要指定服务器的配置
        单机配置:
             cd conf
             cp zoo_sample.cfg zoo.cfg
             vim zoo.cfg
        之后修改zoo.cfg中的dataDir为存储快照的目录即可
    2 安装 C client:
      Zookeeper C client 的实现在 src/c 目录下,进入到该目录安装 Zookeeper C client,步骤如下:
    $ cd ./src/c
    $ ./configure $ make $ sudo make install
    3 启动:
       zkServer.sh start
      正常启动后,发送四字命令可以测试是否正常运行,比如发送
        echo ruok|nc 127.0.0.1 2181
      会收到 imok 的提示,表示zookeeper启动成功!
     

     当启动 ZooKeeper 服务成功之后,输入下述命令,连接到 ZooKeeper 服务:

    zkCli.sh –server 10.77.20.23:2181

     
    4 C 开发示例:
    编译的时候引入所在的头文件和动态库 gcc -o zookeeper_test zookeeper_test.c -I/usr/local/include/c-client-src -L/usr/local/lib -lzookeeper_mt
    具体示例:
    /*
     * =============================================================================
     *
     *       Filename:  zktest.c
     *
     *       Description:  zookeeper api testcase.
     *
     *       Created:  02/15/2013 08:48:49 PM
     *
     *       Author:  Fu Haiping (forhappy), haipingf@gmail.com
     *       Company:  ICT ( Institute Of Computing Technology, CAS )
     *       link:http://www.cnblogs.com/haippy/archive/2013/02/21/2920426.html
     * =============================================================================
     */
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <zookeeper/zookeeper.h>
    #include <zookeeper/zookeeper_log.h>
    
    void zktest_watcher_g(zhandle_t* zh, int type, int state,
            const char* path, void* watcherCtx)
    {
        printf("Something happened.\n");
        printf("type: %d\n", type);
        printf("state: %d\n", state);
        printf("path: %s\n", path);
        printf("watcherCtx: %s\n", (char *)watcherCtx);
    }
    
    void zktest_dump_stat(const struct Stat *stat)
    {
        char tctimes[40];
        char tmtimes[40];
        time_t tctime;
        time_t tmtime;
    
        if (!stat) {
            fprintf(stderr,"null\n");
            return;
        }
        tctime = stat->ctime/1000;
        tmtime = stat->mtime/1000;
           
        ctime_r(&tmtime, tmtimes);
        ctime_r(&tctime, tctimes);
           
        fprintf(stderr, "\tctime = %s\tczxid=%llx\n"
        "\tmtime=%s\tmzxid=%llx\n"
        "\tversion=%x\taversion=%x\n"
        "\tephemeralOwner = %llx\n",
         tctimes, stat->czxid,
         tmtimes, stat->mzxid,
        (unsigned int)stat->version, (unsigned int)stat->aversion,
        stat->ephemeralOwner);
    }
    
    void zktest_stat_completion(int rc, const struct Stat *stat, const void *data)
    {
        fprintf(stderr, "%s: rc = %d Stat:\n", (char*)data, rc);
        zktest_dump_stat(stat);
    }
    
    void zktest_void_completion(int rc, const void *data)
    {
        fprintf(stderr, "[%s]: rc = %d\n", (char*)(data==0?"null":data), rc);
    }
    
    void zktest_string_completion(int rc, const char *name, const void *data)
    {
        fprintf(stderr, "[%s]: rc = %d\n", (char*)(data==0?"null":data), rc);
        if (!rc) {
            fprintf(stderr, "\tname = %s\n", name);
        }
    }
    
    int main(int argc, const char *argv[])
    {
        const char* host = "127.0.0.1:2181,127.0.0.1:2182,"
            "127.0.0.1:2183,127.0.0.1:2184,127.0.0.1:2185";
        int timeout = 30000;
        
        zoo_set_debug_level(ZOO_LOG_LEVEL_WARN);
        zhandle_t* zkhandle = zookeeper_init(host,
                zktest_watcher_g, timeout, 0, "hello zookeeper.", 0);
        if (zkhandle == NULL) {
            fprintf(stderr, "Error when connecting to zookeeper servers...\n");
            exit(EXIT_FAILURE);
        }
    
        // struct ACL ALL_ACL[] = {{ZOO_PERM_ALL, ZOO_ANYONE_ID_UNSAFE}};
        // struct ACL_vector ALL_PERMS = {1, ALL_ACL};
        int ret = zoo_acreate(zkhandle, "/xyz", "hello", 5,
               &ZOO_OPEN_ACL_UNSAFE, 0 /* ZOO_SEQUENCE */,
               zktest_string_completion, "acreate");
        if (ret) {
            fprintf(stderr, "Error %d for %s\n", ret, "acreate");
            exit(EXIT_FAILURE);
        }
        ret = 0;
    
        ret = zoo_aexists(zkhandle, "/xyz", 1, zktest_stat_completion, "aexists");
        if (ret) {
            fprintf(stderr, "Error %d for %s\n", ret, "aexists");
            exit(EXIT_FAILURE);
        }
        ret = 0;
        // Wait for asynchronous zookeeper call done.
        getchar();
    
        ret = zoo_adelete(zkhandle, "/xyz", -1, zktest_void_completion, "adelete");
        if (ret) {
            fprintf(stderr, "Error %d for %s\n", ret, "adelete");
            exit(EXIT_FAILURE);
        }
        // Wait for asynchronous zookeeper call done.
        getchar();
    
        zookeeper_close(zkhandle);
    }
    编译命令:
         gcc -o zookeeper_test zookeeper_test.c -I/usr/local/include/c-client-src -L/usr/local/lib -lzookeeper_mt

     
    5 参考:
    (1)http://hi.baidu.com/raybin_yang/item/52fb4315ed99de05d0d66da2   configure --prefix 命令  默认安装位置
    (2)http://blog.chinaunix.net/uid-16989284-id-2303676.html  关于引入头文件,库
     
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  • 原文地址:https://www.cnblogs.com/lpshou/p/3137318.html
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