Ubuntu下zookeeper C client安装
1 安装zookeeper
（a)下载 zookeeper-x.y.z.tar.gz
（b)安装jdk：
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); }
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
