DB2 db2icrt The host name "xxx" is invalid. Specify a valid host name

偏执的太偏执、 2022-09-18 13:45 94阅读 0赞

有这样一个现象，在DB2安装后，使用db2icrt 来创建实例时，提示主机名无效，提示如下：

[root@centos-0 instance]# ./db2icrt -u db2inst1 db2inst1
    The host name "centos-0.msdomain" is invalid. Specify a valid host name. 
    DBI1922N  The host name is not valid.
    
    Explanation: 
    
    The TCP/IP host name parameter is not valid or does not exist.
    
    User response: 
    
    Ensure that TCP/IP is operational on the system. If a domain name server
    is used, ensure that the domain name server machine is active. Issue the
    command again using the correct TCP/IP host name.
    
    
    DBI1079I  Output is saved in the log file /tmp/db2icrt.log.2816.
    
    Explanation: 
    
    All processed and failed operations have been saved into this log file.
    
    User response: 
    
    Do not modify this file in any way. This file is for IBM Technical
    Support reference.
    
    
    /opt/ibm/db2/V9.7/instance/db2iutil: line 2528: DB2INSTVER: parameter null or not set

检查 /opt/ibm/db2/V9.7/instance/db2iutil 文件（非提示的2528行），发现有如下内容

${DB2DIR?}/instance/db2isrv -addfcm -i ${INSTNAME?} ${DB2ISRVOPTS?}
    
    
     if [ $? -eq 3 ]; then
    
    db2isrv
    
    
    
    ${DB2DIR?}/instance/db2isrv -addfcm -i ${INSTNAME?} ${DB2ISRVOPTS?}
            if [ $? -eq 3 ]; then
                display_msg ${DB2CAT?} 922 \
                            'DBI1922N  The host name is not valid.\n'             stop_prog 1 fi 
     
    
    
    就是当db2isrv -addcfm -i ${INSTNAME?} ${DB2ISRVOPTS?} 返回为3的时候提示主机名称不正确。
    
    这个db2isrv 找了很多东西，没找到具体的内容，看名字是给系统增加一个服务。后面是addfmc ，这个fmc是DB2的故障守护进程。
    
    这个是监测DB2实例正常运行，当实例异常宕机后，它会自动启动实例。那么以上的错误可以连起来了：
    
    再给系统增加一个DB2守护进程的时候失败了，原因是主机名不对。
    
    好的，看一下主机名定义
    
     
     [root@centos-0 instance]# hostname
    centos-0.msdomain这没问题
    
    再看 
     [root@centos-0 instance]# vi /etc/hosts
    127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
    ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
    
    这个地方不知为什么CENTOS装好之后没有修改，修改一下。修改后内容如下
    
     
     [root@centos-0 instance]# vi /etc/hosts
    127.0.0.1   localhost centos.msdomain localhost4 localhost4.localdomain4
    ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
    
    保存再次执行创建实例，正常