rsync“连接拒绝”错误

Question

rsync给了我一个“拒绝连接”的错误，这让我变得很疯狂。我的问题是:我有两台用来存储数据的服务器，rsync安装在上面，因为我需要这两台服务器保持同步。这样，一个服务器上的修改将导致对另一个服务器进行相同的修改，反之亦然。第一个节点(sn1)工作，而第二个节点(sn2)不工作。在细节上。- sn1的ip地址为192.168.13.131，sn2的ip地址为192.168.13.132。

如果我从sn1或sn2中给出了rsync rsync://182.168.13.132，它会运行得很好；而如果我从sn1或sn2中给出了rsync rsync://182.168.13.132，则会得到以下错误：

rsync: failed to connect to 192.168.13.132 (192.168.13.132): Connection refused (111)
rsync error: error in socket IO (code 10) at clientserver.c(125) [Receiver=3.1.2]

以下是关于sn2的一些信息。/etc/rsyncd.conf

uid = swift
gid = swift
log file = /var/log/rsyncd.log
pid file = /var/run/rsyncd.pid
address = 192.168.130.132

[account]
max connections = 20
path = /srv/node/
read only = False
lock file = /var/lock/account.lock

[container]
max connections = 20
path = /srv/node/
read only = False
lock file = /var/lock/container.lock

[object]
max connections = 20
path = /srv/node/
read only = False
lock file = /var/lock/object.lock

和/etc/default/rsync

# defaults file for rsync daemon mode
#
# This file is only used for init.d based systems!
# If this system uses systemd, you can specify options etc. for rsync
# in daemon mode by copying /lib/systemd/system/rsync.service to
# /etc/systemd/system/rsync.service and modifying the copy; add required
# options to the ExecStart line.

# start rsync in daemon mode from init.d script?
#  only allowed values are "true", "false", and "inetd"
#  Use "inetd" if you want to start the rsyncd from inetd,
#  all this does is prevent the init.d script from printing a message
#  about not starting rsyncd (you still need to modify inetd's config yourself).
RSYNC_ENABLE=true

# which file should be used as the configuration file for rsync.
# This file is used instead of the default /etc/rsyncd.conf
# Warning: This option has no effect if the daemon is accessed
#          using a remote shell. When using a different file for
#          rsync you might want to symlink /etc/rsyncd.conf to
#          that file.
# RSYNC_CONFIG_FILE=

# what extra options to give rsync --daemon?
#  that excludes the --daemon; that's always done in the init.d script
#  Possibilities are:
#   --address=123.45.67.89              (bind to a specific IP address)
#   --port=8730                         (bind to specified port; default 873)
RSYNC_OPTS=''

# run rsyncd at a nice level?
#  the rsync daemon can impact performance due to much I/O and CPU usage,
#  so you may want to run it at a nicer priority than the default priority.
#  Allowed values are 0 - 19 inclusive; 10 is a reasonable value.
RSYNC_NICE=''

# run rsyncd with ionice?
#  "ionice" does for IO load what "nice" does for CPU load.
#  As rsync is often used for backups which aren't all that time-critical,
#  reducing the rsync IO priority will benefit the rest of the system.
#  See the manpage for ionice for allowed options.
#  -c3 is recommended, this will run rsync IO at "idle" priority. Uncomment
#  the next line to activate this.
# RSYNC_IONICE='-c3'

# Don't forget to create an appropriate config file,
# else the daemon will not start.

现在是一些原木。/var/log/rsyncd.log

2018/05/04 15:10:16 [889] rsyncd version 3.1.2 starting, listening on port 873
2018/05/04 15:10:16 [889] bind() failed: Cannot assign requested address (address-family 2)
2018/05/04 15:10:16 [889] unable to bind any inbound sockets on port 873
2018/05/04 15:10:16 [889] rsync error: error in socket IO (code 10) at socket.c(555) [Receiver=3.1.2]

ps aux | grep rsync命令在sn2上的输出：

sn2       1555  0.0  0.1  13136  1060 pts/0    S+   15:46   0:00 grep --color=auto rsync

ps aux | grep rsync命令在sn1上的输出：

sn1      12875  0.0  0.1  13136  1012 pts/0    S+   15:48   0:00 grep --color=auto rsync
root     21281  0.0  0.2  12960  2800 ?        Ss   13:31   0:00 /usr/bin/rsync --daemon --no-detach

--这是我看到的两个节点之间的主要区别.

命令sudo systemctl status rsync在sn1上的输出：

rsync.service - fast remote file copy program daemon
   Loaded: loaded (/lib/systemd/system/rsync.service; enabled; vendor preset: enabled)
   Active: active (running) since Fri 2018-05-04 13:31:10 UTC; 2h 19min ago
 Main PID: 21281 (rsync)
    Tasks: 1 (limit: 1113)
   CGroup: /system.slice/rsync.service
           └─21281 /usr/bin/rsync --daemon --no-detach

May 04 13:31:10 sn1 systemd[1]: Started fast remote file copy program daemon.

Sn2中相同命令的输出：

rsync.service - fast remote file copy program daemon
   Loaded: loaded (/lib/systemd/system/rsync.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Fri 2018-05-04 15:10:16 UTC; 41min ago
  Process: 889 ExecStart=/usr/bin/rsync --daemon --no-detach (code=exited, status=10)
 Main PID: 889 (code=exited, status=10)

May 04 15:10:15 sn2 systemd[1]: Started fast remote file copy program daemon.
May 04 15:10:16 sn2 systemd[1]: rsync.service: Main process exited, code=exited, status=10/n/a
May 04 15:10:16 sn2 systemd[1]: rsync.service: Failed with result 'exit-code'.

命令sudo netstat -lptu | grep rsync在sn1上的输出：

tcp        0      0 sn1:rsync               0.0.0.0:*               LISTEN      21281/rsync

在sn2的时候它什么也不回..。

最后，sn2 /etc/主机包含

127.0.0.1       localhost.localdomain   localhost
::1             localhost6.localdomain6 localhost6


#ADDED BY ME
#10.0.2.15       sn2
192.168.13.130  proxy-server
192.168.13.131  sn1
192.168.13.132  sn2
#192.168.13.133  sn3
#192.168.13.134  sn4

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

以及sn1：

127.0.0.1       localhost.localdomain   localhost
::1             localhost6.localdomain6 localhost6


#ADDED BY ME
#10.0.2.15       sn1
192.168.13.130  proxy-server
192.168.13.131  sn1
192.168.13.132  sn2
#192.168.13.133  sn3
#192.168.13.134  sn4

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

我正在虚拟机上的每个服务器节点上运行ubuntu18.04。你能帮我弄清楚发生了什么吗？不幸的是，我必须使用rsync，因为我正在使用OpenStack Swift，因此不允许更改:)

Answer 1

好吧我已经做好了。简单来说，只需获得超级用户权限，然后启用并启动rsync进程：

sudo su

输入密码，然后输入数字

systemctl enable rsync
systemctl start rsync

如果您没有基于systemctl的终端，只需使用"service“即可。

service rsync restart

您可以通过访问/var/log/rsyncd.log来检查rsync现在是否工作。bind()错误现在消失了。

Answer 2

对于默认配置，我总是使用rsync -rtP /home/me/source/ x.x.x.x:/home/someoneelse/source (其中x.x是一个实际的IP地址)。我不知道何时或是否需要将rsync://指定为协议。在我的例子中，在启用sshd之前，我遇到了您的错误。我还安装了rsync-守护进程，但实际上不知道是否需要。以下是整个解决方案(我只在远程计算机上这样做--我相信本地计算机，然后我可以成功地运行上面的命令，只有openssh和rsync包)：

sudo dnf -y install rsync-daemon openssh
sudo systemctl enable rsyncd
sudo systemctl start rsyncd
sudo systemctl enable sshd
sudo systemctl start sshd

要明确的是，我有Fedora 27，sudo systemctl status firewalld说防火墙正在运行，我不需要手动创建我知道的防火墙规则(在我的bash历史记录中没有防火墙或iptables的实例)。在成功运行的命令(在这个答案的顶部)中，我使用了一些选项，但它们不是必需的：r：递归，t：将时间戳复制到目标文件，P：显示进度。正斜杠(/)仅位于源路径的末尾，因此rsync不会在目标中创建一个名为/home/某人/源/源的目录。