rsync从远端到远端

环境：rsync中间机，源机host1，目标机host2

方案1. 先挂载

对于rsync来说，先挂载再拷贝有点多余，反正也是一个方案

注：sshfs需要从epel源中下载（当然nfs，ftp，等挂载也行）

例：

$ mkdir host1 host2
$ sshfs user1@host1:/path1 ./host1
$ sshfs user2@host2:/path2 ./host2
$ rsync -a ./host1/ ./host2/

方案2：一个挂载，一个rsync

算是一个，常用方案

挂载到中间机，上再进行rsync拷贝

mount -t nfs host2_ip:/tmp/share  /mnt/rsync
rsync -avzr --partial --progress --checksum --log-file=/var/log/rsync.log root@host1_ip:/share /mnt/rsync

方案3：远端到远端

利用ssh隧道技术，让rsync通过隧道直接连接

ssh -R 50000:host2:22 host1 'rsync -e "ssh -p 50000" -vuar /host1/path localhost:/host2/path'

脚本示例1

SOURCE_USER=user1
SOURCE_HOST=hostname1
SOURCE_PATH=path1

TARGET_USER=user2
TARGET_HOST=host2
TARGET_PATH=path2

ssh -l $TARGET_USER -A -R localhost:22000:$TARGET_HOST:22 \
$SOURCE_USER@$SOURCE_HOST "rsync -e 'ssh -p 22000' -vuar $SOURCE_PATH \
$TARGET_USER@localhost:$TARGET_PATH"

脚本示例2

echo -n "Test: ssh to $SOURCE_HOST: "
ssh $SOURCE_HOST echo PASSED| grep PASSED || exit 3

echo -n "Verifying path in $SOURCE_HOST "
ssh $SOURCE_HOST stat $SOURCE_PATH | grep "File:" || exit 5

echo -n "Verifying path in $TARGET_HOST "
ssh $TARGET_HOST stat $TARGET_PATH | grep "File:" || exit 5

echo "configuring ssh from $SOURCE_HOST to $TARGET_HOST via locahost"
ssh $SOURCE_HOST "echo \"Host tmpsshrs; ControlMaster auto; ControlPath /tmp/%u_%r@%h:%p; hostname localhost; port $FREE_PORT; user $TARGET_USER\" | tr ';' '\n'  > /tmp/tmpsshrs"

# The ssh options that will setup the tunnel
TUNNEL="-R localhost:$FREE_PORT:$TARGET_ADDR_PORT"

echo 
echo -n "Test: ssh to $SOURCE_HOST then to $TARGET_HOST: "
if ! ssh -A $TUNNEL $SOURCE_HOST "ssh -A -F /tmp/tmpsshrs tmpsshrs echo PASSED" | grep PASSED ; then
        echo
        echo "Direct authentication failed, will use plan #B:"
        echo "Please open another terminal, execute the following command"
        echo "and leave the session running until rsync finishes"
        echo "(if you're asked for password use the one for $TARGET_USER@$TARGET_HOST)"
        echo "   ssh -t -A $TUNNEL $SOURCE_HOST ssh -F /tmp/tmpsshrs tmpsshrs"
        read -p "Press [Enter] when done..."
fi

echo "Starting rsync"
ssh -A $TUNNEL $SOURCE_HOST "rsync -e 'ssh -F /tmp/tmpsshrs' $RSYNC_OPTS $SOURCE_PATH tmpsshrs:$TARGET_PATH"

echo
echo "Cleaning up"
ssh $SOURCE_HOST "rm /tmp/tmpsshrs"