主页 / server / 问题 / 994427
Accepted
ZedTuX
Asked: 2019-12-06 03:28:28 +0800 CST

Keepalived 在 Tinc VPN 网格中，选举后无法 ping VIP

  • 772

描述

配置

我有 3 个节点，使用 Tinc VPN 连接在一起，我想在其中安装 HAproxy 并拥有一个 VIP，以便 HAproxy 本身处于高可用性模式。

以下是节点详细信息：

  • 节点 1在接口vpn上的 IP 地址为10.0.0.222/32
  • 节点 2在接口vpn上的 IP 地址为10.0.0.13/32
  • 节点 3在接口vpn上的 IP 地址为10.0.0.103/32

为此，我keepalived在每台机器上都安装了。

我还启用了以下 sysctl：

net.ipv4.ip_forward = 1
net.ipv4.ip_nonlocal_bind = 1

节点 1 具有以下/etc/keepalived/keepalived.conf文件：

global_defs {
  enable_script_security
  router_id node-1
}

vrrp_script haproxy-check {
    script "/usr/bin/killall -0 haproxy"
    interval 2
    weight 2
}

vrrp_instance haproxy-vip {
    state MASTER
    priority 150
    interface vpn
    virtual_router_id 1
    advert_int 1

    virtual_ipaddress {
        10.0.0.1/32
    }

    track_script {
        haproxy-check
    }
}

节点 2 和 3 具有以下/etc/keepalived/keepalived.conf文件：

global_defs {
  enable_script_security
  router_id node-2 # Node 3 has "node-3" here.
}

vrrp_script haproxy-check {
    script "/usr/bin/killall -0 haproxy"
    interval 2
    weight 2
}

vrrp_instance haproxy-vip {
    state BACKUP
    priority 100
    interface vpn
    virtual_router_id 1
    advert_int 1

    virtual_ipaddress {
        10.0.0.1/32
    }

    track_script {
        haproxy-check
    }
}

当所有节点都在运行keepalived时，节点 1 是主节点，并且 VIP10.0.0.1配置良好，其他 2 个节点 ping 它。

节点 1 日志

启动时的日志keepalived：

Dec  5 14:07:53 node-1 systemd[1]: Starting Keepalive Daemon (LVS and VRRP)...
Dec  5 14:07:53 node-1 Keepalived[5870]: Starting Keepalived v1.3.2 (12/03,2016)
Dec  5 14:07:53 node-1 systemd[1]: Started Keepalive Daemon (LVS and VRRP).
Dec  5 14:07:53 node-1 Keepalived[5870]: WARNING - default user 'keepalived_script' for script execution does not exist - please create.
Dec  5 14:07:53 node-1 Keepalived[5870]: Opening file '/etc/keepalived/keepalived.conf'.
Dec  5 14:07:53 node-1 Keepalived[5871]: Starting Healthcheck child process, pid=5872
Dec  5 14:07:53 node-1 Keepalived_healthcheckers[5872]: Initializing ipvs
Dec  5 14:07:53 node-1 Keepalived_healthcheckers[5872]: Registering Kernel netlink reflector
Dec  5 14:07:53 node-1 Keepalived_healthcheckers[5872]: Registering Kernel netlink command channel
Dec  5 14:07:53 node-1 Keepalived_healthcheckers[5872]: Opening file '/etc/keepalived/keepalived.conf'.
Dec  5 14:07:53 node-1 Keepalived[5871]: Starting VRRP child process, pid=5873
Dec  5 14:07:53 node-1 Keepalived_vrrp[5873]: Registering Kernel netlink reflector
Dec  5 14:07:53 node-1 Keepalived_vrrp[5873]: Registering Kernel netlink command channel
Dec  5 14:07:53 node-1 Keepalived_vrrp[5873]: Registering gratuitous ARP shared channel
Dec  5 14:07:53 node-1 Keepalived_vrrp[5873]: Opening file '/etc/keepalived/keepalived.conf'.
Dec  5 14:07:53 node-1 Keepalived_healthcheckers[5872]: Using LinkWatch kernel netlink reflector...
Dec  5 14:07:53 node-1 Keepalived_vrrp[5873]: Using LinkWatch kernel netlink reflector...
Dec  5 14:07:53 node-1 Keepalived_vrrp[5873]: VRRP_Script(haproxy-check) succeeded
Dec  5 14:07:54 node-1 Keepalived_vrrp[5873]: VRRP_Instance(haproxy-vip) Transition to MASTER STATE
Dec  5 14:07:54 node-1 Keepalived_vrrp[5873]: VRRP_Instance(haproxy-vip) Changing effective priority from 150 to 152
Dec  5 14:07:55 node-1 Keepalived_vrrp[5873]: VRRP_Instance(haproxy-vip) Entering MASTER STATE
Dec  5 14:07:57 node-1 ntpd[946]: Listen normally on 45 vpn 10.0.0.1:123

节点 1 ip addr：

vpn: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 500
link/none
inet 10.0.0.222/24 scope global vpn
   valid_lft forever preferred_lft forever
inet 10.0.0.1/24 scope global secondary vpn
   valid_lft forever preferred_lft forever

节点 2 和 3 日志

Dec  5 14:14:32 node-2 systemd[1]: Starting Keepalive Daemon (LVS and VRRP)...
Dec  5 14:14:32 node-2 Keepalived[13745]: Starting Keepalived v1.3.2 (12/03,2016)
Dec  5 14:14:32 node-2 Keepalived[13745]: WARNING - default user 'keepalived_script' for script execution does not exist - please create.
Dec  5 14:14:32 node-2 Keepalived[13745]: Opening file '/etc/keepalived/keepalived.conf'.
Dec  5 14:14:32 node-2 Keepalived[13746]: Starting Healthcheck child process, pid=13747
Dec  5 14:14:32 node-2 Keepalived_healthcheckers[13747]: Initializing ipvs
Dec  5 14:14:32 node-2 systemd[1]: Started Keepalive Daemon (LVS and VRRP).
Dec  5 14:14:32 node-2 Keepalived_healthcheckers[13747]: Registering Kernel netlink reflector
Dec  5 14:14:32 node-2 Keepalived_healthcheckers[13747]: Registering Kernel netlink command channel
Dec  5 14:14:32 node-2 Keepalived[13746]: Starting VRRP child process, pid=13748
Dec  5 14:14:32 node-2 Keepalived_healthcheckers[13747]: Opening file '/etc/keepalived/keepalived.conf'.
Dec  5 14:14:32 node-2 Keepalived_vrrp[13748]: Registering Kernel netlink reflector
Dec  5 14:14:32 node-2 Keepalived_vrrp[13748]: Registering Kernel netlink command channel
Dec  5 14:14:32 node-2 Keepalived_vrrp[13748]: Registering gratuitous ARP shared channel
Dec  5 14:14:32 node-2 Keepalived_vrrp[13748]: Opening file '/etc/keepalived/keepalived.conf'.
Dec  5 14:14:32 node-2 Keepalived_healthcheckers[13747]: Using LinkWatch kernel netlink reflector...
Dec  5 14:14:32 node-2 Keepalived_vrrp[13748]: Using LinkWatch kernel netlink reflector...
Dec  5 14:14:32 node-2 Keepalived_vrrp[13748]: VRRP_Instance(haproxy-vip) Entering BACKUP STATE
Dec  5 14:14:32 node-2 Keepalived_vrrp[13748]: VRRP_Script(haproxy-check) succeeded
Dec  5 14:14:33 node-2 Keepalived_vrrp[13748]: VRRP_Instance(haproxy-vip) Changing effective priority from 100 to 102

节点 2 和 3 ip addr：

节点 2

vpn: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 500
link/none
inet 10.0.0.13/24 scope global vpn
   valid_lft forever preferred_lft forever

节点 3

vpn: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 500
link/none
inet 10.0.0.103/24 scope global vpn
   valid_lft forever preferred_lft forever

问题

但是，当我停keepalived在节点 1 上时，节点 3 被选为主节点，并注册了 VIP，只有节点 3 ping 10.0.0.1。

节点 1 日志

停止时：

Dec  5 14:15:26 node-1 systemd[1]: Stopping Keepalive Daemon (LVS and VRRP)...
Dec  5 14:15:26 node-1 Keepalived[5871]: Stopping
Dec  5 14:15:26 node-1 Keepalived_healthcheckers[5872]: Stopped
Dec  5 14:15:26 node-1 Keepalived_vrrp[5873]: VRRP_Instance(haproxy-vip) sent 0 priority
Dec  5 14:15:27 node-1 Keepalived_vrrp[5873]: Stopped
Dec  5 14:15:27 node-1 Keepalived[5871]: Stopped Keepalived v1.3.2 (12/03,2016)
Dec  5 14:15:27 node-1 systemd[1]: Stopped Keepalive Daemon (LVS and VRRP).
Dec  5 14:15:28 node-1 ntpd[946]: Deleting interface #45 vpn, 10.0.0.1#123, interface stats: received=0, sent=0, dropped=0, active_time=451 secs

节点 1 ip addr：

vpn: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 500
link/none
inet 10.0.0.222/24 scope global vpn
   valid_lft forever preferred_lft forever

节点 2 日志

Dec  5 14:15:27 node-2 Keepalived_vrrp[13748]: VRRP_Instance(haproxy-vip) Transition to MASTER STATE
Dec  5 14:15:27 node-2 Keepalived_vrrp[13748]: VRRP_Instance(haproxy-vip) Received advert with higher priority 102, ours 102
Dec  5 14:15:27 node-2 Keepalived_vrrp[13748]: VRRP_Instance(haproxy-vip) Entering BACKUP STATE

节点 2 ip addr：

vpn: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 500
link/none
inet 10.0.0.13/24 scope global vpn
   valid_lft forever preferred_lft forever

节点 3 日志

Dec  5 14:15:27 node-3 Keepalived_vrrp[31252]: VRRP_Instance(haproxy-vip) Transition to MASTER STATE
Dec  5 14:15:27 node-3 Keepalived_vrrp[31252]: VRRP_Instance(haproxy-vip) Received advert with lower priority 102, ours 102, forcing new election
Dec  5 14:15:28 node-3 Keepalived_vrrp[31252]: VRRP_Instance(haproxy-vip) Entering MASTER STATE
Dec  5 14:15:29 node-3 ntpd[27734]: Listen normally on 36 vpn 10.0.0.1:123

节点 3 ip addr：

vpn: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 500
link/none
inet 10.0.0.103/24 scope global vpn
   valid_lft forever preferred_lft forever
inet 10.0.0.1/24 scope global secondary vpn
   valid_lft forever preferred_lft forever

更多细节

跟踪路由

我用来traceroute尝试获取有关该问题的更多信息。

当所有节点都在运行keepalived并且 ping VIP 无处不在时，traceroute显示所有节点：

$ traceroute 10.0.0.1
traceroute to 10.0.0.1 (10.0.0.1), 30 hops max, 60 byte packets
 1  10.0.0.1 (10.0.0.1)  0.094 ms  0.030 ms  0.019 ms

当keepalived节点1上停止时，节点3选举了，节点1无法弄清楚VIP在哪里：

$ traceroute 10.0.0.1
traceroute to 10.0.0.1 (10.0.0.1), 30 hops max, 60 byte packets
 1  * * *
 2  * * *
 ...
 29  * * *
 30  * * *

节点 2 期望节点 1 拥有 VIP：

$ traceroute 10.0.0.1
traceroute to 10.0.0.1 (10.0.0.1), 30 hops max, 60 byte packets
 1  10.0.0.222 (10.0.0.222)  0.791 ms  0.962 ms  1.080 ms
 2  * * *
 3  * * *
 ...

并且节点 3 有 VIP，所以它可以工作。

Tinc 设备类型

我阅读了一些邮件存档，建议DeviceType = tap在 Tinc 配置中使用 以便传输 ARP 包（据我了解），但它没有帮助。

实际上，随着选举的发生，我不确定 Tinc 是根本原因。

尝试不使用 Tinc

我更改了keepalived配置，使其使用公共互联网接口，使用单播。

我在每个节点上的每个 keepalived 配置中添加了以下块（这里是 for node-1）：

    unicast_src_ip XXX.XXX.XXX.XXX # node's public IP address
    unicast_peer {
        XXX.XXX.XXX.XXX # other node's public IP address
        XXX.XXX.XXX.XXX # other node's public IP address
    }

但是行为与上面描述的完全一样，所以 Tinc 不应该是相关的。

要求

谁能帮我找出问题所在并解决这个问题，以便在进行新的选举时，节点可以在新位置找到 VIP？

keepalived

1 个回答

  1. Best Answer

    Mode = switch我刚刚通过添加到我的 tinc.conf解决了类似的问题。

    我面临的问题与您描述的类似；keepalived 将按预期在我的 3 个节点之间转换我设置的虚拟 ip（指向一个简单的 nginx 服务器）。However, the only node able to reach the service was the elected MASTER. 这是因为路由表是从主机配置文件而不是从 ARP 数据静态构建的。

    我确实觉得很奇怪，你没有 tinc 的尝试失败了。当我更改配置以在具有路由器的本地网络上运行时，keepalived 和 haproxy 按预期运行，并且 vip 在路由器的 ARP 表中可见。您确定您为本地测试更改了 haproxy 和 keepalived 配置吗？

    祝你好运！

    参考：

    1. https://www.tinc-vpn.org/documentation/Main-configuration-variables.html
    2. https://www.tinc-vpn.org/pipermail/tinc/2010-February/002191.html
    • 1

相关问题