HAProxy 不转发到后端节点 - 显示 503 服务不可用
HAProxy does not forward to backend nodes - shows 503 Service unavailable
大家好,Overflowers,
我的 OpenStack 环境中有 2 个 Nginx Web 服务器。
我现在正在尝试使用 HAProxy 设置负载平衡。
Ubuntu 18 是所有服务器上的 OS。
将后端 IP 添加到默认配置。当我尝试通过浏览器连接到我的 LB 时,我得到:
“503 服务不可用”
目前我所知道的:
- 当我直接连接到后端时,后端可用。
- 我在 OpenStack GUI 中打开了正确的端口
- 我检查了 HAProxy 日志并发现了以下内容:
Oct 20 13:04:30 HA_Proxy haproxy[2361]: [ALERT] 293/130430 (2361) : Starting frontend haproxynode: cannot bind socket [91.250.78.208:80]
Oct 20 13:04:30 HA_Proxy haproxy[2361]: Proxy backendnodes started.
Oct 20 13:04:30 HA_Proxy haproxy[2361]: Proxy backendnodes started.
Oct 20 13:04:30 HA_Proxy haproxy[2361]: Proxy stats started.
Oct 20 13:04:30 HA_Proxy haproxy[2361]: Proxy stats started.
Oct 20 13:05:27 HA_Proxy haproxy[2399]: Proxy haproxynode started.
Oct 20 13:05:27 HA_Proxy haproxy[2399]: Proxy haproxynode started.
Oct 20 13:05:27 HA_Proxy haproxy[2399]: Proxy backendnodes started.
Oct 20 13:05:27 HA_Proxy haproxy[2399]: Proxy backendnodes started.
Oct 20 13:05:27 HA_Proxy haproxy[2399]: Proxy stats started.
Oct 20 13:05:27 HA_Proxy haproxy[2402]: Server backendnodes/node1 is DOWN, reason: Layer4 connection problem, info: "Connection refused", check duration: 0ms. 1 active and 0 backup servers left. 0 sessions acti$
我不知道如何处理“无法绑定套接字”消息,也许是配置中的内容:
global
log /dev/log local0
log /dev/log local1 notice
chroot /var/lib/haproxy
stats socket /run/haproxy/admin.sock mode 660 level admin
stats timeout 30s
user haproxy
group haproxy
daemon
# Default SSL material locations
ca-base /etc/ssl/certs
crt-base /etc/ssl/private
# Default ciphers to use on SSL-enabled listening sockets.
# For more information, see ciphers(1SSL). This list is from:
# https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
# An alternative list with additional directives can be obtained from
# https://mozilla.github.io/server-side-tls/ssl-config-generator/?server=haproxy
ssl-default-bind-ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:RSA+AESGCM:RSA+AES:!aNULL:!MD5:!DSS
ssl-default-bind-options no-sslv3
defaults
log global
mode http
option httplog
option dontlognull
timeout connect 5000
timeout client 50000
timeout server 50000
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http
frontend haproxynode
bind *:80
mode http
default_backend backendnodes
backend backendnodes
balance roundrobin
option forwardfor
http-request set-header X-Forwarded-Port %[dst_port]
http-request add-header X-Forwarded-Proto https if { ssl_fc }
option httpchk HEAD / HTTP/1.1\r\nHost:localhost
server node1 192.168.0.77:8080 check
server node2 192.168.0.76:8080 check
listen stats
bind :32700
stats enable
stats uri /
stats hide-version
stats auth someuser:password
有人知道我还能检查什么来解决问题吗?
另请注意,我在 8 月开始我的学徒生涯,几乎没有负载平衡或网络服务器的经验 =(
如果您收到 cannot bind socket
错误消息,请尝试 运行 以下命令
setsebool -P haproxy_connect_any=1
或者终止运行正在您要使用的端口上的服务,然后重新启动haproxy
$fuser -k <your_port>/tcp
$sudo systemctl restart haproxy
我把后台端口设置成8080,本来应该是80的,问题解决了
大家好,Overflowers,
我的 OpenStack 环境中有 2 个 Nginx Web 服务器。 我现在正在尝试使用 HAProxy 设置负载平衡。 Ubuntu 18 是所有服务器上的 OS。
将后端 IP 添加到默认配置。当我尝试通过浏览器连接到我的 LB 时,我得到:
“503 服务不可用”
目前我所知道的:
- 当我直接连接到后端时,后端可用。
- 我在 OpenStack GUI 中打开了正确的端口
- 我检查了 HAProxy 日志并发现了以下内容:
Oct 20 13:04:30 HA_Proxy haproxy[2361]: [ALERT] 293/130430 (2361) : Starting frontend haproxynode: cannot bind socket [91.250.78.208:80]
Oct 20 13:04:30 HA_Proxy haproxy[2361]: Proxy backendnodes started.
Oct 20 13:04:30 HA_Proxy haproxy[2361]: Proxy backendnodes started.
Oct 20 13:04:30 HA_Proxy haproxy[2361]: Proxy stats started.
Oct 20 13:04:30 HA_Proxy haproxy[2361]: Proxy stats started.
Oct 20 13:05:27 HA_Proxy haproxy[2399]: Proxy haproxynode started.
Oct 20 13:05:27 HA_Proxy haproxy[2399]: Proxy haproxynode started.
Oct 20 13:05:27 HA_Proxy haproxy[2399]: Proxy backendnodes started.
Oct 20 13:05:27 HA_Proxy haproxy[2399]: Proxy backendnodes started.
Oct 20 13:05:27 HA_Proxy haproxy[2399]: Proxy stats started.
Oct 20 13:05:27 HA_Proxy haproxy[2402]: Server backendnodes/node1 is DOWN, reason: Layer4 connection problem, info: "Connection refused", check duration: 0ms. 1 active and 0 backup servers left. 0 sessions acti$
我不知道如何处理“无法绑定套接字”消息,也许是配置中的内容:
global
log /dev/log local0
log /dev/log local1 notice
chroot /var/lib/haproxy
stats socket /run/haproxy/admin.sock mode 660 level admin
stats timeout 30s
user haproxy
group haproxy
daemon
# Default SSL material locations
ca-base /etc/ssl/certs
crt-base /etc/ssl/private
# Default ciphers to use on SSL-enabled listening sockets.
# For more information, see ciphers(1SSL). This list is from:
# https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
# An alternative list with additional directives can be obtained from
# https://mozilla.github.io/server-side-tls/ssl-config-generator/?server=haproxy
ssl-default-bind-ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:RSA+AESGCM:RSA+AES:!aNULL:!MD5:!DSS
ssl-default-bind-options no-sslv3
defaults
log global
mode http
option httplog
option dontlognull
timeout connect 5000
timeout client 50000
timeout server 50000
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http
frontend haproxynode
bind *:80
mode http
default_backend backendnodes
backend backendnodes
balance roundrobin
option forwardfor
http-request set-header X-Forwarded-Port %[dst_port]
http-request add-header X-Forwarded-Proto https if { ssl_fc }
option httpchk HEAD / HTTP/1.1\r\nHost:localhost
server node1 192.168.0.77:8080 check
server node2 192.168.0.76:8080 check
listen stats
bind :32700
stats enable
stats uri /
stats hide-version
stats auth someuser:password
有人知道我还能检查什么来解决问题吗?
另请注意,我在 8 月开始我的学徒生涯,几乎没有负载平衡或网络服务器的经验 =(
如果您收到 cannot bind socket
错误消息,请尝试 运行 以下命令
setsebool -P haproxy_connect_any=1
或者终止运行正在您要使用的端口上的服务,然后重新启动haproxy
$fuser -k <your_port>/tcp
$sudo systemctl restart haproxy
我把后台端口设置成8080,本来应该是80的,问题解决了