simeon49 opened a new issue #3744:
URL: https://github.com/apache/apisix/issues/3744
### Issue description
最近在使用APISIX 的服务比较频繁的报 "{'http_status_code': 500, 'content': {'error_msg':
'etcd-node2 could not be resolved (3: Host not found)'}}" 错误,
我们的环境是通过docker-compose 启动, 注意: 这个在服务运行过程中不是一直包错, 而是比较频繁报这个错误
### Environment
* apisix version (cmd: `apisix version`): apisix 2.0 (docker image)
* OS (cmd: `uname -a`): Ubuntu 18.04
* OpenResty / Nginx version (cmd: `nginx -V` or `openresty -V`):
openresty/1.19.3.1
* etcd version, if have (cmd: run `curl
http://127.0.0.1:9090/v1/server_info` to get the info from server-info API):
etcd:3.4.9
* apisix-dashboard version, if have:
### docker-compose 配置:
```yaml
version: '3'
networks:
default:
external:
name: dev-network
services:
# --- API网关 ---
apisix:
container_name: apisix
image: apisix:2.0
restart: always
volumes:
-
./configs/apisix/config/config.yaml:/usr/local/apisix/conf/config.yaml:ro
- /data/apisix_log:/usr/local/apisix/logs
depends_on:
- etcd
ports:
- '8080:9080/tcp'
- '8443:9443/tcp'
# --- etcd ---
etcd:
container_name: etcd
image: bitnami/etcd:3.4.9
user: root
restart: always
volumes:
- /data/etcd_data:/etcd_data
environment:
ETCD_DATA_DIR: /etcd_data
ETCD_ENABLE_V2: "true"
ALLOW_NONE_AUTHENTICATION: "yes"
ETCD_ADVERTISE_CLIENT_URLS: "http://0.0.0.0:2379";
ETCD_LISTEN_CLIENT_URLS: "http://0.0.0.0:2379";
ports:
- '2379:2379/tcp'
networks:
default:
aliases:
- etcd
# ...other services ....
```
### config.yaml
```yaml
apisix:
node_listen: 9080 # APISIX listening port
enable_heartbeat: true
enable_admin: true
enable_admin_cors: true # Admin API support CORS response headers.
enable_debug: false
enable_dev_mode: false # Sets nginx worker_processes to 1 if set
to true
enable_reuseport: true # Enable nginx SO_REUSEPORT switch if set
to true.
enable_ipv6: true
config_center: etcd # etcd: use etcd to store the config value
# yaml: fetch the config value from local
yaml file `/your_path/conf/apisix.yaml`
#proxy_protocol: # Proxy Protocol configuration
# listen_http_port: 9181 # The port with proxy protocol for http,
it differs from node_listen and port_admin.
# This port can only receive http request
with proxy protocol, but node_listen & port_admin
# can only receive http request. If you
enable proxy protocol, you must use this port to
# receive http request with proxy protocol
# listen_https_port: 9182 # The port with proxy protocol for https
# enable_tcp_pp: true # Enable the proxy protocol for tcp
proxy, it works for stream_proxy.tcp option
# enable_tcp_pp_to_upstream: true # Enables the proxy protocol to the
upstream server
proxy_cache: # Proxy Caching configuration
cache_ttl: 10s # The default caching time if the
upstream does not specify the cache time
zones: # The parameters of a cache
- name: disk_cache_one # The name of the cache, administrator
can be specify
# which cache to use by name in the admin
api
memory_size: 50m # The size of shared memory, it's used to
store the cache index
disk_size: 1G # The size of disk, it's used to store
the cache data
disk_path: "/tmp/disk_cache_one" # The path to store the cache data
cache_levels: "1:2" # The hierarchy levels of a cache
# - name: disk_cache_two
# memory_size: 50m
# disk_size: 1G
# disk_path: "/tmp/disk_cache_two"
# cache_levels: "1:2"
allow_admin: #
http://nginx.org/en/docs/http/ngx_http_access_module.html#allow
- 127.0.0.0/12 # If we don't set any IP list, then any IP
access is allowed by default.
- 172.17.0.0/12
- 192.168.0.0/12
- 10.0.0.0/8
- "::/64"
# port_admin: 9180 # use a separate port
# Default token when use API to call for Admin API.
# *NOTE*: Highly recommended to modify this value to protect APISIX's
Admin API.
# Disabling this configuration item means that the Admin API does not
# require any authentication.
admin_key:
-
name: "admin"
key: frmGtg8EdhXhE0o0sYc3DU4823M2SOoW
role: admin # admin: manage all configuration data
# viewer: only can view configuration data
-
name: "viewer"
key: w43eJbMFDbiusHsmYCdwDe4oWqj3dnsT
role: viewer
router:
http: 'radixtree_uri' # radixtree_uri: match route by uri(base
on radixtree)
# radixtree_host_uri: match route by host
+ uri(base on radixtree)
ssl: 'radixtree_sni' # radixtree_sni: match route by SNI(base
on radixtree)
# stream_proxy: # TCP/UDP proxy
# tcp: # TCP proxy port list
# - 9100
# - 9101
# udp: # UDP proxy port list
# - 9200
# - 9211
dns_resolver: # default DNS resolver, with disable IPv6
and enable local DNS
- 127.0.0.11
- 114.114.114.114
- 223.5.5.5
- 1.1.1.1
- 8.8.8.8
dns_resolver_valid: 30 # valid time for dns result 30 seconds
resolver_timeout: 5 # resolver timeout
ssl:
enable: true
enable_http2: true
listen_port: 9443
ssl_protocols: "TLSv1 TLSv1.1 TLSv1.2 TLSv1.3"
ssl_ciphers:
"ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA256:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA"
nginx_config: # config for render the template to
genarate nginx.conf
error_log: "logs/error.log"
error_log_level: "warn" # warn,error
worker_rlimit_nofile: 20480 # the number of files a worker process can
open, should be larger than worker_connections
event:
worker_connections: 10620
http:
access_log: "logs/access.log"
keepalive_timeout: 60s # timeout during which a keep-alive
client connection will stay open on the server side.
client_header_timeout: 60s # timeout for reading client request
header, then 408 (Request Time-out) error is returned to the client
client_body_timeout: 60s # timeout for reading client request
body, then 408 (Request Time-out) error is returned to the client
send_timeout: 10s # timeout for transmitting a response to
the client.then the connection is closed
underscores_in_headers: "on" # default enables the use of underscores
in client request header fields
real_ip_header: "X-Real-IP" #
http://nginx.org/en/docs/http/ngx_http_realip_module.html#real_ip_header
real_ip_from: #
http://nginx.org/en/docs/http/ngx_http_realip_module.html#set_real_ip_from
- 127.0.0.1
- 'unix:'
#lua_shared_dicts: # add custom shared cache to nginx.conf
# ipc_shared_dict: 100m # custom shared cache, format:
`cache-key: cache-size`
etcd:
host: # it's possible to define multiple etcd
hosts addresses of the same etcd cluster.
- "http://etcd:2379"; # multiple etcd address
prefix: "/apisix" # apisix configurations prefix
timeout: 3 # 3 seconds
plugins: # plugin list
- example-plugin
- limit-req
- limit-count
- limit-conn
- key-auth
- basic-auth
- prometheus
- node-status
- jwt-auth
- zipkin
- ip-restriction
- grpc-transcode
- serverless-pre-function
- serverless-post-function
- openid-connect
- proxy-rewrite
- redirect
- response-rewrite
- fault-injection
- udp-logger
- wolf-rbac
- proxy-cache
- tcp-logger
- proxy-mirror
- kafka-logger
- cors
stream_plugins:
- mqtt-proxy
```
### What's the actual result? (including assertion message & call stack if
applicable)
Exception: {'http_status_code': 500, 'content': {'error_msg': 'etcd could
not be resolved (3: Host not found)'}}
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