sergey-safarov commented on issue #4668:
URL: https://github.com/apache/couchdb/issues/4668#issuecomment-1628643750
on the server I have created file `/opt/couchdb/etc/local.d/replicator.ini`
with content
```
[replicator]
; See the `inet` Erlang module's man page for the full list of options.
socket_options = [{keepalive, true}, {nodelay, false}, {prefer_ipv6, true}]
; Valid socket options. Options not in this list are ignored. The full list
of
; options may be found at https://www.erlang.org/doc/man/inet.html#setopts-2.
valid_socket_options =
buffer,keepalive,nodelay,priority,recbuf,sndbuf,prefer_ipv6
```
Then I mounted this file into the docker container. The CouchDB container
started with this file mounted.
```bash
[root@ippbx-1b ~]# docker exec couch ls -l
/opt/couchdb/etc/local.d/replicator.ini
-rw-r--r--. 1 couchdb couchdb 403 Jul 10 09:53
/opt/couchdb/etc/local.d/replicator.ini
```
Started replications again and using tcpdump can see `A` DNS requests
```
10:00:49.900494 IP 127.0.0.1.42238 > 127.0.0.1.domain: 44128+ A?
ippbx-1a.la.nga911.com. (40)
10:00:49.900627 IP 127.0.0.1.domain > 127.0.0.1.42238: 44128* 0/1/0 (140)
10:00:49.900711 IP 127.0.0.1.52185 > 127.0.0.1.domain: 8288+ A?
ippbx-1a.la.nga911.com. (40)
10:00:49.900828 IP 127.0.0.1.domain > 127.0.0.1.52185: 8288* 0/1/0 (140)
```
I also have checked local node config after CouchDB restart. I see
`replicator` settings applied as expected.
```
[root@ippbx-1b ~]# curl -s -S
http://xxxxx:[email protected]:5984/_node/_local/_config | jq
{
"chttpd": {
"bind_address": "::",
"port": "5984"
},
"admins": {
"xxxxxx": "xxxxxxxxxxx"
},
"vendor": {
"name": "The Apache Software Foundation"
},
"feature_flags": {
"partitioned||*": "true"
},
"chttpd_auth": {
"hash_algorithms": "sha256, sha"
},
"replicator": {
"socket_options": "[{keepalive, true}, {nodelay, false}, {prefer_ipv6,
true}]",
"valid_socket_options":
"buffer,keepalive,nodelay,priority,recbuf,sndbuf,prefer_ipv6"
},
"log": {
"level": "error"
},
"indexers": {
"couch_mrview": "true"
},
"prometheus": {
"additional_port": "false",
"bind_address": "127.0.0.1",
"port": "17986"
},
"httpd": {
"bind_address": "::",
"port": "5986"
},
"smoosh": {
"state_dir": "./data"
},
"couch_httpd_auth": {
"authentication_db": "_users",
"secret": "c8bf8a8d517074d779a1a31a9dac75bd"
},
"couchdb_engines": {
"couch": "couch_bt_engine"
},
"couchdb": {
"database_dir": "./data",
"uuid": "065b865d8615b590a225292060d6c415",
"view_index_dir": "./data"
}
}
```
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