31 Mar
2024
31 Mar
'24
9:37 p.m.
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### Description
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Explain what you did, what you expected to happen, and what actually happened.
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### Troubleshooting
#### Reproduction
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#### Debugging Data
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```
I want to read params from environment, so define
#!defenv MYSQL_IP
#!trydef DBURL "mysql://kamailio:kamailio@MYSQL_IP/kamailio"
but It can't read this ”MYSQL_IP“。
root@d2e1fcc3f89e:/# env |grep MYSQL*
MYSQL_URL=172.16.4.111
MYSQL_IP=172.16.4.111
```
#### Log Messages
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Check the syslog file and if there are relevant log messages printed by Kamailio, add them
next, or attach to issue, or provide a link to download them (e.g., to a pastebin site).
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```
0(34) ERROR: db_mysql [km_my_con.c:166]: db_mysql_new_connection(): driver error: Unknown
server host 'MYSQL_IP' (-2)
0(34) ERROR: <core> [db.c:324]: db_do_init2(): could not add connection to the
pool
0(34) ERROR: dispatcher [dispatch.c:955]: ds_connect_db(): cannot initialize db
connection
0(34) ERROR: dispatcher [dispatch.c:989]: ds_init_db(): unable to connect to the
database
0(34) ERROR: dispatcher [dispatcher.c:439]: mod_init(): could not initiate a connect to
the database
0(34) ERROR: <core> [core/sr_module.c:1030]: init_mod(): Error while initializing
module dispatcher (/usr/lib/x86_64-linux-gnu/kamailio/modules/dispatcher.so)
```
#### SIP Traffic
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```
(paste your sip traffic here)
```
### Possible Solutions
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request with a fix.
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### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
version: kamailio 5.7.4 (x86_64/linux)
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST,
DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, MEM_JOIN_FREE, Q_MALLOC, F_MALLOC, TLSF_MALLOC,
DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER,
USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535,
DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled with gcc 12.2.0
```
* **Operating System**:
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CentOS 7.1, ...), MacOS, xBSD, Solaris, ...;
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```
cat /proc/version
Linux version 3.10.0-1160.105.1.el7.x86_64 (mockbuild(a)kbuilder.bsys.centos.org) (gcc
version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) ) #1 SMP Thu Dec 7 15:39:45 UTC 2023
```
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