Docker-openldap: ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)

[Shriyanshmit]

I am following the below article in Ubuntu environment.

https://github.com/osixia/docker-openldap

Step:1
Pull the image with container name mycompanyname-container
docker run -p 389:389 -p 689:689 --name mycompanyname-container --detach osixia/openldap:1.2.2

Step2:
Then I search for default details which is working fine.
docker exec mycompanyname-container ldapsearch -x -H ldap://localhost -b dc=example,dc=org -D "cn=admin,dc=example,dc=org" -w admin

Step:3
Now i create a new server with below details which is created successfully but once i ran the search command in step 4 then it is throwing error.

docker run --env LDAP_ORGANISATION="My Company" --env LDAP_DOMAIN="my-company.com" \
--env LDAP_ADMIN_PASSWORD="JonSn0w" --detach osixia/openldap:1.2.2

Step:4
Once i ran the below command to search new server details it through the below error.

docker exec mycompanyname-container ldapsearch -x -H ldap://my-company.com -b dc=my-company,dc=com -D "cn=admin,dc=my-company,dc=com" -w JonSn0w

Error message
ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)

it is throwing the above error message please let me know is there any config setting required?

[simis2626]

I'm having the same issue and am interested to find out the issue

[jagland]

I've had the same issue when using environment variables via docker-compose. However, using a yaml file in a folder and then adding as a volume works fine.

This would be the contents of say /data/ldap/environment/env.yaml

LDAP_ORGANISASTION: My Company
LDAP_DOMAIN: my-company.com
LDAP_ADMIN_PASSWORD: JonSn0w

then roughly follow https://github.com/osixia/docker-openldap#link-environment-file
so add --volume /data/ldap/environment:/container/environment/01-custom to your docker run command.

Personally I'm using docker-compose, so I'd add the following in the relevant section

    volumes:
     -  /data/ldap/environment:/container/environment/01-custom

[OlivierBondu]

Not sure if this helps, but for the record I ran into a similar issue via docker-compose, and for me what saved the day was to move from this YML syntax:

    environment:
        - LDAP_ORGANISASTION=My Company
        - LDAP_DOMAIN=my-company.com
        - LDAP_ADMIN_PASSWORD=JonSn0w

to this one:

    environment:
        LDAP_ORGANISASTION: "My Company"
        LDAP_DOMAIN: "my-company.com"
        LDAP_ADMIN_PASSWORD: "JonSn0w"

Hope this helps

[obourdon]

The problem is that you are using -H ldap://my-company.com but my-company.com does not resolve properly within the container same command with -H ldap://localhost works like a charm

[obourdon]

Please also look into https://github.com/osixia/docker-openldap/issues/252 which might also explain your issue