Unable to Connect to Localhost by Default When OLLAMA_HOST is Set to 0.0.0.0 #198

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2026-02-15T16:28:39-05:00

yindo commented

2026-02-15 16:28:39 -05:00

Originally created by @Tryanks on GitHub (Jan 5, 2025).

I set the environment variable OLLAMA_HOST to 0.0.0.0:11434, allowing it to serve the local network. At the same time, I am running some local applications written in Python on the same machine. I noticed that I cannot directly use from ollama import chat; instead, I must first specify client = Client("http://localhost:11434") before I can use client.chat.

I suspect this is because the ollama-python library also reads the OLLAMA_HOST environment variable and uses it as the default access address.

A possible fix would be to add a special case for handling 0.0.0.0 in the _parse_host method.

Originally created by @Tryanks on GitHub (Jan 5, 2025). I set the environment variable OLLAMA_HOST to 0.0.0.0:11434, allowing it to serve the local network. At the same time, I am running some local applications written in Python on the same machine. I noticed that I cannot directly use `from ollama import chat`; instead, I must first specify `client = Client("http://localhost:11434")` before I can use `client.chat`. I suspect this is because the ollama-python library also reads the OLLAMA_HOST environment variable and uses it as the default access address. A possible fix would be to add a special case for handling 0.0.0.0 in the `_parse_host` method.

yindo closed this issue

2026-02-15 16:28:39 -05:00

yindo commented

2026-02-15 16:28:39 -05:00

@lzu-tangym commented on GitHub (Feb 13, 2025):

I set the environment variable OLLAMA_HOST to 0.0.0.0:11434, allowing it to serve the local network. At the same time, I am running some local applications written in Python on the same machine. I noticed that I cannot directly use from ollama import chat; instead, I must first specify client = Client("http://localhost:11434") before I can use client.chat.

I suspect this is because the ollama-python library also reads the OLLAMA_HOST environment variable and uses it as the default access address.

A possible fix would be to add a special case for handling 0.0.0.0 in the _parse_host method.

i have the same question, do you find the solution ?

@lzu-tangym commented on GitHub (Feb 13, 2025): > I set the environment variable OLLAMA_HOST to 0.0.0.0:11434, allowing it to serve the local network. At the same time, I am running some local applications written in Python on the same machine. I noticed that I cannot directly use `from ollama import chat`; instead, I must first specify `client = Client("http://localhost:11434")` before I can use `client.chat`. > > I suspect this is because the ollama-python library also reads the OLLAMA_HOST environment variable and uses it as the default access address. > > A possible fix would be to add a special case for handling 0.0.0.0 in the `_parse_host` method. i have the same question, do you find the solution ?

yindo commented

2026-02-15 16:28:39 -05:00

@Tryanks commented on GitHub (Feb 13, 2025):

i have the same question, do you find the solution ?我有同样的问题，您找到解决方案了吗？

I don't know why this issue is not being considered as something that needs to be resolved. If possible, I would like to hear the thoughts of the main maintainer :(

To fix it, you can handle the captured values at the following two links to include the special case of 0.0.0.0:
https://github.com/ollama/ollama-python/blob/0561f427011cf93e65f3f4b0de60d814cc7a754a/ollama/_client.py#L92
https://github.com/ollama/ollama-python/blob/0561f427011cf93e65f3f4b0de60d814cc7a754a/ollama/_client.py#L1155
After making the changes, feel free to submit a pull request to the main repository to include this fix (if it constitutes a bug).

@Tryanks commented on GitHub (Feb 13, 2025): > i have the same question, do you find the solution ?我有同样的问题，您找到解决方案了吗？ I don't know why this issue is not being considered as something that needs to be resolved. If possible, I would like to hear the thoughts of the main maintainer :( --- To fix it, you can handle the captured values at the following two links to include the special case of 0.0.0.0: https://github.com/ollama/ollama-python/blob/0561f427011cf93e65f3f4b0de60d814cc7a754a/ollama/_client.py#L92 https://github.com/ollama/ollama-python/blob/0561f427011cf93e65f3f4b0de60d814cc7a754a/ollama/_client.py#L1155 After making the changes, feel free to submit a **pull request** to the main repository to include this fix (if it constitutes a bug).

yindo commented

2026-02-15 16:28:40 -05:00

@lzu-tangym commented on GitHub (Feb 13, 2025):

os.getenv

sorry, i can not understand how to fix it, can you show me more directly? besides, i try that langchain_ollama, chatollama(model) or ollamaembeddings(model), error "can not connect to ollama " appear! do you find that question？

@lzu-tangym commented on GitHub (Feb 13, 2025): > os.getenv sorry, i can not understand how to fix it, can you show me more directly? besides, i try that langchain_ollama, chatollama(model) or ollamaembeddings(model), error "can not connect to ollama " appear! do you find that question？

yindo commented

2026-02-15 16:28:40 -05:00

@lzu-tangym commented on GitHub (Feb 13, 2025):

i have the same question, do you find the solution ?我有同样的问题，您找到解决方案了吗？

I don't know why this issue is not being considered as something that needs to be resolved. If possible, I would like to hear the thoughts of the main maintainer :(

To fix it, you can handle the captured values at the following two links to include the special case of 0.0.0.0:

ollama-python/ollama/_client.py

Line 92 in 0561f42

base_url=_parse_host(host or os.getenv('OLLAMA_HOST')),

ollama-python/ollama/_client.py

Line 1155 in 0561f42

def _parse_host(host: Optional[str]) -> str:

After making the changes, feel free to submit a pull request to the main repository to include this fix (if it constitutes a bug).

could you help more directly, i do not understand your solution, thank you sincerely！

@lzu-tangym commented on GitHub (Feb 13, 2025): > > i have the same question, do you find the solution ?我有同样的问题，您找到解决方案了吗？ > > I don't know why this issue is not being considered as something that needs to be resolved. If possible, I would like to hear the thoughts of the main maintainer :( > > To fix it, you can handle the captured values at the following two links to include the special case of 0.0.0.0: > > [ollama-python/ollama/_client.py](https://github.com/ollama/ollama-python/blob/0561f427011cf93e65f3f4b0de60d814cc7a754a/ollama/_client.py#L92) > > Line 92 in [0561f42](/ollama/ollama-python/commit/0561f427011cf93e65f3f4b0de60d814cc7a754a) > > base_url=_parse_host(host or os.getenv('OLLAMA_HOST')), > > [ollama-python/ollama/_client.py](https://github.com/ollama/ollama-python/blob/0561f427011cf93e65f3f4b0de60d814cc7a754a/ollama/_client.py#L1155) > > Line 1155 in [0561f42](/ollama/ollama-python/commit/0561f427011cf93e65f3f4b0de60d814cc7a754a) > > def _parse_host(host: Optional[str]) -> str: > > After making the changes, feel free to submit a **pull request** to the main repository to include this fix (if it constitutes a bug). could you help more directly, i do not understand your solution, thank you sincerely！

yindo commented

2026-02-15 16:28:40 -05:00

@Tryanks commented on GitHub (Feb 13, 2025):

could you help more directly, i do not understand your solution, thank you sincerely！您能否更直接地提供帮助，我不明白您的解决方案，衷心感谢您！

If you do not want to contribute to this repository, the only way to solve this problem is to specify localhost as the URL. No further prompting, sorry : (

@Tryanks commented on GitHub (Feb 13, 2025): > could you help more directly, i do not understand your solution, thank you sincerely！您能否更直接地提供帮助，我不明白您的解决方案，衷心感谢您！ If you do not want to contribute to this repository, the **only way** to solve this problem is to specify `localhost` as the URL. No further prompting, sorry : (

yindo commented

2026-02-15 16:28:40 -05:00

@lzu-tangym commented on GitHub (Feb 13, 2025):

could you help more directly, i do not understand your solution, thank you sincerely！您能否更直接地提供帮助，我不明白您的解决方案，衷心感谢您！

If you do not want to contribute to this repository, the only way to solve this problem is to specify localhost as the URL. No further prompting, sorry : (

thank you very much， i think it is bug maybe? or our host not set correctly? hope someone else join us chat

@lzu-tangym commented on GitHub (Feb 13, 2025): > > could you help more directly, i do not understand your solution, thank you sincerely！您能否更直接地提供帮助，我不明白您的解决方案，衷心感谢您！ > > If you do not want to contribute to this repository, the **only way** to solve this problem is to specify `localhost` as the URL. No further prompting, sorry : ( thank you very much， i think it is bug maybe? or our host not set correctly? hope someone else join us chat

yindo commented

2026-02-15 16:28:40 -05:00

@YANG-Haruka commented on GitHub (Feb 17, 2025):

Yes I also find the same problem.
IF we set OLLAMA_HOST=0.0.0.0:11434,
ollama.list command will also not use. 😔

@YANG-Haruka commented on GitHub (Feb 17, 2025): Yes I also find the same problem. IF we set OLLAMA_HOST=0.0.0.0:11434, ollama.list command will also not use. 😔

yindo commented

2026-02-15 16:28:40 -05:00

@ParthSareen commented on GitHub (Apr 9, 2025):

This is expected behavior - probably surfaced with the httpx bump from a bit ago.

OLLAMA_HOST should not be 0.0.0.0 from the client side. It should be set to where your instance is or 127.0.0.1:11434 if local

See:
https://github.com/ollama/ollama-python/pull/491#issuecomment-2790636938

@ParthSareen commented on GitHub (Apr 9, 2025): This is expected behavior - probably surfaced with the httpx bump from a bit ago. `OLLAMA_HOST` **should not** be `0.0.0.0` from the client side. It should be set to where your instance is or `127.0.0.1:11434` if local See: https://github.com/ollama/ollama-python/pull/491#issuecomment-2790636938

yindo commented

2026-02-15 16:28:41 -05:00

@Tryanks commented on GitHub (Apr 9, 2025):

OLLAMA_HOST should not be 0.0.0.0 from the client side.

Setting OLLAMA_HOST to 0.0.0.0 is because it applies to the server side. In most cases involved in this topic, the client side and the server side run on the same computer.
If in such cases, the client side cannot access the local server side via 0.0.0.0:11434, it may be a BUG.

@Tryanks commented on GitHub (Apr 9, 2025): > `OLLAMA_HOST` **should not** be `0.0.0.0` from the client side. Setting OLLAMA_HOST to 0.0.0.0 is because it applies to the server side. In most cases involved in this topic, the client side and the server side run on the **same computer**. If in such cases, the client side cannot access the local server side via `0.0.0.0:11434`, it may be a BUG.

yindo commented

2026-02-15 16:28:41 -05:00

@ktos commented on GitHub (Apr 11, 2025):

Yes. I have ollama running on my machine and I want it to be available to other machines in my network. And on the same machine ("server") I want to use ollama client libraries.

Even more: I am using Windows where there is no easy way to set different set of environment variables for different processes, especially if Ollama is installing itself and running automatically.

Using same env variable for both client and server configuration is, in this case, the source of the issue :/

@ktos commented on GitHub (Apr 11, 2025): Yes. I have ollama running on my machine and I want it to be available to other machines in my network. And on the same machine ("server") I want to use ollama client libraries. Even more: I am using Windows where there is no easy way to set different set of environment variables for different processes, especially if Ollama is installing itself and running automatically. Using same env variable for both client and server configuration is, in this case, the source of the issue :/

yindo referenced this issue

2026-02-15 16:30:17 -05:00

[PR #198] [CLOSED] Bump ruff from 0.4.7 to 0.5.0 #408

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Reference: ollama/ollama-python#198