82 lines
2.8 KiB
Markdown
82 lines
2.8 KiB
Markdown
---
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title: "Examples"
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date: 2019-11-15T23:25:46+01:00
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draft: false
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---
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## CLI Examples
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Assumes the `lego` binary has permission to bind to ports 80 and 443.
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You can get a pre-built binary from the [releases](https://github.com/go-acme/lego/releases) page.
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If your environment does not allow you to bind to these ports, please read [Port Usage](usage/cli#port-usage).
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### Obtain a certificate
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```bash
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lego --email="foo@bar.com" --domains="example.com" --http run
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```
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(Find your certificate in the `.lego` folder of current working directory.)
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### To renew the certificate
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```bash
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lego --email="foo@bar.com" --domains="example.com" --http renew
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```
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### To renew the certificate only if it expires within 45 days
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```bash
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lego --email="foo@bar.com" --domains="example.com" --http renew --days 45
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```
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### To renew the certificate (and hook)
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The hook is executed only when the certificates are effectively renewed.
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```bash
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lego --email="foo@bar.com" --domains="example.com" --http renew --renew-hook="./myscript.sh"
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```
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Some information are added to the environment variables when the hook is used:
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- `LEGO_ACCOUNT_EMAIL`: the email of the account.
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- `LEGO_CERT_DOMAIN`: the main domain of the certificate.
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- `LEGO_CERT_PATH`: the path of the certificate.
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- `LEGO_CERT_KEY_PATH`: the path of the certificate key.
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### Obtain a certificate using the DNS challenge
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```bash
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AWS_REGION=us-east-1 \
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AWS_ACCESS_KEY_ID=my_id \
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AWS_SECRET_ACCESS_KEY=my_key \
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lego --email="foo@bar.com" --domains="example.com" --dns="route53" run
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```
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### Obtain a certificate given a certificate signing request (CSR) generated by something else
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```bash
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lego --email="foo@bar.com" --http --csr=/path/to/csr.pem run
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```
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(lego will infer the domains to be validated based on the contents of the CSR, so make sure the CSR's Common Name and optional SubjectAltNames are set correctly.)
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## Misc HTTP-01 CLI Examples
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### Write HTTP-01 token to already "served" directory
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If you have an existing server running on port 80 the `--http` option needs to also use the `--http.webroot` option.
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This just writes the token to the given directory in the folder `.well-known/acme-challenge` and does not start a server.
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The given directory **should** be publicly served as `/` on the domain(s) for the validation to complete.
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If the given directory is not publicly served you will have to support rewriting the request to the directory;
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You could also implement a rewrite to rewrite `.well-known/acme-challenge` to the given directory `.well-known/acme-challenge`.
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You should be able to run an existing webserver on port 80 and have lego write the token file with the HTTP-01 challenge key authorization to `<webroot dir>/.well-known/acme-challenge/` by running something like:
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```bash
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lego --accept-tos -m foo@bar.com --http --http.webroot /path/to/webroot -d example.com run
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```
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