`oauth2_proxy` can be configured via [config file](#config-file), [command line options](#command-line-options) or [environment variables](#environment-variables).
To generate a strong cookie secret use `python -c 'import os,base64; print base64.urlsafe_b64encode(os.urandom(16))'`
### Config File
An example [oauth2_proxy.cfg](contrib/oauth2_proxy.cfg.example) config file is in the contrib directory. It can be used by specifying `-config=/etc/oauth2_proxy.cfg`
| `-cookie-httponly` | bool | set HttpOnly cookie flag | true |
| `-cookie-name` | string | the name of the cookie that the oauth_proxy creates | `"_oauth2_proxy"` |
| `-cookie-path` | string | an optional cookie path to force cookies to (ie: `/poc/`) | `"/"` |
| `-cookie-refresh` | duration | refresh the cookie after this duration; `0` to disable | |
| `-cookie-secret` | string | the seed string for secure cookies (optionally base64 encoded) | |
| `-cookie-secure` | bool | set secure (HTTPS) cookie flag | true |
| `-custom-templates-dir` | string | path to custom html templates | |
| `-display-htpasswd-form` | bool | display username / password login form if an htpasswd file is provided | true |
| `-email-domain` | string | authenticate emails with the specified domain (may be given multiple times). Use `*` to authenticate any email | |
| `-extra-jwt-issuers` | string | if `-skip-jwt-bearer-tokens` is set, a list of extra JWT `issuer=audience` pairs (where the issuer URL has a `.well-known/openid-configuration` or a `.well-known/jwks.json`) | |
| `-exclude-logging-paths` | string | comma separated list of paths to exclude from logging, eg: `"/ping,/path2"` |`""` (no paths excluded) |
| `-flush-interval` | duration | period between flushing response buffers when streaming responses | `"1s"` |
| `-banner` | string | custom banner string. Use `"-"` to disable default banner. | |
| `-footer` | string | custom footer string. Use `"-"` to disable default footer. | |
| `-gcp-healthchecks` | bool | will enable `/liveness_check`, `/readiness_check`, and `/` (with the proper user-agent) endpoints that will make it work well with GCP App Engine and GKE Ingresses | false |
| `-github-org` | string | restrict logins to members of this organisation | |
| `-github-team` | string | restrict logins to members of any of these teams (slug), separated by a comma | |
| `-gitlab-group` | string | restrict logins to members of any of these groups (slug), separated by a comma | |
| `-google-admin-email` | string | the google admin to impersonate for api calls | |
| `-google-group` | string | restrict logins to members of this google group (may be given multiple times). | |
| `-google-service-account-json` | string | the path to the service account json credentials | |
| `-htpasswd-file` | string | additionally authenticate against a htpasswd file. Entries must be created with `htpasswd -s` for SHA encryption | |
| `-http-address` | string | `[http://]<addr>:<port>` or `unix://<path>` to listen on for HTTP clients | `"127.0.0.1:4180"` |
| `-https-address` | string | `<addr>:<port>` to listen on for HTTPS clients | `":443"` |
| `-logging-compress` | bool | Should rotated log files be compressed using gzip | false |
| `-logging-filename` | string | File to log requests to, empty for `stdout` | `""` (stdout) |
| `-logging-local-time` | bool | Use local time in log files and backup filenames instead of UTC | true (local time) |
| `-logging-max-age` | int | Maximum number of days to retain old log files | 7 |
| `-logging-max-backups` | int | Maximum number of old log files to retain; 0 to disable | 0 |
| `-logging-max-size` | int | Maximum size in megabytes of the log file before rotation | 100 |
| `-jwt-key` | string | private key in PEM format used to sign JWT, so that you can say something like `-jwt-key="${OAUTH2_PROXY_JWT_KEY}"`: required by login.gov | |
| `-jwt-key-file` | string | path to the private key file in PEM format used to sign the JWT so that you can say something like `-jwt-key-file=/etc/ssl/private/jwt_signing_key.pem`: required by login.gov | |
| `-redis-connection-url` | string | URL of redis server for redis session storage (eg: `redis://HOST[:PORT]`) | |
| `-redis-sentinel-master-name` | string | Redis sentinel master name. Used in conjunction with `--redis-use-sentinel` | |
| `-redis-sentinel-connection-urls` | string \| list | List of Redis sentinel connection URLs (eg `redis://HOST[:PORT]`). Used in conjunction with `--redis-use-sentinel` | |
| `-redis-use-sentinel` | bool | Connect to redis via sentinels. Must set `--redis-sentinel-master-name` and `--redis-sentinel-connection-urls` to use this feature | false |
| `-silence-ping-logging` | bool | disable logging of requests to ping endpoint | false |
| `-skip-auth-preflight` | bool | will skip authentication for OPTIONS requests | false |
| `-skip-auth-regex` | string | bypass authentication for requests paths that match (may be given multiple times) | |
| `-skip-jwt-bearer-tokens` | bool | will skip requests that have verified JWT bearer tokens | false |
| `-skip-oidc-discovery` | bool | bypass OIDC endpoint discovery. `-login-url`, `-redeem-url` and `-oidc-jwks-url` must be configured in this case | false |
| `-skip-provider-button` | bool | will skip sign-in-page to directly reach the next step: oauth/start | false |
| `-ssl-insecure-skip-verify` | bool | skip validation of certificates presented when using HTTPS providers | false |
| `-ssl-upstream-insecure-skip-verify` | bool | skip validation of certificates presented when using HTTPS upstreams | false |
| `-standard-logging` | bool | Log standard runtime information | true |
| `-standard-logging-format` | string | Template for standard log lines | see [Logging Configuration](#logging-configuration) |
| `-whitelist-domain` | string \| list | allowed domains for redirection after authentication. Prefix domain with a `.` to allow subdomains (eg `.example.com`) | |
Note, when using the `whitelist-domain` option, any domain prefixed with a `.` will allow any subdomain of the specified domain as a valid redirect URL.
See below for provider specific options
### Upstreams Configuration
`oauth2_proxy` supports having multiple upstreams, and has the option to pass requests on to HTTP(S) servers or serve static files from the file system. HTTP and HTTPS upstreams are configured by providing a URL such as `http://127.0.0.1:8080/` for the upstream parameter, that will forward all authenticated requests to be forwarded to the upstream server. If you instead provide `http://127.0.0.1:8080/some/path/` then it will only be requests that start with `/some/path/` which are forwarded to the upstream.
Static file paths are configured as a file:// URL. `file:///var/www/static/` will serve the files from that directory at `http://[oauth2_proxy url]/var/www/static/`, which may not be what you want. You can provide the path to where the files should be available by adding a fragment to the configured URL. The value of the fragment will then be used to specify which path the files are available at. `file:///var/www/static/#/static/` will ie. make `/var/www/static/` available at `http://[oauth2_proxy url]/static/`.
Multiple upstreams can either be configured by supplying a comma separated list to the `-upstream` parameter, supplying the parameter multiple times or provinding a list in the [config file](#config-file). When multiple upstreams are used routing to them will be based on the path they are set up with.
By default, OAuth2 Proxy logs all output to stdout. Logging can be configured to output to a rotating log file using the `-logging-filename` command.
If logging to a file you can also configure the maximum file size (`-logging-max-size`), age (`-logging-max-age`), max backup logs (`-logging-max-backups`), and if backup logs should be compressed (`-logging-compress`).
There are three different types of logging: standard, authentication, and HTTP requests. These can each be enabled or disabled with `-standard-logging`, `-auth-logging`, and `-request-logging`.
Each type of logging has their own configurable format and variables. By default these formats are similar to the Apache Combined Log.
Logging of requests to the `/ping` endpoint can be disabled with `-silence-ping-logging` reducing log volume. This flag appends the `-ping-path` to `-exclude-logging-paths`.
Authentication logs are logs which are guaranteed to contain a username or email address of a user attempting to authenticate. These logs are output by default in the below format:
| Client | 74.125.224.72 | The client/remote IP address. Will use the X-Real-IP header it if exists. |
| Host | domain.com | The value of the Host header. |
| Protocol | HTTP/1.0 | The request protocol. |
| RequestDuration | 0.001 | The time in seconds that a request took to process. |
| RequestMethod | GET | The request method. |
| RequestURI | "/oauth2/auth" | The URI path of the request. |
| ResponseSize | 12 | The size in bytes of the response. |
| StatusCode | 200 | The HTTP status code of the response. |
| Timestamp | 19/Mar/2015:17:20:19 -0400 | The date and time of the logging event. |
| Upstream | - | The upstream data of the HTTP request. |
| UserAgent | - | The full user agent as reported by the requesting client. |
| Username | username@email.com | The email or username of the auth request. |
### Standard Log Format
All other logging that is not covered by the above two types of logging will be output in this standard logging format. This includes configuration information at startup and errors that occur outside of a session. The default format is below:
If you require a different format than that, you can configure it with the `-standard-logging-format` flag. The default format is configured as follows:
| Timestamp | 19/Mar/2015:17:20:19 -0400 | The date and time of the logging event. |
| File | main.go:40 | The file and line number of the logging statement. |
| Message | HTTP: listening on 127.0.0.1:4180 | The details of the log statement. |
## <a name="nginx-auth-request"></a>Configuring for use with the Nginx `auth_request` directive
The [Nginx `auth_request` directive](http://nginx.org/en/docs/http/ngx_http_auth_request_module.html) allows Nginx to authenticate requests via the oauth2_proxy's `/auth` endpoint, which only returns a 202 Accepted response or a 401 Unauthorized response without proxying the request through. For example:
You have to substitute *name* with the actual cookie name you configured via --cookie-name parameter. If you don't set a custom cookie name the variable should be "$upstream_cookie__oauth2_proxy_1" instead of "$upstream_cookie_name_1" and the new cookie-name should be "_oauth2_proxy_1=" instead of "name_1=".
