82 lines
2.9 KiB
Markdown
82 lines
2.9 KiB
Markdown
---
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title: HTTPS and authentication
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sort_rank: 11
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---
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# HTTPS and authentication
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Alertmanager supports basic authentication and TLS.
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This is **experimental** and might change in the future.
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Currentlu TLS is only supported for the HTTP traffic. Gossip traffic does not
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support encryption yet.
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To specify which web configuration file to load, use the `--web.config.file` flag.
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The file is written in [YAML format](https://en.wikipedia.org/wiki/YAML),
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defined by the scheme described below.
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Brackets indicate that a parameter is optional. For non-list parameters the
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value is set to the specified default.
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The file is read upon every http request, such as any change in the
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configuration and the certificates is picked up immediately.
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Generic placeholders are defined as follows:
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* `<boolean>`: a boolean that can take the values `true` or `false`
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* `<filename>`: a valid path in the current working directory
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* `<secret>`: a regular string that is a secret, such as a password
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* `<string>`: a regular string
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```
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tls_server_config:
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# Certificate and key files for server to use to authenticate to client.
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cert_file: <filename>
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key_file: <filename>
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# Server policy for client authentication. Maps to ClientAuth Policies.
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# For more detail on clientAuth options:
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# https://golang.org/pkg/crypto/tls/#ClientAuthType
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[ client_auth_type: <string> | default = "NoClientCert" ]
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# CA certificate for client certificate authentication to the server.
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[ client_ca_file: <filename> ]
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# Minimum TLS version that is acceptable.
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[ min_version: <string> | default = "TLS12" ]
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# Maximum TLS version that is acceptable.
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[ max_version: <string> | default = "TLS13" ]
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# List of supported cipher suites for TLS versions up to TLS 1.2. If empty,
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# Go default cipher suites are used. Available cipher suites are documented
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# in the go documentation:
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# https://golang.org/pkg/crypto/tls/#pkg-constants
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[ cipher_suites:
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[ - <string> ] ]
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# prefer_server_cipher_suites controls whether the server selects the
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# client's most preferred ciphersuite, or the server's most preferred
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# ciphersuite. If true then the server's preference, as expressed in
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# the order of elements in cipher_suites, is used.
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[ prefer_server_cipher_suites: <bool> | default = true ]
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# Elliptic curves that will be used in an ECDHE handshake, in preference
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# order. Available curves are documented in the go documentation:
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# https://golang.org/pkg/crypto/tls/#CurveID
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[ curve_preferences:
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[ - <string> ] ]
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http_server_config:
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# Enable HTTP/2 support. Note that HTTP/2 is only supported with TLS.
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# This can not be changed on the fly.
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[ http2: <boolean> | default = true ]
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# Usernames and hashed passwords that have full access to the web
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# server via basic authentication. If empty, no basic authentication is
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# required. Passwords are hashed with bcrypt.
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basic_auth_users:
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[ <string>: <secret> ... ]
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```
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