Merge pull request #9952 from flowlo/doc-https
doc: Improve article on HTTPS
This commit is contained in:
Sven Dowideit
commit
992beb2a96
1 changed files with 43 additions and 28 deletions
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@ -26,7 +26,7 @@ it will only connect to servers with a certificate signed by that CA.
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## Create a CA, server and client keys with OpenSSL
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> **Note:** replace all instances of `$HOST` in the following example with the
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> **Note**: replace all instances of `$HOST` in the following example with the
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> DNS name of your Docker daemon's host.
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First generate CA private and public keys:
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@ -40,26 +40,26 @@ First generate CA private and public keys:
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Verifying - Enter pass phrase for ca-key.pem:
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$ openssl req -new -x509 -days 365 -key ca-key.pem -sha256 -out ca.pem
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Enter pass phrase for ca-key.pem:
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You are about to be asked to enter information that will be incorporated
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into your certificate request.
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What you are about to enter is what is called a Distinguished Name or a DN.
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There are quite a few fields but you can leave some blank
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For some fields there will be a default value,
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If you enter '.', the field will be left blank.
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-----
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Country Name (2 letter code) [AU]:
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State or Province Name (full name) [Some-State]:Queensland
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Locality Name (eg, city) []:Brisbane
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Organization Name (eg, company) [Internet Widgits Pty Ltd]:Docker Inc
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Organizational Unit Name (eg, section) []:Boot2Docker
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Common Name (e.g. server FQDN or YOUR name) []:$HOST
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Email Address []:Sven@home.org.au
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You are about to be asked to enter information that will be incorporated
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into your certificate request.
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What you are about to enter is what is called a Distinguished Name or a DN.
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There are quite a few fields but you can leave some blank
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For some fields there will be a default value,
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If you enter '.', the field will be left blank.
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-----
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Country Name (2 letter code) [AU]:
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State or Province Name (full name) [Some-State]:Queensland
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Locality Name (eg, city) []:Brisbane
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Organization Name (eg, company) [Internet Widgits Pty Ltd]:Docker Inc
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Organizational Unit Name (eg, section) []:Boot2Docker
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Common Name (e.g. server FQDN or YOUR name) []:$HOST
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Email Address []:Sven@home.org.au
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Now that we have a CA, you can create a server key and certificate
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signing request (CSR). Make sure that "Common Name" (i.e., server FQDN or YOUR
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name) matches the hostname you will use to connect to Docker:
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> **Note:** replace all instances of `$HOST` in the following example with the
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> **Note**: replace all instances of `$HOST` in the following example with the
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> DNS name of your Docker daemon's host.
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$ openssl genrsa -out server-key.pem 2048
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@ -69,7 +69,7 @@ name) matches the hostname you will use to connect to Docker:
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e is 65537 (0x10001)
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$ openssl req -subj "/CN=$HOST" -new -key server-key.pem -out server.csr
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Next, we're going to sign the key with our CA:
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Next, we're going to sign the public key with our CA:
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$ openssl x509 -req -days 365 -in server.csr -CA ca.pem -CAkey ca-key.pem \
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-CAcreateserial -out server-cert.pem
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@ -93,7 +93,7 @@ config file:
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$ echo extendedKeyUsage = clientAuth > extfile.cnf
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Now sign the key:
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Now sign the public key:
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$ openssl x509 -req -days 365 -in client.csr -CA ca.pem -CAkey ca-key.pem \
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-CAcreateserial -out cert.pem -extfile extfile.cnf
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@ -102,6 +102,24 @@ Now sign the key:
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Getting CA Private Key
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Enter pass phrase for ca-key.pem:
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After generating `cert.pem` and `server-cert.pem` you can safely remove the
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two certificate signing requests:
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$ rm -v client.csr server.csr
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With a default `umask` of 022, your secret keys will be *world-readable* and
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writable for you and your group.
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In order to protect your keys from accidental damage, you will want to remove their
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write permissions. To make them only readable by you, change file modes as follows:
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$ chmod -v 0400 ca-key.pem key.pem server-key.pem
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Certificates can be world-readable, but you might want to remove write access to
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prevent accidental damage:
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$ chmod -v 0444 ca.pem server-cert.pem cert.pem
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Now you can make the Docker daemon only accept connections from clients
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providing a certificate trusted by our CA:
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@ -111,7 +129,7 @@ providing a certificate trusted by our CA:
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To be able to connect to Docker and validate its certificate, you now
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need to provide your client keys, certificates and trusted CA:
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> **Note:** replace all instances of `$HOST` in the following example with the
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> **Note**: replace all instances of `$HOST` in the following example with the
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> DNS name of your Docker daemon's host.
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$ docker --tlsverify --tlscacert=ca.pem --tlscert=cert.pem --tlskey=key.pem \
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@ -130,16 +148,13 @@ need to provide your client keys, certificates and trusted CA:
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## Secure by default
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If you want to secure your Docker client connections by default, you can move
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the files to the `.docker` directory in your home directory - and set the
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the files to the `.docker` directory in your home directory -- and set the
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`DOCKER_HOST` and `DOCKER_TLS_VERIFY` variables as well (instead of passing
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`-H=tcp://:2376` and `--tlsverify` on every call).
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$ mkdir -p ~/.docker
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$ cp ca.pem ~/.docker/ca.pem
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$ cp cert.pem ~/.docker/cert.pem
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$ cp key.pem ~/.docker/key.pem
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$ export DOCKER_HOST=tcp://:2376
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$ export DOCKER_TLS_VERIFY=1
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$ mkdir -pv ~/.docker
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$ cp -v {ca,cert,key}.pem ~/.docker
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$ export DOCKER_HOST=tcp://:2376 DOCKER_TLS_VERIFY=1
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Docker will now connect securely by default:
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@ -165,11 +180,11 @@ Docker in various other modes by mixing the flags.
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certificate and authenticate server based on given CA
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If found, the client will send its client certificate, so you just need
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to drop your keys into `~/.docker/<ca, cert or key>.pem`. Alternatively,
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to drop your keys into `~/.docker/{ca,cert,key}.pem`. Alternatively,
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if you want to store your keys in another location, you can specify that
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location using the environment variable `DOCKER_CERT_PATH`.
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$ export DOCKER_CERT_PATH=${HOME}/.docker/zone1/
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$ export DOCKER_CERT_PATH=~/.docker/zone1/
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$ docker --tlsverify ps
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### Connecting to the Secure Docker port using `curl`
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