Compose
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Compose（組成）
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Engine
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Engine: Security
AppArmor security profiles for Docker (Engine)
Automation with content trust (Engine)
Content trust in Docker (Engine)
Delegations for content trust (Engine)
Deploying Notary (Engine)
Docker security (Engine)
Docker security non-events (Engine)
Isolate containers with a user namespace (Engine)
Manage keys for content trust (Engine)
Play in a content trust sandbox (Engine)
Protect the Docker daemon socket (Engine)
Seccomp security profiles for Docker (Engine)
Secure Engine
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Using certificates for repository client verification (Engine)
Engine: Tutorials
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Get Started
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Part 2: Containers
Part 3: Services
Part 4: Swarms
Part 5: Stacks
Part 6: Deploy your app
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Notary
Client configuration (Notary)
Common Server and signer configurations (Notary)
Getting started with Notary
Notary changelog
Notary configuration files
Running a Notary service
Server configuration (Notary)
Signer configuration (Notary)
Understand the service architecture (Notary)
Use the Notary client
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Docker內置的群集模式公鑰基礎設施（PKI）系統(tǒng)使得安全部署容器編排系統(tǒng)變得非常簡單。群中的節(jié)點使用相互傳輸層安全性（TLS）來驗證，授權和加密與群中其他節(jié)點的通信。
當您通過運行創(chuàng)建swarm時docker swarm init，Docker將自己指定為管理器節(jié)點。默認情況下，管理器節(jié)點會生成一個新的根證書頒發(fā)機構（CA）和一個密鑰對，用于保護與加入該群體的其他節(jié)點的通信。如果您愿意，可以使用--external-cadocker swarm init命令的標志來指定您自己的外部生成的根CA.
當您將其他節(jié)點加入到群集中時，管理器節(jié)點還會生成兩個令牌：一個工作人員令牌和一個管理員令牌。每個令牌都包含根 CA 證書的摘要和隨機生成的秘密。當節(jié)點加入群集時，加入節(jié)點使用摘要來驗證來自遠程管理器的根 CA 證書。遠程管理員使用該秘密來確保加入節(jié)點是批準的節(jié)點。
每當新節(jié)點加入群時，管理員都會向節(jié)點發(fā)出證書。證書包含一個隨機生成的節(jié)點 ID，用于標識證書公用名稱（CN）下的節(jié)點和組織單位（OU）下的角色。節(jié)點ID用作當前群中節(jié)點生存期的密碼安全節(jié)點標識。
下圖說明了工作管理器節(jié)點和工作節(jié)點如何使用最少的 TLS 1.2來加密通信。
下面的示例顯示了來自工作節(jié)點的證書的信息：
Certificate: Data: Version: 3 (0x2) Serial Number: 3b:1c:06:91:73:fb:16:ff:69:c3:f7:a2:fe:96:c1:73:e2:80:97:3b Signature Algorithm: ecdsa-with-SHA256 Issuer: CN=swarm-ca Validity Not Before: Aug 30 02:39:00 2016 GMT Not After : Nov 28 03:39:00 2016 GMT Subject: O=ec2adilxf4ngv7ev8fwsi61i7, OU=swarm-worker, CN=dw02poa4vqvzxi5c10gm4pq2g...snip...
默認情況下，群中的每個節(jié)點每三個月更新一次證書。您可以通過運行該docker swarm update --cert-expiry <TIME PERIOD>命令來配置此間隔。最小旋轉值是1小時。有關詳細信息，請參閱 Docker 群更新 CLI 參考。
輪換CA證書
如果群集 CA 密鑰或管理器節(jié)點受到危害，您可以輪換群集根CA，以便任何節(jié)點都不會再信任由舊的根 CA 簽署的證書。
運行docker swarm ca --rotate以生成新的CA證書和密鑰。如果你愿意，你可以傳遞--ca-cert和--external-ca標志來指定根證書，并使用群集外部的根 CA. 或者，您可以通過--ca-cert和--ca-key標志來指定您希望群使用的確切證書和密鑰。
當你發(fā)出這個docker swarm ca --rotate命令時，下面的事情按順序發(fā)生：
Docker 生成一個交叉簽名證書。這意味著新的根 CA 證書的版本是使用舊的根 CA 證書簽署的。此交叉簽名證書用作所有新節(jié)點證書的中間證書。這可確保仍信任舊根 CA 的節(jié)點將能夠驗證由新 CA 簽名的證書。
在Docker 17.06 及更高版本中，Docker 還告訴所有節(jié)點立即更新其 TLS 證書。此過程可能需要幾分鐘時間，具體取決于群中節(jié)點的數量。
注意：如果您的 swarm 具有不同 Docker 版本的節(jié)點，則以下兩種情況屬實：
- Only a manager that is running as the leader **and** running Docker 17.06 or higher will tell nodes to renew their TLS certificates.- Only nodes running Docker 17.06 or higher will obey this directive.
對于最可預測的行為，確保所有 swarm 節(jié)點都在運行 Docker 17.06 或更高版本。
在群中的每個節(jié)點都有新的 CA 簽名的新 TLS 證書后，Docker 將忘記舊的 CA 證書和密鑰材料，并告訴所有節(jié)點只信任新的 CA 證書。這也會導致群體的聯(lián)合令牌發(fā)生變化。以前的聯(lián)合令牌將不再有效。從這一點開始，所有已頒發(fā)的新節(jié)點證書都將使用新的根 CA 進行簽名，并且不會包含任何中間件。了解更多
閱讀有關節(jié)點如何工作。
了解群集模式服務如何工作。