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@ -15,31 +15,41 @@
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`iot` 通过 TLS 长连接向 `efka` 下发容器命令：
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```erlang
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{command, Ref, {container, CommandMap}}
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{<<"command">>, Ref, {<<"container">>, CommandMap}}
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```
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`efka` 执行后回复：
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```erlang
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{command_response, Ref, {container, Reply}}
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{<<"command_response">>, Ref, {<<"container">>, Reply}}
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```
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`Reply` 取值：
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```erlang
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ok
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{ok, Result}
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{error, Reason}
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<<"ok">>
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{<<"ok">>, Result}
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{<<"error">>, Reason}
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```
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只有 `efka_client` 处于 `activated` 状态时，容器命令才会正常执行；处于 `restricted` 或其他状态时会返回错误。
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`Ref` 是 `crypto:strong_rand_bytes(16)` 生成的 16 字节 binary。网络帧只使用 `binary_to_term(PacketBin, [safe])` 可解码的 safe term；协议 label、业务 label、map key 和 action 都使用 binary。
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只有 `efka_client` 处于 `activated` 状态时，容器命令才会正常执行；处于非 activated 状态时会返回错误。
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## 2. 容器命令 map
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`efka_client` 收到网络协议里的 binary-key `CommandMap` 后，直接按 binary key 和 binary action 做函数参数匹配，不再做整包 atom-key 转换。
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- command 顶层、`target`、deploy `params`、`create` 中间结构都使用 binary key。
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- `<<"action">>` 的取值使用 binary：`<<"list">>`、`<<"deploy">>`、`<<"start">>`、`<<"stop">>`、`<<"kill">>`、`<<"remove">>`、`<<"config">>`。
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- `<<"__undefined__">>` 只在 Docker 参数构造读取可选字段时按需当成 `undefined` 处理。
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下面各小节描述的是 `efka` 直接接收和处理的 map 格式。
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### list
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```erlang
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#{action => list}
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#{<<"action">> => <<"list">>}
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```
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执行：
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@ -58,9 +68,9 @@ GET /containers/json?all=true
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```erlang
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#{
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action => deploy,
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task_id => TaskId,
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params => Params
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<<"action">> => <<"deploy">>,
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<<"task_id">> => TaskId,
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<<"params">> => Params
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}
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```
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@ -76,8 +86,8 @@ docker_deploy_manager:deploy(TaskId, Params)
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```erlang
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#{
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action => start,
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target => Target
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<<"action">> => <<"start">>,
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<<"target">> => Target
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}
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```
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@ -97,9 +107,9 @@ POST /containers/{name_or_id}/start
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```erlang
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#{
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action => stop,
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target => Target,
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timeout_seconds => TimeoutSeconds
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<<"action">> => <<"stop">>,
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<<"target">> => Target,
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<<"timeout_seconds">> => TimeoutSeconds
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}
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```
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@ -119,9 +129,9 @@ POST /containers/{name_or_id}/stop?t={TimeoutSeconds}
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```erlang
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#{
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action => kill,
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target => Target,
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signal => Signal
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<<"action">> => <<"kill">>,
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<<"target">> => Target,
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<<"signal">> => Signal
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}
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```
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@ -135,10 +145,10 @@ docker_commands:kill_container(ContainerNameOrId, Signal)
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```erlang
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#{
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action => remove,
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target => Target,
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force => Force,
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remove_volumes => RemoveVolumes
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<<"action">> => <<"remove">>,
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<<"target">> => Target,
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<<"force">> => Force,
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<<"remove_volumes">> => RemoveVolumes
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}
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```
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@ -152,9 +162,9 @@ docker_commands:remove_container(ContainerNameOrId, Force, RemoveVolumes)
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```erlang
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#{
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action => config,
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target => Target,
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config => Config
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<<"action">> => <<"config">>,
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<<"target">> => Target,
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<<"config">> => Config
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}
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```
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@ -172,8 +182,8 @@ docker_helper:update_container_config(ContainerNameOrId, iolist_to_binary(Config
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```erlang
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#{
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name => ContainerName,
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id => ContainerId
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<<"name">> => ContainerName,
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<<"id">> => ContainerId
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}
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```
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@ -189,8 +199,8 @@ docker_helper:update_container_config(ContainerNameOrId, iolist_to_binary(Config
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```erlang
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#{
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container_name => ContainerName,
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create => Create
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<<"container_name">> => ContainerName,
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<<"create">> => Create
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}
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```
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@ -215,9 +225,9 @@ efka.root_dir/container_name/
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```erlang
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#{
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config => ContainerConfig,
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host_config => HostConfig,
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networking_config => NetworkingConfig
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<<"config">> => ContainerConfig,
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<<"host_config">> => HostConfig,
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<<"networking_config">> => NetworkingConfig
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}
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```
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@ -340,8 +350,8 @@ Body = iolist_to_binary(json:encode(Options))
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```erlang
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[
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#{container_port => 80, protocol => <<"tcp">>},
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#{container_port => 53, protocol => <<"udp">>}
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#{<<"container_port">> => 80, <<"protocol">> => <<"tcp">>},
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#{<<"container_port">> => 53, <<"protocol">> => <<"udp">>}
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]
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```
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@ -369,10 +379,10 @@ Body = iolist_to_binary(json:encode(Options))
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```erlang
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#{
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test => [<<"CMD-SHELL">>, <<"curl -f http://localhost || exit 1">>],
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interval_ns => 30000000000,
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timeout_ns => 10000000000,
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retries => 3
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<<"test">> => [<<"CMD-SHELL">>, <<"curl -f http://localhost || exit 1">>],
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<<"interval_ns">> => 30000000000,
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<<"timeout_ns">> => 10000000000,
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<<"retries">> => 3
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}
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```
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@ -440,7 +450,7 @@ efka 自动补丁后输出：
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输入：
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```erlang
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#{name => <<"always">>, maximum_retry_count => 0}
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#{<<"name">> => <<"always">>, <<"maximum_retry_count">> => 0}
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```
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输出：
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@ -458,7 +468,7 @@ efka 自动补丁后输出：
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输入：
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```erlang
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#{name => <<"on-failure">>, maximum_retry_count => 3}
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#{<<"name">> => <<"on-failure">>, <<"maximum_retry_count">> => 3}
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```
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输出：
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@ -481,9 +491,9 @@ efka 自动补丁后输出：
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```erlang
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[
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#{
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path_on_host => <<"/dev/ttyUSB0">>,
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path_in_container => <<"/dev/ttyUSB0">>,
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cgroup_permissions => <<"rwm">>
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<<"path_on_host">> => <<"/dev/ttyUSB0">>,
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<<"path_in_container">> => <<"/dev/ttyUSB0">>,
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<<"cgroup_permissions">> => <<"rwm">>
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}
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]
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```
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@ -512,10 +522,10 @@ efka 自动补丁后输出：
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```erlang
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#{
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memory => 536870912,
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memory_reservation => 268435456,
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nano_cpus => 1500000000,
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cpu_shares => 512
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<<"memory">> => 536870912,
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<<"memory_reservation">> => 268435456,
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<<"nano_cpus">> => 1500000000,
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<<"cpu_shares">> => 512
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}
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```
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@ -540,7 +550,7 @@ efka 自动补丁后输出：
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```erlang
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[
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#{name => <<"nofile">>, soft => 1024, hard => 2048}
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#{<<"name">> => <<"nofile">>, <<"soft">> => 1024, <<"hard">> => 2048}
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]
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```
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@ -628,9 +638,9 @@ efka 自动补丁后输出：
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```erlang
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#{
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endpoints => [
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#{name => <<"bridge">>},
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#{name => <<"mynet">>}
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<<"endpoints">> => [
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#{<<"name">> => <<"bridge">>},
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#{<<"name">> => <<"mynet">>}
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]
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}
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```
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@ -661,26 +671,26 @@ efka 自动补丁后输出：
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收到的 deploy command：
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```erlang
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{command, Ref, {container, #{
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action => deploy,
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task_id => 1001,
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params => #{
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container_name => <<"my_nginx">>,
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create => #{
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config => #{
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image => <<"docker.io/library/nginx:latest">>,
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cmd => [<<"nginx">>, <<"-g">>, <<"daemon off;">>],
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env => [<<"ENV=prod">>],
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volumes => [<<"/data">>],
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exposed_ports => [#{container_port => 80, protocol => <<"tcp">>}]
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{<<"command">>, Ref, {<<"container">>, #{
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<<"action">> => <<"deploy">>,
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<<"task_id">> => 1001,
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<<"params">> => #{
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<<"container_name">> => <<"my_nginx">>,
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<<"create">> => #{
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<<"config">> => #{
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<<"image">> => <<"docker.io/library/nginx:latest">>,
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<<"cmd">> => [<<"nginx">>, <<"-g">>, <<"daemon off;">>],
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<<"env">> => [<<"ENV=prod">>],
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<<"volumes">> => [<<"/data">>],
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<<"exposed_ports">> => [#{<<"container_port">> => 80, <<"protocol">> => <<"tcp">>}]
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},
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host_config => #{
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binds => [<<"/host/data:/data">>],
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restart_policy => #{name => <<"always">>, maximum_retry_count => 0},
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memory => 536870912
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<<"host_config">> => #{
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<<"binds">> => [<<"/host/data:/data">>],
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<<"restart_policy">> => #{<<"name">> => <<"always">>, <<"maximum_retry_count">> => 0},
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<<"memory">> => 536870912
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},
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networking_config => #{
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endpoints => [#{name => <<"bridge">>}]
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<<"networking_config">> => #{
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<<"endpoints">> => [#{<<"name">> => <<"bridge">>}]
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}
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}
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}
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@ -2,95 +2,99 @@
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本文档描述 `efka` 与 `iot` 之间的 TLS 长连接协议。当前协议由 Erlang term 直接序列化，发送端使用 `term_to_binary/1`，接收端使用 `binary_to_term(PacketBin, [safe])`。
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协议帧只使用 safe external term：顶层 label、业务 label、map key 使用 binary；`Ref` 使用 `crypto:strong_rand_bytes(16)` 生成，是 16 字节 binary。网络协议里不发送 Erlang `reference()`，也不依赖动态创建 atom。
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## 传输层
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- `efka` 作为 TLS client 连接 `iot`。
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- `iot` 作为 TLS server 接收多个 `efka` 连接，一个连接对应一个 `ssl_channel` 进程。
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- socket 使用 `{packet, 4}`，每个 Erlang term binary 作为一个完整包发送。
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- `Ref` 使用 `make_ref()` 生成，只在当前连接的 inflight 表内匹配。
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- `Ref` 使用 `crypto:strong_rand_bytes(16)` 生成，只在当前连接的 inflight 表内匹配。
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## 顶层帧
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协议顶层 tuple 用来表达交互语义：
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```erlang
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{request, Ref, Body}
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{response, Ref, Reply}
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{command, Ref, {Domain, Payload}}
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{command_response, Ref, {Domain, Reply}}
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{message, Body}
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{<<"request">>, Ref, Body}
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{<<"response">>, Ref, Reply}
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{<<"command">>, Ref, {Domain, Payload}}
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{<<"command_response">>, Ref, {Domain, Reply}}
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{<<"message">>, Body}
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```
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语义说明：
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| 帧 | 方向 | 语义 |
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| --- | --- | --- |
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| `{request, Ref, Body}` | efka -> iot | efka 发起请求，需要 iot 回复 |
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| `{response, Ref, Reply}` | iot -> efka | iot 对 efka request 的回复 |
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| `{command, Ref, {Domain, Payload}}` | iot -> efka | iot 下发命令，需要 efka 回复 |
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| `{command_response, Ref, {Domain, Reply}}` | efka -> iot | efka 对 iot command 的回复 |
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| `{message, Body}` | 双向 | 异步消息，不要求回复 |
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| `{<<"request">>, Ref, Body}` | efka -> iot | efka 发起请求，需要 iot 回复 |
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| `{<<"response">>, Ref, Reply}` | iot -> efka | iot 对 efka request 的回复 |
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| `{<<"command">>, Ref, {Domain, Payload}}` | iot -> efka | iot 下发命令，需要 efka 回复 |
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| `{<<"command_response">>, Ref, {Domain, Reply}}` | efka -> iot | efka 对 iot command 的回复 |
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| `{<<"message">>, Body}` | 双向 | 异步消息，不要求回复 |
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`command` 和 `command_response` 的 `Domain` 表示业务域，目前支持：
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- `container`
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- `<<"container">>`
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## 鉴权请求
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初始连接由 `efka` 发起鉴权 request。每条 TLS 连接只允许一次鉴权；`iot` 侧鉴权成功后会在 `ssl_channel` 标记该连接已鉴权，如果同一连接再次发送 `auth_request`，`iot` 会直接关闭连接。
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```erlang
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{request, Ref, {auth_request, #{
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uuid => UUID,
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token => Token,
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timestamp => Timestamp
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{<<"request">>, Ref, {<<"auth_request">>, #{
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<<"uuid">> => UUID,
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<<"token">> => Token,
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<<"timestamp">> => Timestamp
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}}}
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```
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`iot` 回复：
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```erlang
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{response, Ref, {auth_response, ok}}
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{response, Ref, {auth_response, {error, {failed, Reason}}}}
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{<<"response">>, Ref, {<<"auth_response">>, <<"ok">>}}
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{<<"response">>, Ref, {<<"auth_response">>, {<<"error">>, {<<"failed">>, Reason}}}}
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```
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处理语义：
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- `ok`：`efka` 进入 `activated` 状态。
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- `{error, {failed, Reason}}`：鉴权失败，`iot` 返回失败响应后关闭连接；`efka` 进入重连流程。
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- `<<"ok">>`：`efka` 进入 `activated` 状态。
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- `{<<"error">>, {<<"failed">>, Reason}}`：鉴权失败，`iot` 返回失败响应后关闭连接；`efka` 进入重连流程。
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## 授权控制
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`/host/activate` 只修改 `iot` 本地和持久化的 host 授权状态，不再向 `efka` 下发 auth command。`efka` 可以继续保持连接并发送数据，是否处理这些数据由 `iot_host` 当前状态决定。
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因此当前协议没有 `{command, Ref, {auth, ...}}` 和 `{command_response, Ref, {auth, ...}}`。授权关闭时，`iot_host` 保持 channel 在线，但不处理上报数据；授权重新打开后，已在线的 channel 可以继续使用。
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因此当前协议没有 `{<<"command">>, Ref, {<<"auth">>, ...}}` 和 `{<<"command_response">>, Ref, {<<"auth">>, ...}}`。授权关闭时，`iot_host` 保持 channel 在线，但不处理上报数据；授权重新打开后，已在线的 channel 可以继续使用。
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## 容器管理命令
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`iot` 对 `efka` 的容器管理使用 command 语义：
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```erlang
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{command, Ref, {container, CommandMap}}
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{<<"command">>, Ref, {<<"container">>, CommandMap}}
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```
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`efka` 回复：
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```erlang
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{command_response, Ref, {container, Reply}}
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{<<"command_response">>, Ref, {<<"container">>, Reply}}
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```
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`Reply` 取值：
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```erlang
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ok
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{ok, Result}
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{error, Reason}
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<<"ok">>
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{<<"ok">>, Result}
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{<<"error">>, Reason}
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```
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`CommandMap` 使用 binary key 和 binary action；`efka` 接收后直接按 binary key/action 匹配，Docker 参数链路继续使用 binary-key map，不再转换成 atom-key map。
|
||||
|
||||
### list
|
||||
|
||||
```erlang
|
||||
#{action => list}
|
||||
#{<<"action">> => <<"list">>}
|
||||
```
|
||||
|
||||
返回当前 `efka` 主机上的容器列表。
|
||||
@ -99,9 +103,9 @@ ok
|
||||
|
||||
```erlang
|
||||
#{
|
||||
action => deploy,
|
||||
task_id => TaskId,
|
||||
params => Params
|
||||
<<"action">> => <<"deploy">>,
|
||||
<<"task_id">> => TaskId,
|
||||
<<"params">> => Params
|
||||
}
|
||||
```
|
||||
|
||||
@ -111,8 +115,8 @@ ok
|
||||
|
||||
```erlang
|
||||
#{
|
||||
action => start,
|
||||
target => Target
|
||||
<<"action">> => <<"start">>,
|
||||
<<"target">> => Target
|
||||
}
|
||||
```
|
||||
|
||||
@ -120,9 +124,9 @@ ok
|
||||
|
||||
```erlang
|
||||
#{
|
||||
action => stop,
|
||||
target => Target,
|
||||
timeout_seconds => TimeoutSeconds
|
||||
<<"action">> => <<"stop">>,
|
||||
<<"target">> => Target,
|
||||
<<"timeout_seconds">> => TimeoutSeconds
|
||||
}
|
||||
```
|
||||
|
||||
@ -130,9 +134,9 @@ ok
|
||||
|
||||
```erlang
|
||||
#{
|
||||
action => kill,
|
||||
target => Target,
|
||||
signal => Signal
|
||||
<<"action">> => <<"kill">>,
|
||||
<<"target">> => Target,
|
||||
<<"signal">> => Signal
|
||||
}
|
||||
```
|
||||
|
||||
@ -140,10 +144,10 @@ ok
|
||||
|
||||
```erlang
|
||||
#{
|
||||
action => remove,
|
||||
target => Target,
|
||||
force => Force,
|
||||
remove_volumes => RemoveVolumes
|
||||
<<"action">> => <<"remove">>,
|
||||
<<"target">> => Target,
|
||||
<<"force">> => Force,
|
||||
<<"remove_volumes">> => RemoveVolumes
|
||||
}
|
||||
```
|
||||
|
||||
@ -151,9 +155,9 @@ ok
|
||||
|
||||
```erlang
|
||||
#{
|
||||
action => config,
|
||||
target => Target,
|
||||
config => Config
|
||||
<<"action">> => <<"config">>,
|
||||
<<"target">> => Target,
|
||||
<<"config">> => Config
|
||||
}
|
||||
```
|
||||
|
||||
@ -165,8 +169,8 @@ ok
|
||||
|
||||
```erlang
|
||||
#{
|
||||
name => ContainerName,
|
||||
id => ContainerId
|
||||
<<"name">> => ContainerName,
|
||||
<<"id">> => ContainerId
|
||||
}
|
||||
```
|
||||
|
||||
@ -179,9 +183,9 @@ ok
|
||||
### efka -> iot: data
|
||||
|
||||
```erlang
|
||||
{message, {data, #{
|
||||
route_key => RouteKey,
|
||||
metric => Metric
|
||||
{<<"message">>, {<<"data">>, #{
|
||||
<<"route_key">> => RouteKey,
|
||||
<<"metric">> => Metric
|
||||
}}}
|
||||
```
|
||||
|
||||
@ -190,20 +194,20 @@ ok
|
||||
### efka -> iot: task_event
|
||||
|
||||
```erlang
|
||||
{message, {task_event, #{
|
||||
task_id => TaskId,
|
||||
type => Type,
|
||||
stream => Stream
|
||||
{<<"message">>, {<<"task_event">>, #{
|
||||
<<"task_id">> => TaskId,
|
||||
<<"type">> => Type,
|
||||
<<"stream">> => Stream
|
||||
}}}
|
||||
```
|
||||
|
||||
任务事件流关闭时：
|
||||
|
||||
```erlang
|
||||
{message, {task_event, #{
|
||||
task_id => TaskId,
|
||||
type => <<"close">>,
|
||||
stream => Reason
|
||||
{<<"message">>, {<<"task_event">>, #{
|
||||
<<"task_id">> => TaskId,
|
||||
<<"type">> => <<"close">>,
|
||||
<<"stream">> => Reason
|
||||
}}}
|
||||
```
|
||||
|
||||
@ -218,10 +222,10 @@ GET /event_stream?uuid=<host_uuid>&task_id=<task_id>
|
||||
### iot -> efka: pub
|
||||
|
||||
```erlang
|
||||
{message, {pub, #{
|
||||
topic => Topic,
|
||||
qos => Qos,
|
||||
content => Content
|
||||
{<<"message">>, {<<"pub">>, #{
|
||||
<<"topic">> => Topic,
|
||||
<<"qos">> => Qos,
|
||||
<<"content">> => Content
|
||||
}}}
|
||||
```
|
||||
|
||||
@ -248,5 +252,6 @@ GET /event_stream?uuid=<host_uuid>&task_id=<task_id>
|
||||
- 旧容器回复：`{response, Ref, {container_response, ...}}`
|
||||
- 旧授权控制：`{message, {auth_control, Command}}`
|
||||
- 已移除的 auth command：`{command, Ref, {auth, activate | deactivate}}`
|
||||
- 旧 Ref：Erlang `reference()`，例如 `make_ref()` 生成的值。
|
||||
|
||||
如果需要滚动升级，应先增加临时兼容分支或引入协议版本协商。
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user