ecs execute command が失敗した際に調査したこと

An error occurred (InvalidParameterException) when calling the ExecuteCommand operation: The execute command failed because execute command was not enabled when the task was run or the execute command agent isn't running. Wait and try again or run a new task with execute command enabled and try again.

$ aws ecs describe-services --cluster example-cluster --services example-service | jq '.services[].enableExecuteCommand'

true

$ aws ecs describe-tasks --cluster example-cluster --tasks 61cf31d333cd43508a412e1437814e19 | jq '.tasks[].enableExecuteCommand'

true

statement {
  actions = [
    "ssmmessages:CreateControlChannel",
    "ssmmessages:CreateDataChannel",
    "ssmmessages:OpenControlChannel",
    "ssmmessages:OpenDataChannel",
  ]
  resources = ["*"]
}

$ aws ecs execute-command \
    --cluster example-cluster \
    --task 61cf31d333cd43508a412e1437814e19 \
    --container other_container \
    --interactive \
    --command "ps aux"

他コンテナだと ecs execute-command を実行できた

$ aws ecs execute-command \
    --cluster example-cluster \
    --task 61cf31d333cd43508a412e1437814e19 \
    --container rails \
    --interactive \
    --command "ps aux"

An error occurred (InvalidParameterException) when calling the ExecuteCommand operation: The execute command failed because execute command was not enabled when the task was run or the execute command agent isn't running. Wait and try again or run a new task with execute command enabled and try again.