See AWS docs . Assuming you have already created an ECS cluster in your VPC (you can use default cluster and VPC created by AWS), and have an API key for your Prefect agent, let's create a task definition for ECS Prefect agent using AWS CLI. To register the task definition: $ aws ecs register-task-definition --cli-input-json file://task-definition. Sep 29, 2020 · I am trying to deploy ECS task definition with Terraform. Step 1 - Create workflow. json file: aws ecs register-task-definition —cli-input-json file://example-task-def. # CHANGE SERVICE aws ecs update-service -service projectname -task-definition projectname -cluster projectname -force-new-deployment -desired-count 1 -health-check-grace-period-seconds 300. Seems, there are two actions that we can do to improve . To deploy to your ECS cluster: In your GitLab project, go to Settings > CI/CD. The task definition is also available on GitHub: task-definition. It specifies the same sorts of configuration options you'd set in a Dockerfile or a docker run command, including which Docker images you'll use for the containers, the extent to which each container will use system resources, and which command a container will run on startup. json codedeploy-application: my-codedeploy-application codedeploy-deployment-group: my-codedeploy-deployment-group. json file for reference. For instance, if you have two tasks running on a t2. The task definition is a text file, in JSON format, that describes one or more containers, up to a maximum of ten, that form your application. Once the task definition gets registered we can update the service to use that particular revision of the task definition. I did not show a Task Definition in the diagram because a Task is simply an "instance" of Task Definition. You specify parameters for the job in YAML format. family - (Required) A unique name for your task definition. ECS Local uses the Docker Compose installed on the local machine to create network for containers and provision those containers. Task: A running docker container based on a task definition. The ECS Task is the action that takes our image and deploys it to a container. Create a pipeline to update the services running on the ECS cluster. Not all parameters are valid for a specific case. For example <project-root>/ci/aws/task-definition. security baseline configuration checklist Note that this action returns the value task-definition as explained in the action. This variable needs to be used within a aws_ecs_task_definition resource in the container_definitions. User should be able to create a new ECS task definition based on a local JSON file. ECS Deploy - task-definitions. First thing to do, is to create a repository by clicking the Create repository button. To deploy to your ECS cluster: In your GitLab project, go to Settings > CI/CD. com On my local I use this docker run command and I'm able to pass in my env variables, but through task definition the variables are not being passed to container. docker_address, var. WARNING: CI_AWS_ECS_TASK_DEFINITION_FILE takes precedence over CI_AWS_ECS_TASK_DEFINITION if both these variables are defined within your project. ECS Local uses the Docker Compose installed on the local machine to create network for containers and provision those containers. github/workflows folder. AWS : CLI (Command Line Interface) AWS : CLI (ECS with ALB & autoscaling) AWS : ECS with cloudformation and json task definition. mod file and a go. new file: terraform/ecs. We will place an example JSON in the location of the ECS. github/workflows folder. See AWS ECS YAML parameters and AWS ECS YAML config example; Buddy's AWS ECS API is supported; The action supports conditional execution it can be run on each execution, only if there are changes in the repository or specific paths since last execution or if an. Intercepted traffic to and from EFS may lead to data loss. See AWS ECS YAML parameters and AWS ECS YAML config example; Buddy's AWS ECS API is supported; The action supports conditional execution it can be run on each execution, only if there are changes in the repository or specific paths since last execution or if an. I googled but couldn't help. Store your Amazon ECS task definition as a JSON file in your GitHub repository. To prepare your application to run on Amazon ECS, you create a task definition. In the file put a value of container definitions. 8 - ECS Troubleshooting. How to use ECS service discovery with CloudFormation. Set the following CI/CD variables. json codedeploy-application: my-codedeploy-application codedeploy-deployment-group: my-codedeploy-deployment-group. Make sure to customize the examples, such as using your account ID. 3, ECS Task Definition from local JSON allows you to have the ECS Task Definition . ecs_task_execution_role: ECS task execution permission, for example, if ECS needs to pull images from ECR, it needs to have the permission to access ECR. I'm looking for a way to override above environment variables using AWS ECS CLI. Create the Copilot application. Services: This component specifies how many tasks should be running across a given cluster. This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. volume list subresource. This post describes 3 methods to pass secrets as environment variables to applications running as AWS ECS Tasks. For Capacity provider strategy, leave it to default value Cluster default Strategy. security baseline configuration checklist Note that this action returns the value task-definition as explained in the action. See action. Use task and service definitions to deploy containers to the cluster. There is a Task role in the ECS task definition that can specify a set of Amazon ECS task IAM role, this IAM role needs to include the following permissions, or it can be defined as an IAM policy and referenced to multiple IAM roles. Each instance is based on the ECS-Optimized Amazon Linux AMI , which has the ECS Container Agent installed that knows how to talk to the ECS Cluster. Create a new workflow for continuous deployment in the. For example, this AWS-provided sample task definition, stores the password of a MySQL database in an environment variable. Cost example: a 0. json Go to file Go to file T. Select Elastic Container Service Task as use case and continue by clicking Next: Permissions. I decided to use a template for my task definition, here is an example of the template I used. Some of the parameters you can specify in a task definition include: Which Docker images to use with the containers in your task. resource "aws_ecs_task_definition" "service" { family = "service" container_definitions = "$ {file ("task-definitions/service. ECS Deployments Overview. Each instance also has a script on it from the ecs-scripts module that knows how to configure the instance. Log In My Account bx. Create a pipeline to update the services running on the ECS cluster. This variable needs to be used within a aws_ecs_task_definition resource in the container_definitions. With our image ready for deployment, we can go ahead and add ECR to Octopus as a first-class feed type. ['RequestType'] == 'Create' or event['RequestType'] == 'Update': try: data = ecs. To install it, use: ansible-galaxy collection install community. AWS : CLI (Command Line Interface) AWS : CLI (ECS with ALB & autoscaling) AWS : ECS with cloudformation and json task definition. $ aws ecs register-task-definition --cli-input-json file://task-definition. AWS ECS allows you to run and manage Docker containers on clusters of AWS EC2 instances. json codedeploy-application: my-codedeploy-application codedeploy-deployment-group: my-codedeploy-deployment-group. 5 AWS ECS-CONTAINER-DEFINITION Description Terraform module to generate well-formed JSON documents (container definitions) that are passed to the aws_ecs_task_definition Terraform resource Specification Properties writeConnectionSecretToRef Last updated on Sep 22, 2022 by yangxg. Upon deployment both the Lambda functions and Fargate tasks are provisioned within a single CloudFormation stack, with task ARN's being returned as outputs for extended use elsewhere. json: "family" : "ecs-cvs-behaviour-staging" ,. For example <project-root>/ci/aws/task-definition. . It allows the application to run in the cloud without. Example 1: To register a task definition with a JSON file. The following register-task-definition example registers a task definition to the specified family. See also: AWS API Documentation list-task-definitions is a paginated operation. Some of the parameters you can specify in a task definition include:. This variable needs to be used within a aws_ecs_task_definition resource in the container_definitions. client ("ecs", region_name ="us-east-1") response = client. The deployment stage of your CD pipeline uses this information to create a new revision of your service's task definition, and then it updates the service to use the new task definition. The following update-task-set example updates a task set to adjust the scale. 24 lines (24 sloc) 503 Bytes. For a Compose file to declare a volume, ECS integration will define creation of an EFS file system within the CloudFormation template, with Retain policy so data won't be deleted on application shut-down. resource "aws_ecs_task_definition" "scheduler-definition" { family = "scheduler-test" container_definitions = jsonencode( [ { "name" = "scheduler", "image" = format("%s/%s", var. json file. What is Task Definition in ECS? A task definition is required to run Docker containers in Amazon ECS. net: the Transformers Wiki is the unofficial moase funeral home death notices knowledge database of wrinkles the clown phone number 2021 articles that anyone can edit or add to!The task definition defines what image to deploy, the resource constraints per task and the role under which to execute the task. ['RequestType'] == 'Create' or event['RequestType'] == 'Update': try: data = ecs. The Amazon OpenSearch Service. I did not show a Task Definition in the diagram because a Task is simply an "instance" of Task Definition. aws ecs register- task - definition --cli-input-json file://fargate- task. Task definitions specify various parameters for your application. In the configuration above, we create an ECS Task Definition with 1/4th of a CPU and 512MB of RAM, the smallest possible specifications. Method 1 — Pass secrets as environment variables in the ECS. If the requires_compatibilities is FARGATE this field is required. GitHub removes special characters, and uses the name __run when the current step runs a script without an id. From the Library section, add a new feed and select the type AWS Elastic Container Registry. boto; boto3; botocore; json; python >= 2. medium, each with 1,024 budgeted CPU units, each task could individually burst up to 2,048 given that the other task was completely idle. and memory or memory reservation in either task or container definition. If using the Fargate launch type, this field is required and is limited by the cpu. Here's an example of how to do it on Docker Hub: Create a public repository called sun-api on Docker Hub. traxxas website how to find lost toyota smart key printable credit card convenience fee sign helluva boss 3d models product image slider for shopify dawn theme open. json Find file Blame History Permalink create log group; be more explicity and reduce resource usage · 1168c82a Mike Hoskins authored Apr 08, 2020. Copy the JSON output of the task definition and store it in a private repository for recoverability. WARNING: CI_AWS_ECS_TASK_DEFINITION_FILE takes precedence over CI_AWS_ECS_TASK_DEFINITION if both these variables are defined within your project. . github/workflows folder. Configure your AWS CLI credentials file and set the correct profile, otherwise the default profile is used: export AWS_DEFAULT_PROFILE=kammin. Task: A running docker container based on a task definition. The container definitions are saved in JSON format at the specified file location. json file. This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. This is similar to a name for multiple versions of the task definition, specified with a. To update service with new container, you need to: upload new container to repository; trigger task definition update; trigger container update; important: make sure service rules allow launching new version of the task. Using the Framework definition validation (backed by JSON Schema) I was able to validate complex configuration which has been supplied with ease. The task definition is a text file, in JSON format, that describes one or more containers, up to a maximum of ten, that form your application. Registers an Amazon >ECS</b. In order to launch the ECS task follow these steps: We position ourselves where our code is located and then run the terraform init command from the terminal: The terraform plan command can then be executed, and we will obtain the execution plan as a result. This field can be used to specify a custom configuration file or to add additional metadata, such as the task, task definition, cluster, and container instance details to the log event. requirescompatibilities - (Optional) Set of launch types required by the task. You can find these names by selecting the targeted cluster on your Amazon ECS dashboard. ARN of the task execution role that the Amazon ECS container agent and the Docker daemon can assume. Register this task definition with: aws ecs register-task-definition --cli-input-json file://task-def. json With jq we extract the actual task definition and write it to a file. Step 4: Inject SSM Parameter into ECS. For tasks that use the EC2 launch type, if the stopTimeout parameter isn’t specified, the value set for the Amazon ECS container agent configuration variable ECS _CONTAINER_STOP_TIMEOUT is used. Using the same IAM task role for all tasks. -aws ecs describe-task-definition --task-definition green-blue-ecs-example | \ jq '. json --ephemeral-storage="sizeInGiB=100" able to confirm ephemeral-storage using aws ecs describe-task-definiton terraform import aws_ecs_task_definition. yaml file). This is part 1 and part 2: Using ECS to run Docker containers on >-upload Docker image to. AWS CLI ECS Cheatsheet. Under 'Select launch type compatibility: Choose 'EC2' and click on the next step. A family groups multiple versions of a task definition. json file. It then updates the task definition with the new image ID, and deploys the task. json However the following do not work: $ cat. tf, set the environment variables specified at the top of the file, and fill in any other variables that don't have a default. For example, this AWS-provided sample task definition, stores the password of a MySQL database in an environment variable. In this example, we deployed an application as a standalone task. Second, we need to define the task role which the. Create a pipeline to update the services running on the ECS cluster. The task definition is a text file, in JSON format, that describes one or more containers, up to a maximum of ten, that form your application. Here are a few examples: TLS/SSL termination Log collection Container hardening Health checks for legacy apps that don't expose an HTTP endpoint How to implement encrypted (HTTPS) communication for. :GITHUB_ACTION: The name of the action currently running, or the id of a step. Log in to your AWS Web Console and navigate to the ECS section. Make sure to customize the examples, such as using your account ID. # CHANGE SERVICE aws ecs update-service -service projectname -task-definition projectname -cluster projectname -force-new-deployment -desired-count 1 -health-check-grace-period-seconds 300. This includes an ECS cluster, IAM policy document (to allow ECS tasks to assume a role), an IAM role, an ECS task definition (which uses the Node. Every time you start a task (either through the StartTask and RunTask API calls or that is started automatically as part of a Service), the ECS Agent will perform a docker pull of the image you specify in your task definition. CI_AWS_ECS_TASK_DEFINITION_FILE: If the task definition is a JSON file in GitLab, the filename, including the path. We will place an example JSON in the location of the ECS. json Go to file Go to file T; Go to line L; Copy path Copy permalink;. ARN of the task execution role that the Amazon ECS container agent and the Docker daemon can assume. Private Repositories other than AWS ECR may need authentication. Then, select Task Definitions. family - (Required) A unique name for your task definition. task definition. If the same application (same project name) is. json: "family" : "ecs-cvs-behaviour-staging" ,. This is similar to a name for multiple versions of the task definition, specified with a. It can be thought of as a blueprint for your application. These are what run on the cluster. version' | 's/^"//' -e 's/"$//') Sign up for free to join this conversation on GitHub. ECS Instance: an EC2 instance running the ECS agent and attached to an ECS cluster. Add AWS_ACCESS_KEY_ID as the name and paste the Access Key ID from the console. Task definitions specify various parameters for your application. status -> (string). It can be expressed as an integer using CPU units (for example, 1024) or as a string using vCPUs (for example, 1 vCPU or 1 vcpu) in a task definition. ECS Deploy - task-definitions. You can find an example definition from the Amazon ECS FireLens Examples on GitHub. This section provides some JSON task definition examples that you can use to start creating your own task definitions. For example. Example 1: To register a task definition with a JSON file. If you want to bump these revisions without that type of flow you could use. I am silly, turns out I had a blank space at the start of the task-definition. 0: of community. The following example builds a new container image tagged with the commit ID, inserts the new image ID as the image for the my-container container in the task definition file, and then deploys the rendered task definition file to ECS:. If you use the same script or action. Here is a complete definition of a container as a JSON document:. ECS (Elastic Container) EFS (Elastic File System) EKS (Elastic Kubernetes) ELB (Elastic Load. I did not show a Task Definition in the diagram because a Task is simply an "instance" of Task Definition. It can be thought of as a blueprint for your application. Here's an example of how to do it on Docker Hub: Create a public repository called sun-api on Docker Hub. Jul 26, 2021 · A task definition is a set of instructions that tells Amazon ECS how to run Docker containers. So, what is the right way to specify the name of task json files? Here's how I have done it:. Run the ECS Task Definition in the ECS Cluster Wait for the ECS Task to exit and return its exit code How do you run this example? To run this example, you need to do the following: Build the AMI Apply the Terraform templates Run the ECS Task Build the AMI See the example-ecs-instance-ami docs. The task definition is a text file, in JSON format, that describes one or more containers, up to a maximum of ten, that form your application. The task definition is a text file, in JSON format, that describes one or more containers, up to a. traxxas website how to find lost toyota smart key printable credit card convenience fee sign helluva boss 3d models product image slider for shopify dawn theme open. The Task can be split into following three Steps: As a step one ( clone) the application will be cloned from tekton -tutorial master branch. Amazon ECS gives the first task definition that you registered to a family a revision number of 1. Terraform Aws Ecs Container Definition is an open source software project. A family groups multiple versions of a task definition. I'll continue with the parts that. Web UI Task Definition. To register the task definition: $ aws ecs register-task-definition --cli-input-json file://task-definition. A task definition is required to run Docker containers on Amazon ECS. Deploy Multiple ECS Sidecar Containers. To register the task definition: $ aws ecs register-task-definition --cli-input-json file://task-definition. The local JSON file shall be located in the root folder of the the user's project (say a. This is how template can be constructed from two directories containing particular json/yaml files. It allows the application to run in the cloud without. There is a Task role in the ECS task definition that can specify a set of Amazon ECS task IAM role, this IAM role needs to include the following permissions, or it can be defined as an IAM policy and referenced to multiple IAM roles. The task definition is a text file, in JSON format, that describes one or more containers, up to a maximum of ten, that form your application. This is done using task definition files: JSON files holding data describing the containers needed to run a service. Go to the ECS console and choose 'Task Definitions' -> 'Create new task definition'. Scroll down to Volumes. The following task definition example demonstrates how to specify a log configuration that forwards logs to an Amazon OpenSearch Service; domain. new file: terraform/ecs. If the requires_compatibilities is FARGATE this field is required. ; Click on Task Definitions in the left menu, then click the Create new Task Definition button or choose an existing Fargate task definition. It allows the application to run in the cloud without. json Go to file Go to file T; Go to line L; Copy path Copy permalink;. From the navigation pane, choose Task Definitions, and then choose Create new Task Definition. The container definitions are saved in JSON format at the specified file location. hypnopimp, olivia holt nudes
Network Mode: host. . Ecs task definition json example
These are what run on the cluster. Then the step two ( build. Task Definition. security baseline configuration checklist Note that this action returns the value task-definition as explained in the action. environment}", This indicates where the logs should be sent to for the respective task. These are what run on the cluster. Registers an Amazon ECS task definition, and deploys it to an ECS service. You can specify an. Email address. To prepare your application to run on Amazon ECS, you create a task definition. ; execution_role_arn - (Optional) The Amazon Resource Name (ARN) of the task execution role that the Amazon ECS container agent and the Docker daemon can assume. What is Task Definition in ECS? A task definition is required to run Docker containers in Amazon ECS. 0: of community. ECS EC2 Template Another example is installing ADOTCollector on ECS EC2 instance as sidecar to send telemetry data. Aws_ecs_task_definition keyword, Show keyword suggestions, Related keyword, Domain List. json With jq we extract the actual task definition and write it to a file. Create task definition. json However the following do not work: $ cat. If using the Fargate launch type, this field is required and is limited by the cpu. json the image is myimage:2 Is there any methode to update the task-definition. iowa vehicle registration phone number. In your task definition,. ECS Task Execution Role. traxxas website how to find lost toyota smart key printable credit card convenience fee sign helluva boss 3d models product image slider for shopify dawn theme open. The definition Runs the ECS task and check the error type TaskFailed , retires after 10 seconds and tries 3 more times until success. NET 5, C# & AWS ECS SDK | by Adityanand Pasumarthi | The AWS Coder | Medium Write Sign up Sign In 500 Apologies, but something went wrong. Paste the following into the JSON file. This is part 1 and part 2: Using ECS to run Docker containers on >-upload Docker image to. steve moy married at first sight net worth. Configure the AWS CLI config file, and then verify that the task assumes the IAM role in the destination account: Using the ECS exec command to access the container $ aws ecs execute-command --cluster example-cluster --task example-taskID --container test --interactive --command "/bin/bash" The Session Manager plugin was installed. 64 KiB for ECS task definition JSON string. Use task and service definitions to deploy containers to the cluster. Then the step two ( build. resource "aws_ecs_task_definition" "scheduler-definition" { family = "scheduler-test" container_definitions = jsonencode( [ { "name" = "scheduler", "image" = format("%s/%s", var. json Note: If you receive errors when running AWS CLI commands, make sure that you’re using the most recent version of the AWS CLI. I am working with ECS, and I have one task definition, where I added a few ENVs. json However the following do not work: $ cat. The two ECS task definition templates are provided to run ADOT Collector as sidecar to send application metrics and traces on Amazon ECS. Web UI Task Definition. TaskDefinition Manages a revision of an ECS task definition to be used in aws. The Task can be split into following three Steps: As a step one ( clone) the application will be cloned from tekton -tutorial master branch. In this exam example, "driver-service" details. String values are converted to an integer indicating the MiB when the task definition is registered. json codedeploy-application: my-codedeploy-application codedeploy-deployment-group: my-codedeploy-deployment-group. The Amazon OpenSearch Service domain must already exist. ecs] describe-task-definition¶ Description¶ Describes a task definition. github/workflows folder. Now we substitute every environment variable in the appspec_template. a database, web frontend, and perhaps some for maintenance/cron) is specified in a Task Definition. On the ECS console, go to Task Definitions > Create new Task Definition. Moving on to the task-definition. I'm trying to add secrets to a task definition but can't find a way to specify which key to use from the key/value in the secret. iowa vehicle registration phone number. When we run the Kaniko task we run a task definition with a specific revision number. The format of the file should be the same as the output generated by: Shell. I copied the task definition JSON from the actual task definition I created in the AWS console. However, you might need to remove some parts of the definition, before pushing back to AWS - in that case jq is quite helpful. dumps (response, indent =4)). Each instance is based on the ECS-Optimized Amazon Linux AMI , which has the ECS Container Agent installed that knows how to talk to the ECS Cluster. The container_definition is a string of JSON-encoded container definitions. AWS : CLI (Command Line Interface) AWS : CLI (ECS with ALB & autoscaling) AWS : ECS with cloudformation and json task definition. Create ECS Cluster with 1 Container Instance; Create a Task Definition; Create an ELB and Target Group to later. client ("ecs", region_name ="us-east-1") response = client. Now we substitute every environment variable in the appspec_template. - name: Deploy to Amazon ECS uses: aws-actions/amazon-ecs-deploy-task-definition@v1 with : task-definition: task-definition. Multiple API calls may be issued in order to retrieve the entire data set of results. The task definition is a text file, in JSON format, that describes one or more containers, up to a maximum of ten, that form your application. Using the same IAM task role for all tasks. $ aws ecs register-task-definition --cli-input-json file://task-definition. The ECS control plane is responsible for provisioning the. The valid values are none, bridge, and host. json Bailey Davis Sep 18, 2021 Hi,. See Ephemeral Storage. Example ECS Instance AMI This folder contains a Packer template we use to create the Amazon Machine Images (AMIs) that run on each EC2 Instance in our ECS Cluster. This will create a volume if it doesn't exist or mount the existing volume if it's already been created. requirescompatibilities - (Optional) Set of launch types required by the task. Returns a list of task definitions that are registered to your account. I copied the task definition JSON from the actual task definition I created in the AWS console. Using the Framework definition validation (backed by JSON Schema) I was able to validate complex configuration which has been supplied with ease. If you want to bump these revisions without that type of flow you could use. Hello, i have a pipeline to deploy to my ECS Cluster with 2 steps , the first one is building new docker image with a new tag for example myimage:3 and in my task-definition. Join Us. created task definition using cli aws ecs register-task-definition --cli-input-json file://xyz. ECS Deploy - task-definitions. This is the blueprint describing which Docker containers to run and represents your application. Assuming you have already created an ECS cluster in your VPC (you can use default cluster and VPC created by AWS), and have an API key for your Prefect agent, let's create a task definition for ECS Prefect agent using AWS CLI. You can specify which Docker images to use, the required resources, and other configurations related to launching the task definition through an Amazon ECS service or task. If using the EC2 launch type, this field is optional and any value can be used. $ aws ecs register-task-definition --cli-input-json file. Use Cases Have Terraform generate valid task definitions dynamically Update the ECS task definition and trigger new service deployments automatically (see examples/ecs_update_service. requirescompatibilities - (Optional) Set of launch types required by the task. added in 2. So anyway you will have to update the image in your task definition , unless you use latest tag. Choose your launch type, and then choose Next step. <div class="navbar header-navbar"> <div class="container"> <div class="navbar-brand"> <a href="/" id="ember34" class="navbar-brand-link active ember-view"> <span id. The task definition is a text file, in JSON format, that describes one or more containers, up to a. nb Fiction Writing. maintained illuminance knutsford express courier schedule no contact after acting desperate. You can also 'autoprovision' the volume in the definition. yaml with envsubst and write it to the actual appspec. AdamClarey Sep 16, 2020. Set the name of the awslogs-group to the one we chose in step 1. Task definitions are written in JSON or manually configured through the AWS Management Console. json Go to file Go to file T Go to line L Copy path Copy permalink This commit does not belong to any branch on this repository, and may belong to a. Task Definition File. json file: aws ecs register-task-definition —cli-input-json file://example-task-def. The Task can be split into following three Steps: As a step one ( clone) the application will be cloned from tekton -tutorial master branch. Argument Reference. Select EC2 and then Next step. A tag already exists with the provided branch name. aws ecs run-task --cluster $CLUSTER_NAME --launch-type EXTERNAL --task-definition dt-orders-customer-service Within the AWS console, verify the task is listed with a status of RUNNING as shown in the example below: Monitor the container running with the OneAgent with Dynatrace web console. Please note that you should only provide values that are part of the container definition document. A working example is: $ aws ecs register-task-definition --cli-input-json file://. . crossdressing for bbc