What is the "configtx.yaml" Environment Configuration File?

"configtx.yaml" is a Configuration File used to control the Hyplerledger Composer development environment. It is located in the "composer" sub-directory:

$ cd fabric-dev-servers/fabric-scripts/hlfv12/composer
$ ls -l
-rw-r--r-- 1 fyicenter  378 Sep 29  2018 composer-channel.tx
-rw-r--r-- 1 fyicenter 6338 Sep 29  2018 composer-genesis.block
-rw-r--r-- 1 fyicenter 4504 Sep 29  2018 configtx.yaml
drwxr-xr-x 4 fyicenter 4096 Apr  1 01:59 crypto-config
-rw-r--r-- 1 fyicenter 3554 Sep 29  2018 crypto-config.yaml
-rw-r--r-- 1 fyicenter 2769 Oct 12 22:00 docker-compose-dev.yml
-rw-r--r-- 1 fyicenter 2726 Oct 12 21:59 docker-compose.yml
-rw-r--r-- 1 fyicenter  869 Sep 29  2018 howtobuild.txt

$ more configtx.yaml
# Copyright IBM Corp. All Rights Reserved.
#
# SPDX-License-Identifier: Apache-2.0
#

---
################################################################################
#
#   Profile
#
#   - Different configuration profiles may be encoded here to be specified
#   as parameters to the configtxgen tool
#
################################################################################
Profiles:

    ComposerOrdererGenesis:
        Orderer:
            <<: *OrdererDefaults
            Organizations:
                - *OrdererOrg
        Consortiums:
            ComposerConsortium:
                Organizations:
                    - *Org1
    ComposerChannel:
        Consortium: ComposerConsortium
        Application:
            <<: *ApplicationDefaults
            Organizations:
                - *Org1

################################################################################
#
#   Section: Organizations
#
#   - This section defines the different organizational identities which will
#   be referenced later in the configuration.
#
################################################################################
Organizations:

    # SampleOrg defines an MSP using the sampleconfig.  It should never be used
    # in production but may be used as a template for other definitions
    - &OrdererOrg
        # DefaultOrg defines the organization which is used in the sampleconfig
        # of the fabric.git development environment
        Name: OrdererOrg

        # ID to load the MSP definition as
        ID: OrdererMSP

        # MSPDir is the filesystem path which contains the MSP configuration
        MSPDir: crypto-config/ordererOrganizations/example.com/msp

        # turn off security for the channel
        AdminPrincipal: Role.MEMBER

    - &Org1
        # DefaultOrg defines the organization which is used in the sampleconfig
        # of the fabric.git development environment
        Name: Org1

        # ID to load the MSP definition as
        ID: Org1MSP

        MSPDir: crypto-config/peerOrganizations/org1.example.com/msp

        # turn off security for the peer
        AdminPrincipal: Role.MEMBER

        AnchorPeers:
            # AnchorPeers defines the location of peers which can be used
            # for cross org gossip communication.  Note, this value is only
            # encoded in the genesis block in the Application section context
            - Host: peer0.org1.example.com
              Port: 7051

################################################################################
#
#   SECTION: Orderer
#
#   - This section defines the values to encode into a config transaction or
#   genesis block for orderer related parameters
#
################################################################################
Orderer: &OrdererDefaults

    # Orderer Type: The orderer implementation to start
    # Available types are "solo" and "kafka"
    OrdererType: solo
    Addresses:
        - orderer.example.com:7050

    # Batch Timeout: The amount of time to wait before creating a batch
    BatchTimeout: 2s

    # Batch Size: Controls the number of messages batched into a block
    BatchSize:

        # Max Message Count: The maximum number of messages to permit in a batch
        MaxMessageCount: 10

        # Absolute Max Bytes: The absolute maximum number of bytes allowed for
        # the serialized messages in a batch.
        AbsoluteMaxBytes: 98 MB

        # Preferred Max Bytes: The preferred maximum number of bytes allowed for
        # the serialized messages in a batch. A message larger than the preferred
        # max bytes will result in a batch larger than preferred max bytes.
        PreferredMaxBytes: 512 KB

    Kafka:
        # Brokers: A list of Kafka brokers to which the orderer connects
        # NOTE: Use IP:port notation
        Brokers:
            - 127.0.0.1:9092

    # Organizations is the list of orgs which are defined as participants on
    # the orderer side of the network
    Organizations:

################################################################################
#
#   SECTION: Application
#
#   - This section defines the values to encode into a config transaction or
#   genesis block for application related parameters
#
################################################################################
Application: &ApplicationDefaults

    # Organizations is the list of orgs which are defined as participants on
    # the application side of the network
    Organizations:

 

⇒ Hyperledger Composer Environment Components

⇐ "crypto-config.yaml" Environment Configuration File

⇑ Explorer Hyplerledger Composer Environment

⇑⇑ Hyperledger Composer Tutorials