github.com/cilium/cilium@v1.16.2/Documentation/observability/hubble/index.rst (about)

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     7  .. _hubble_intro:
     8  
     9  *********************************
    10  Network Observability with Hubble
    11  *********************************
    12  
    13  Observability is provided by Hubble which enables deep visibility into the
    14  communication and behavior of services as well as the networking infrastructure
    15  in a completely transparent manner. Hubble is able to provide visibility at the
    16  node level, cluster level or even across clusters in a :ref:`Cluster Mesh`
    17  scenario. For an introduction to Hubble and how it relates to Cilium, read the
    18  section :ref:`intro`.
    19  
    20  By default, Hubble API operates within the scope of the individual node on which the
    21  Cilium agent runs. This confines the network insights to the traffic observed by the local
    22  Cilium agent. Hubble CLI (``hubble``) can be used to query the Hubble API provided via a local
    23  Unix Domain Socket. The Hubble CLI binary is installed by default on Cilium agent pods.
    24  
    25  Upon deploying Hubble Relay, network visibility is provided for the entire cluster or even
    26  multiple clusters in a ClusterMesh scenario. In this mode, Hubble data can be accessed by
    27  directing Hubble CLI (``hubble``) to the Hubble Relay service or via Hubble UI.
    28  Hubble UI is a web interface which enables automatic discovery of the services dependency
    29  graph at the L3/L4 and even L7 layer, allowing user-friendly visualization and filtering
    30  of data flows as a service map.
    31  
    32  .. toctree::
    33     :maxdepth: 2
    34     :glob:
    35  
    36     setup
    37     hubble-cli
    38     hubble-ui
    39     configuration/export
    40     configuration/tls