Arvados

h1. Consul

# Service packages have dependency on consul.

# Consul package runs automatically from systemd unit.

# Consul updates /etc/resolve.conf to use consul as DNS resolver (?)

# Packages provide /etc/consul.d/package.json (e.g. /etc/consul.d/keepproxy.json)

Each service must have a unique id, but may have a common name, for example:

<pre>

{

  "service": {

    "id": "zzzzz-bi6l4-ydim6qekt9ut47f",

    "name": "keep",

    "port": 80

  }

}

</pre>

<pre>

{

  "service": {

    "id": "zzzzz-bi6l4-9e7boja2v94hfj5",

    "name": "keep",

    "port": 80

  }

}

</pre>

A query on the "keep" service returns multiple nodes:

<pre>

$ curl http://localhost:8500/v1/catalog/service/keep | jq .

[

  {

    "Node": "debian",

    "Address": "127.0.0.1",

    "TaggedAddresses": {

      "lan": "127.0.0.1",

      "wan": "127.0.0.1"

    },

    "ServiceID": "zzzzz-bi6l4-9e7boja2v94hfj5",

    "ServiceName": "keep",

    "ServiceTags": [],

    "ServiceAddress": "",

    "ServicePort": 443,

    "ServiceEnableTagOverride": false,

    "CreateIndex": 7,

    "ModifyIndex": 7

  },

  {

    "Node": "debian",

    "Address": "127.0.0.1",

    "TaggedAddresses": {

      "lan": "127.0.0.1",

      "wan": "127.0.0.1"

    },

    "ServiceID": "zzzzz-bi6l4-ydim6qekt9ut47f",

    "ServiceName": "keep",

    "ServiceTags": [],

    "ServiceAddress": "",

    "ServicePort": 80,

    "ServiceEnableTagOverride": false,

    "CreateIndex": 6,

    "ModifyIndex": 6

  }

]

</pre>