feat(conf): cluster/node conf to hocon

apps/emqx/etc/emqx.conf

@@ -1,23 +1,13 @@
 ## EMQ X Configuration 4.3
 
-## NOTE: Do not change format of CONFIG_SECTION_{BGN,END} comments!
+##--------------------------------------------------------------------
-
+## Cluster
-## CONFIG_SECTION_BGN=cluster ==================================================
+##--------------------------------------------------------------------
-
+cluster: {
     ## Cluster name.
     ##
     ## Value: String
-cluster.name = emqxcl
+    name: emqxcl
-
-## Specify the erlang distributed protocol.
-##
-## Value: Enum
-##  - inet_tcp: the default; handles TCP streams with IPv4 addressing.
-##  - inet6_tcp: handles TCP with IPv6 addressing.
-##  - inet_tls: using TLS for Erlang Distribution.
-##
-## vm.args: -proto_dist inet_tcp
-cluster.proto_dist = inet_tcp
 
     ## Cluster auto-discovery strategy.
     ##
@@ -30,14 +20,7 @@ cluster.proto_dist = inet_tcp
     ## - k8s:    Kubernetes
     ##
     ## Default: manual
-cluster.discovery = manual
+    discovery: manual
-
-## Enable cluster autoheal from network partition.
-##
-## Value: on | off
-##
-## Default: on
-cluster.autoheal = on
 
     ## Autoclean down node. A down node will be removed from the cluster
     ## if this value > 0.
@@ -48,142 +31,160 @@ cluster.autoheal = on
     ## -s: second, e.g. '30s' for 30 seconds
     ##
     ## Default: 5m
-cluster.autoclean = 5m
+    autoclean: "5m"
+
+    ## Enable cluster autoheal from network partition.
+    ##
+    ## Value: on | off
+    ##
+    ## Default: on
+    autoheal: on
+
+    ## Specify the erlang distributed protocol.
+    ##
+    ## Value: Enum
+    ##  - inet_tcp: the default; handles TCP streams with IPv4 addressing.
+    ##  - inet6_tcp: handles TCP with IPv6 addressing.
+    ##  - inet_tls: using TLS for Erlang Distribution.
+    ##
+    ## vm.args: -proto_dist inet_tcp
+    proto_dist: inet_tcp
 
-##--------------------------------------------------------------------
     ## Cluster using static node list
-
+    static: {
         ## Node list of the cluster.
         ##
         ## Value: String
-## cluster.static.seeds = "emqx1@127.0.0.1,emqx2@127.0.0.1"
+        ## seeds: "emqx1@127.0.0.1,emqx2@127.0.0.1"
+    }
 
     ##--------------------------------------------------------------------
     ## Cluster using IP Multicast.
-
+    mcast: {
         ## IP Multicast Address.
         ##
         ## Value: IP Address
-## cluster.mcast.addr = "239.192.0.1"
+        ## addr = "239.192.0.1"
 
         ## Multicast Ports.
         ##
         ## Value: Port List
-## cluster.mcast.ports = "4369,4370"
+        ## ports = "4369,4370"
 
         ## Multicast Iface.
         ##
         ## Value: Iface Address
         ##
         ## Default: "0.0.0.0"
-## cluster.mcast.iface = "0.0.0.0"
+        ## iface: "0.0.0.0"
 
         ## Multicast Ttl.
         ##
         ## Value: 0-255
-## cluster.mcast.ttl = 255
+        ## ttl: 255
 
         ## Multicast loop.
         ##
         ## Value: on | off
-## cluster.mcast.loop = on
+        ## loop: on
+    }
 
     ##--------------------------------------------------------------------
     ## Cluster using DNS A records.
-
+    dns: {
         ## DNS name.
         ##
         ## Value: String
-## cluster.dns.name = localhost
+        ## name: localhost
 
         ## The App name is used to build 'node.name' with IP address.
         ##
         ## Value: String
-## cluster.dns.app = emqx
+        ## app: emqx
+    }
 
     ##--------------------------------------------------------------------
     ## Cluster using etcd
-
+    etcd: {
         ## Etcd server list, seperated by ','.
         ##
         ## Value: String
-## cluster.etcd.server = "http://127.0.0.1:2379"
+        ## server: "http://127.0.0.1:2379"
 
         ## Etcd api version
         ##
         ## Value: Enum
         ## - v2
         ## - v3
-## cluster.etcd.version = v3
+        ## version: v3
 
         ## The prefix helps build nodes path in etcd. Each node in the cluster
         ## will create a path in etcd: v2/keys/<prefix>/<cluster.name>/<node.name>
         ##
         ## Value: String
-## cluster.etcd.prefix = emqxcl
+        ## prefix: emqxcl
 
         ## The TTL for node's path in etcd.
         ##
         ## Value: Duration
         ##
         ## Default: 1m, 1 minute
-## cluster.etcd.node_ttl = 1m
+        ## node_ttl: 1m
 
+        ## ssl:{
         ##     Path to a file containing the client's private PEM-encoded key.
-##
         ##     Value: File
-## cluster.etcd.ssl.keyfile = "{{ platform_etc_dir }}/certs/client-key.pem"
+        ##     keyfile: "{{ platform_etc_dir }}/certs/client-key.pem"
 
         ##     The path to a file containing the client's certificate.
-##
         ##     Value: File
-## cluster.etcd.ssl.certfile = "{{ platform_etc_dir }}/certs/client.pem"
+        ##     certfile: "{{ platform_etc_dir }}/certs/client.pem"
 
         ##     Path to the file containing PEM-encoded CA certificates. The CA certificates
         ##     are used during server authentication and when building the client certificate chain.
-##
         ##     Value: File
-## cluster.etcd.ssl.cacertfile = "{{ platform_etc_dir }}/certs/ca.pem"
+        ##     cacertfile: "{{ platform_etc_dir }}/certs/ca.pem"
-
+        # }
+    }
     ##--------------------------------------------------------------------
     ## Cluster using Kubernetes
+    k8s: {
+        # Kubernetes API server list, seperated by ','.
+        # Value: String
+        # apiserver: "http://10.110.111.204:8080"
 
-## Kubernetes API server list, seperated by ','.
+        # The service name helps lookup EMQ nodes in the cluster.
-##
+        # Value: String
-## Value: String
+        # service_name: emqx
-## cluster.k8s.apiserver = "http://10.110.111.204:8080"
 
-## The service name helps lookup EMQ nodes in the cluster.
+        # The address type is used to extract host from k8s service.
-##
+        # Value: ip | dns | hostname
-## Value: String
+        # address_type: ip
-## cluster.k8s.service_name = emqx
 
-## The address type is used to extract host from k8s service.
+        # The app name helps build 'node.name'.
-##
+        # Value: String
-## Value: ip | dns | hostname
+        # app_name: emqx
-## cluster.k8s.address_type = ip
 
-## The app name helps build 'node.name'.
+        # The suffix added to dns and hostname get from k8s service
-##
+        # Value: String
-## Value: String
+        # suffix: pod.cluster.local
-## cluster.k8s.app_name = emqx
 
-## The suffix added to dns and hostname get from k8s service
+        # Kubernetes Namespace
-##
+        # Value: String
-## Value: String
+        # namespace: default
-## cluster.k8s.suffix = pod.cluster.local
+    }
+    db_backend: mnesia
+    rlog: {
+        # role: core
+        # core_nodes: []
+    }
 
-## Kubernetes Namespace
+}
-##
-## Value: String
-## cluster.k8s.namespace = default
-
-## CONFIG_SECTION_END=cluster ==================================================
 
 ##--------------------------------------------------------------------
 ## Node
 ##--------------------------------------------------------------------
-
+node: {
     ## Node name.
     ##
     ## See: http://erlang.org/doc/reference_manual/distributed.html
@@ -191,22 +192,22 @@ cluster.autoclean = 5m
     ## Value: <name>@<host>
     ##
     ## Default: emqx@127.0.0.1
-node.name = "emqx@127.0.0.1"
+    name: "emqx@127.0.0.1"
 
     ## Cookie for distributed node communication.
     ##
     ## Value: String
-node.cookie = "emqxsecretcookie"
+    cookie: "emqxsecretcookie"
 
     ## Data dir for the node
     ##
     ## Value: Folder
-node.data_dir = "{{ platform_data_dir }}"
+    data_dir: "{{ platform_data_dir }}"
 
     ## The config file dir for the node
     ##
     ## Value: Folder
-node.etc_dir = "{{ platform_etc_dir }}"
+    etc_dir: "{{ platform_etc_dir }}"
 
     ## Heartbeat monitoring of an Erlang runtime system. Comment the line to disable
     ## heartbeat, or set the value as 'on'
@@ -214,7 +215,7 @@ node.etc_dir = "{{ platform_etc_dir }}"
     ## Value: on
     ##
     ## vm.args: -heart
-## node.heartbeat = on
+    ## heartbeat: on
 
     ## Sets the number of threads in async thread pool. Valid range is 0-1024.
     ##
@@ -223,7 +224,7 @@ node.etc_dir = "{{ platform_etc_dir }}"
     ## Value: 0-1024
     ##
     ## vm.args: +A Number
-## node.async_threads = 4
+    ## async_threads: 4
 
     ## Sets the maximum number of simultaneously existing processes for this
     ## system if a Number is passed as value.
@@ -233,7 +234,7 @@ node.etc_dir = "{{ platform_etc_dir }}"
     ## Value: Number [1024-134217727]
     ##
     ## vm.args: +P Number
-## node.process_limit = 2097152
+    ## process_limit: 2097152
 
     ## Sets the maximum number of simultaneously existing ports for this system.
     ##
@@ -242,7 +243,7 @@ node.etc_dir = "{{ platform_etc_dir }}"
     ## Value: Number [1024-134217727]
     ##
     ## vm.args: +Q Number
-## node.max_ports = 1048576
+    ## max_ports: 1048576
 
     ## Sets the distribution buffer busy limit (dist_buf_busy_limit).
     ##
@@ -251,7 +252,7 @@ node.etc_dir = "{{ platform_etc_dir }}"
     ## Value: Number [1KB-2GB]
     ##
     ## vm.args: +zdbbl size
-## node.dist_buffer_size = 8MB
+    ## dist_buffer_size: 8MB
 
     ## Sets the maximum number of ETS tables. Note that mnesia and SSL will
     ## create temporary ETS tables.
@@ -259,7 +260,7 @@ node.etc_dir = "{{ platform_etc_dir }}"
     ## Value: Number
     ##
     ## vm.args: +e Number
-## node.max_ets_tables = 262144
+    ## max_ets_tables: 262144
 
     ## Global GC Interval.
     ##
@@ -271,19 +272,19 @@ node.etc_dir = "{{ platform_etc_dir }}"
     ##  - 20s: 20 seconds
     ##
     ## Defaut: 15 minutes
-node.global_gc_interval = 15m
+    global_gc_interval: 15m
 
     ## Tweak GC to run more often.
     ##
     ## Value: Number [0-65535]
     ##
     ## vm.args: -env ERL_FULLSWEEP_AFTER Number
-## node.fullsweep_after = 1000
+    ## fullsweep_after: 1000
 
     ## Crash dump log file.
     ##
     ## Value: Log file
-node.crash_dump = "{{ platform_log_dir }}/crash.dump"
+    crash_dump: "{{ platform_log_dir }}/crash.dump"
 
     ## Specify SSL Options in the file if using SSL for Erlang Distribution.
     ##
@@ -301,7 +302,7 @@ node.crash_dump = "{{ platform_log_dir }}/crash.dump"
     ## Value: Number
     ##
     ## vm.args: -kernel net_ticktime Number
-## node.dist_net_ticktime = 120
+    ## dist_net_ticktime: 120
 
     ## Sets the port range for the listener socket of a distributed Erlang node.
     ## Note that if there are firewalls between clustered nodes, this port segment
@@ -310,10 +311,11 @@ node.crash_dump = "{{ platform_log_dir }}/crash.dump"
     ## See: http://www.erlang.org/doc/man/kernel_app.html
     ##
     ## Value: Port [1024-65535]
-node.dist_listen_min = 6369
+    dist_listen_min: 6369
-node.dist_listen_max = 6369
+    dist_listen_max: 6369
+    backtrace_depth: 16
+}
 
-node.backtrace_depth = 16
 
 ## CONFIG_SECTION_BGN=rpc ======================================================