book updates (#2345)

* edit log rotation page

* update command line options

* add github edit button

Author: unixpi

docs/the_nimbus_book/book.toml

@@ -5,5 +5,12 @@ multilingual = false
 src = "src"
 title = "The Nimbus Beacon Chain Book"
 
+[preprocessor.open-on-gh]
+command = "mdbook-open-on-gh"
+renderer = ["html"]
+
 [output.html]
 additional-css = ["custom.css"]
+git-repository-url = "https://github.com/status-im/nimbus-eth2"
+git-branch = "unstable"
+

docs/the_nimbus_book/custom.css

@@ -40,3 +40,12 @@
 blockquote {
     padding: 10px 20px;
 }
+
+footer {
+    margin-top: 1rem;
+    margin-bottom: 1rem;
+    font-size: 0.8em;
+    text-align: center;
+    border-top: 1px solid black;
+    padding: 10px 0;
+}

docs/the_nimbus_book/src/log-rotate.md

@@ -1,14 +1,14 @@
 # Log rotation
 
-Nimbus logs are written to the console, and optionally to a file. Using the log file option for a long-running process may lead to difficulties when the file grows large. This is typically solved with a log rotator that will switch which file is witten to as well as compress and remove old logs.
+Nimbus logs are written to the console, and optionally to a file. Writing to a file for a long-running process may lead to difficulties when the file grows large. This is typically solved with a *log rotator*. A log rotator is responsible for switching the written to file, as well as compressing and removing old logs.
 
 To set up file-based log rotation, an application such as [rotatelogs](https://httpd.apache.org/docs/2.4/programs/rotatelogs.html) is used - `rotatelogs` is available on most servers and can be used with `docker`, `systemd` and manual setups to write rotated logs files.
 
-In particular, when using `systemd` and its accompanying `journald` log daemon, this setup avoids clogging the the system log and keep the Nimbus logs in a separate location.
+In particular, when using `systemd` and its accompanying `journald` log daemon, this setup avoids clogging the the system log by keeping the Nimbus logs in a separate location.
 
 ## Compression
 
-`rotatelogs` works by reading stdin and redirecting it to a file based on a name pattern. Whenever the log is about to be rotated, the application will invoke a shell script with the old and new log files. Our aim is to compress the log file to save space. [repo](https://github.com/status-im/nimbus-eth2/tree/unstable/scripts/rotatelogs-compress.sh) provides a helper script to do so:
+`rotatelogs` works by reading stdin and redirecting it to a file based on a name pattern. Whenever the log is about to be rotated, the application invokes a shell script with the old and new log files. Our aim is to compress the log file to save space. [repo](https://github.com/status-im/nimbus-eth2/tree/unstable/scripts/rotatelogs-compress.sh) provides a helper script to do so:
 
 ```bash
 # Create a rotation script for rotatelogs
@@ -28,7 +28,7 @@ chmod +x rotatelogs-compress.sh
 
 ## Build
 
-Logs in files generally don't benefit from colors - to avoid colors being written to the file, additional flags can be added to the Nimbus [build process](./build.md) - these flags are best saved in a build script to which one can add more options. Future versions of Nimbus will support disabling colors at runtime.
+Logs in files generally don't benefit from colors. To avoid colors being written to the file, additional flags can be added to the Nimbus [build process](./build.md) -- these flags are best saved in a build script to which one can add more options. Future versions of Nimbus will support disabling colors at runtime.
 
 ```bash
 
@@ -41,7 +41,7 @@ EOF
 
 ## Run
 
-The final step is to redirect logs to `rotatelogs` using a pipe when starting nimbus:
+The final step is to redirect logs to `rotatelogs` using a pipe when starting Nimbus:
 
 ```bash
 build/nimbus_beacon_node \
@@ -50,11 +50,11 @@ build/nimbus_beacon_node \
   --data-dir:$DATADIR | rotatelogs -L "$DATADIR/nbc_bn.log" -p "/path/to/rotatelogs-compress.sh" -D -f -c "$DATADIR/log/nbc_bn_%Y%m%d%H%M%S.log" 3600
 ```
 
-The options used in this example will:
+The options used in this example do the following:
 
-* `-L nbc_bn.log` - symlink to the latest log file, for use with `tail -F`
-* `-p "/path/to/rotatelogs-compress.sh"` - script to run when rotation is about to happen
-* `-D` - create the `log` directory if needed
-* `-f` - open the log immediately when starting `rotatelogs`
-* `-c "$DATADIR/log/nbc_bn_%Y%m%d%H%M%S.log"` - include timestamp in log filename
-* `3600` - rotate logs every hour (3600 seconds)
+* `-L nbc_bn.log` - symlinks to the latest log file, for use with `tail -F`
+* `-p "/path/to/rotatelogs-compress.sh"` - runs `rotatelogs-compress.sh` when rotation is about to happen
+* `-D` - creates the `log` directory if needed
+* `-f` - opens the log immediately when starting `rotatelogs`
+* `-c "$DATADIR/log/nbc_bn_%Y%m%d%H%M%S.log"` - includes timestamp in log filename
+* `3600` - rotates logs every hour (3600 seconds)

docs/the_nimbus_book/src/options.md

@@ -21,23 +21,23 @@ nimbus_beacon_node [OPTIONS]... command
 
 The following options are available:
 
-     --log-level               Sets the log level.
+     --log-level               Sets the log level for process and topics (e.g. "DEBUG;
+                               TRACE:discv5,libp2p; REQUIRED:none; DISABLED:none").
      --log-file                Specifies a path for the written Json log file.
      --network                 The Eth2 network to join.
  -d, --data-dir                The directory where nimbus will store all blockchain data.
      --validators-dir          A directory containing validator keystores.
      --secrets-dir             A directory containing validator keystore passwords.
      --wallets-dir             A directory containing wallet files.
      --web3-url                URL of the Web3 server to observe Eth1.
-     --deposit-contract        Address of the deposit contract.
-     --deposit-contract-block  The Eth1 block number or hash where the deposit contract has
-                               been deployed.
      --non-interactive         Do not display interative prompts. Quit on missing
                                configuration.
      --netkey-file             Source of network (secp256k1) private key file
                                (random|<path>) (default: random).
      --insecure-netkey-password  Use pre-generated INSECURE password for network private key
                                file (default: false).
+     --agent-string            Node agent string which is used as identifier in network.
+     --subscribe-all-subnets   Subscribe to all attestation subnet topics when gossiping.
  -b, --bootstrap-node          Specifies one or more bootstrap nodes to use when connecting
                                to the network.
      --bootstrap-file          Specifies a line-delimited file of bootstrap Ethereum network
@@ -49,6 +49,10 @@ The following options are available:
      --max-peers               The maximum number of peers to connect to.
      --nat                     Specify method to use for determining public address. Must be
                                one of: any, none, upnp, pmp, extip:<IP>.
+     --enr-auto-update         Discovery can automatically update its ENR with the IP
+                               address and UDP port as seen by other nodes it communicates
+                               with. This option allows to enable/disable this
+                               functionality.
      --weak-subjectivity-checkpoint  Weak subjectivity checkpoint in the format
                                block_root:epoch_number.
      --finalized-checkpoint-state  SSZ file specifying a recent finalized state.
@@ -76,5 +80,11 @@ The following options are available:
      --discv5                  Enable Discovery v5.
      --dump                    Write SSZ dumps of blocks, attestations and states to data
                                dir.
-							   ```
+     --doppelganger-detection  Whether to detect whether another validator is be running the
+                               same validator keys (default true).
+
+Available sub-commands:
+
+...
+```