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scoutfs: update README.md for server_addr

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Update the instructions for starting up a system with the quorum count
mkfs option and server_addr mount option.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2019-08-07 15:16:35 -07:00
committed by Zach Brown
parent 15a492fe57
commit b1cc8b1a59
1 changed files with 8 additions and 11 deletions
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19
kmod/README.md
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@@ -72,7 +72,7 @@ The steps for getting scoutfs mounted and operational are:
2. Make a new filesystem on the device with the userspace utilities
3. Mount the device on all the nodes
In this example we run all of these commands on two nodes. The block
In this example we run all of these commands on three nodes. The block
device name is the same on all the nodes.
1. Get the Kernel Module and Userspace Binaries
@@ -96,29 +96,26 @@ device name is the same on all the nodes.
git clone git@github.com:versity/scoutfs-utils-dev.git
make -C scoutfs-utils-dev
alias scoutfs=$PWD/scoutfs-utils-dev/src/scoutfs
```
2. Make a New Filesystem (**destroys contents, no questions asked**)
We specify that every node will participate in quorum voting by
configuring each in the super block with options to mkfs.
We specify that two of our three nodes must be present to form a
quorum for the system to function.
```shell
scoutfs mkfs --quorum_slot node1:0:172.16.1.1 \
--quorum_slot node2:0:172.16.1.2 /dev/shared_block_device
scoutfs mkfs -Q 2 /dev/shared_block_device
```
3. Mount the Filesystem
Each mounting node provides the name that was given to the
quorum\_slot option to mkfs.
Each mounting node provides its local IP address on which it will run
an internal server for the other mounts if it is elected the leader by
the quorum.
```shell
mkdir /mnt/scoutfs
mount -t scoutfs -o uniq_name=$NODENAME /dev/shared_block_device /mnt/scoutfs
mount -t scoutfs -o server_address=$NODE_ADDR /dev/shared_block_device /mnt/scoutfs
```
4. For Kicks, Observe the Metadata Change Index