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Merge pull request #113 from mbentley/fix-devicemapper-docs 

Fixed jekyll formatting for dm docs; fixed #112
This commit is contained in:
John Mulhausen 2016-10-06 21:55:35 -07:00 committed by GitHub
parent bdc4a3b934 73fac8acb7
commit 1357a4486d
1 changed files with 153 additions and 151 deletions
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22
engine/userguide/storagedriver/device-mapper-driver.md
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@ -223,6 +223,7 @@ assumes that the Docker daemon is in the `stopped` state.
1. Log in to the Docker host you want to configure and stop the Docker daemon. 1. Log in to the Docker host you want to configure and stop the Docker daemon.
2. Install the LVM2 package. 2. Install the LVM2 package.
The LVM2 package includes the userspace toolset that provides logical volume The LVM2 package includes the userspace toolset that provides logical volume
management facilities on linux. management facilities on linux.
@ -261,7 +262,7 @@ assumes that the Docker daemon is in the `stopped` state.
$ vi /etc/lvm/profile/docker-thinpool.profile $ vi /etc/lvm/profile/docker-thinpool.profile
``` ```
8. Specify 'thin_pool_autoextend_threshold' value. 8. Specify `thin_pool_autoextend_threshold` value.
The value should be the percentage of space used before `lvm` attempts The value should be the percentage of space used before `lvm` attempts
to autoextend the available space (100 = disabled). to autoextend the available space (100 = disabled).
@ -493,7 +494,7 @@ The `Data Space` values show that the pool is 100GB total. This example extends
5. Reload devicemapper thin pool. 5. Reload devicemapper thin pool.
a. Get the pool name first. 1. Get the pool name first.
```bash ```bash
$ sudo dmsetup status | grep pool $ sudo dmsetup status | grep pool
@ -504,7 +505,7 @@ The `Data Space` values show that the pool is 100GB total. This example extends
The name is the string before the colon. The name is the string before the colon.
b. Dump the device mapper table first. 2. Dump the device mapper table first.
```bash ```bash
$ sudo dmsetup table docker-8:1-123141-pool $ sudo dmsetup table docker-8:1-123141-pool
@ -512,14 +513,14 @@ The `Data Space` values show that the pool is 100GB total. This example extends
0 209715200 thin-pool 7:1 7:0 128 32768 1 skip_block_zeroing 0 209715200 thin-pool 7:1 7:0 128 32768 1 skip_block_zeroing
``` ```
c. Calculate the real total sectors of the thin pool now. 3. Calculate the real total sectors of the thin pool now.
Change the second number of the table info (i.e. the disk end sector) to Change the second number of the table info (i.e. the disk end sector) to
reflect the new number of 512 byte sectors in the disk. For example, as the reflect the new number of 512 byte sectors in the disk. For example, as the
new loop size is 200GB, change the second number to 419430400. new loop size is 200GB, change the second number to 419430400.
d. Reload the thin pool with the new sector number 4. Reload the thin pool with the new sector number
```bash ```bash
$ sudo dmsetup suspend docker-8:1-123141-pool \ $ sudo dmsetup suspend docker-8:1-123141-pool \
@ -567,7 +568,7 @@ disk partition.
3. Reload devicemapper thin pool. 3. Reload devicemapper thin pool.
a. Get the pool name. 1. Get the pool name.
```bash ```bash
$ sudo dmsetup status | grep pool $ sudo dmsetup status | grep pool
@ -577,7 +578,7 @@ disk partition.
The name is the string before the colon. The name is the string before the colon.
b. Dump the device mapper table. 2. Dump the device mapper table.
```bash ```bash
$ sudo dmsetup table docker-253:17-1835016-pool $ sudo dmsetup table docker-253:17-1835016-pool
@ -585,7 +586,7 @@ disk partition.
0 96460800 thin-pool 252:0 252:1 128 32768 1 skip_block_zeroing 0 96460800 thin-pool 252:0 252:1 128 32768 1 skip_block_zeroing
``` ```
c. Calculate the real total sectors of the thin pool now. we can use `blockdev` to get the real size of data lv. 3. Calculate the real total sectors of the thin pool now. we can use `blockdev` to get the real size of data lv.
Change the second number of the table info (i.e. the number of sectors) to Change the second number of the table info (i.e. the number of sectors) to
reflect the new number of 512 byte sectors in the disk. For example, as the reflect the new number of 512 byte sectors in the disk. For example, as the
@ -598,11 +599,12 @@ disk partition.
264132100096 264132100096
``` ```
d. Then reload the thin pool with the new sector number. 4. Then reload the thin pool with the new sector number.
```bash ```bash
$ sudo dmsetup suspend docker-253:17-1835016-pool \ $ sudo dmsetup suspend docker-253:17-1835016-pool \
&& sudo dmsetup reload docker-253:17-1835016-pool --table '0 515883008 thin-pool 252:0 252:1 128 32768 1 skip_block_zeroing' \ && sudo dmsetup reload docker-253:17-1835016-pool \
--table '0 515883008 thin-pool 252:0 252:1 128 32768 1 skip_block_zeroing' \
&& sudo dmsetup resume docker-253:17-1835016-pool && sudo dmsetup resume docker-253:17-1835016-pool
``` ```