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etcdctlv3: interactive_v3 del command update

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sharat 2016-09-26 19:35:07 +05:30
parent e2d51961dd
commit 83f2fa7adc
1 changed files with 41 additions and 4 deletions
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45
Documentation/dev-guide/interacting_v3.md
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@ -48,7 +48,7 @@ Applications can read values of keys from an etcd cluster. Queries may read a si
Suppose the etcd cluster has stored the following keys:
```
```bash
foo = bar
foo1 = bar1
foo3 = bar3
@ -106,7 +106,7 @@ Since every modification to the etcd cluster key-value store increments the glob
Suppose an etcd cluster already has the following keys:
``` bash
```bash
foo = bar # revision = 2
foo1 = bar1 # revision = 3
foo = bar_new # revision = 4
@ -147,7 +147,7 @@ Applications may want to read keys which are greater than or equal to the byte v
Suppose an etcd cluster already has the following keys:
``` bash
```bash
a = 123
b = 456
z = 789
@ -167,6 +167,20 @@ z
Applications can delete a key or a range of keys from an etcd cluster.
Suppose an etcd cluster already has the following keys:
```bash
foo = bar
foo1 = bar1
foo3 = bar3
zoo = val
zoo1 = val1
zoo2 = val2
a = 123
b = 456
z = 789
```
Here is the command to delete key `foo`:
```bash
@ -181,6 +195,29 @@ $ etcdctl del foo foo9
2 # two keys are deleted
```
Here is the command to delete key `zoo` with the deleted key value pair returned:
```bash
$ etcdctl del --prev-kv zoo
1 # one key is deleted
zoo # deleted key
val # the value of the deleted key
```
Here is the command to delete keys having prefix as `zoo`:
```bash
$ etcdctl del --prefix zoo
2 # two keys are deleted
```
Here is the command to delete keys which are greater than or equal to the byte value of key `b` :
```bash
$ etcdctl del --from-key b
2 # two keys are deleted
```
## Watch key changes
Applications can watch on a key or a range of keys to monitor for any updates.
@ -212,7 +249,7 @@ Applications may want to watch for historical changes of keys in etcd. For examp
Suppose we finished the following sequence of operations:
``` bash
```bash
etcdctl put foo bar # revision = 2
etcdctl put foo1 bar1 # revision = 3
etcdctl put foo bar_new # revision = 4