KV GET/POST using curl?

[mic...@portworx.com]

I'm trying to evaluate the K/V feature of consul as a replacement for etcd.  The doesn't seem to be a tool that will POST values to the KV store like etcdctl.  I can post via the web site, but we want do this from a program.  My boss want to demonstrate this with curl which, AFAICT, can't do POSTs.

Can anyone help me out here?

[mic...@portworx.com]

I found the answer.  Apparently, my googlefoo sucks from time to time.  This came right up when I searched for "consul curl KV pairs"

https://www.consul.io/intro/getting-started/kv.html

[David Adams]

Heh, actually that last line should be:

$ curl -Ss -XGET localhost:8500/v1/kv/test/hello |jq -r '.[].Value' |base64 -d

I was editing my actual commands to something simpler and missed that change.

Anyway, so this message is not entirely content-free, to clean up you use DELETE:

$ curl -XDELETE localhost:8500/v1/kv/test/hello

true

$ curl -iSs localhost:8500/v1/kv/test/hello

HTTP/1.1 404 Not Found

X-Consul-Index: 4831831

X-Consul-Knownleader: true

X-Consul-Lastcontact: 0

Date: Thu, 08 Sep 2016 18:19:49 GMT

Content-Length: 0

Content-Type: text/plain; charset=utf-8

(-i displays the headers, -XGET is implicit if there's no -d, -s silences any terminal feedback (eg when piping thru other commands, curl will print a progress bar by default), -S unsilences actual error messages)

On Thu, Sep 8, 2016 at 1:18 PM, David Adams <dave...@gmail.com> wrote:

curl can do POST. you just need to specify data to send with `-d "content goes here"`. Or you can be explicit about the verb with -X<verb>.

Altho, the write values to Consul, you need to use PUT, not POST:

$ curl -XPUT localhost:8500/v1/kv/test/hello -d "hello world"

true

$ curl -XGET localhost:8500/v1/kv/test/hello

[{"LockIndex":0,"Key":"test/hello","Flags":0,"Value":"aGVsbG8gd29ybGQ=","CreateIndex":4831750,"ModifyIndex":4831761}]

$ curl -Ss -XGET localhost:8500/v1/kv/shared/common/test |jq -r '.[].Value' |base64 -d

hello world

On Thu, Sep 8, 2016 at 12:48 PM, <mic...@portworx.com> wrote:

I'm trying to evaluate the K/V feature of consul as a replacement for etcd.  The doesn't seem to be a tool that will POST values to the KV store like etcdctl.  I can post via the web site, but we want do this from a program.  My boss want to demonstrate this with curl which, AFAICT, can't do POSTs.

Can anyone help me out here?

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[David Adams]

curl can do POST. you just need to specify data to send with `-d "content goes here"`. Or you can be explicit about the verb with -X<verb>.

Altho, the write values to Consul, you need to use PUT, not POST:

$ curl -XPUT localhost:8500/v1/kv/test/hello -d "hello world"

true

$ curl -XGET localhost:8500/v1/kv/test/hello

[{"LockIndex":0,"Key":"test/hello","Flags":0,"Value":"aGVsbG8gd29ybGQ=","CreateIndex":4831750,"ModifyIndex":4831761}]

$ curl -Ss -XGET localhost:8500/v1/kv/shared/common/test |jq -r '.[].Value' |base64 -d

hello world

On Thu, Sep 8, 2016 at 12:48 PM, <mic...@portworx.com> wrote:

I'm trying to evaluate the K/V feature of consul as a replacement for etcd.  The doesn't seem to be a tool that will POST values to the KV store like etcdctl.  I can post via the web site, but we want do this from a program.  My boss want to demonstrate this with curl which, AFAICT, can't do POSTs.

Can anyone help me out here?

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