etcdctl returning wrong exit code

[manjeetvk]

We are testing clients against etcd port blocking using iptables.
Here are the iptable details, blocking 2379 INPUT and OUTPUT ports:

Chain INPUT (policy ACCEPT 17776 packets, 2046K bytes)
pkts bytes target prot opt in out source destination
0 0 DROP tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:2379

Chain OUTPUT (policy ACCEPT 26279 packets, 2279K bytes)
pkts bytes target prot opt in out source destination
521 29332 DROP tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:2379

So, when we are trying to access the key details in etcd, we are getting 4 as return code instead of 2.

$ /bin/sh -c 'etcdctl --debug get /test.com/foo;RC=$?; echo $RC'
start to sync cluster using endpoints(http://127.0.0.1:4001,http://127.0.0.1:2379)
cURL Command: curl -X GET http://127.0.0.1:4001/v2/members
cURL Command: curl -X GET http://127.0.0.1:2379/v2/members
got endpoints(http://127.0.0.1:4001,http://127.0.0.1:2379) after sync
Cluster-Endpoints: http://127.0.0.1:4001, http://127.0.0.1:2379
cURL Command: curl -X GET http://127.0.0.1:4001/v2/keys/test.com/foo?quorum=false&recursive=false&sorted=false
cURL Command: curl -X GET http://127.0.0.1:2379/v2/keys/test.com/foo?quorum=false&recursive=false&sorted=false
Error: client: etcd cluster is unavailable or misconfigured; error #0: dial tcp 127.0.0.1:4001: connect: connection refused
; error #1: client: endpoint http://127.0.0.1:2379 exceeded header timeout

error #0: dial tcp 127.0.0.1:4001: connect: connection refused
error #1: client: endpoint http://127.0.0.1:2379 exceeded header timeout

4

etcdctl version:
$ etcdctl -v
etcdctl version: 3.3.20
API version: 2

[stale]

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