etcd does not provide enough flexibility to configure server SSL and
client authentication separately. When configuring server SSL the
`--ca-file` flag is required to trust self-signed SSL certificates
used to service client requests.
The `--ca-file` has the side effect of enabling client cert
authentication. This can be surprising for those looking to simply
secure communication between an etcd server and client.
Resolve this issue by introducing four new flags:
--client-cert-auth
--peer-client-cert-auth
--trusted-ca-file
--peer-trusted-ca-file
These new flags will allow etcd to support a more explicit SSL
configuration for both etcd clients and peers.
Example usage:
Start etcd with server SSL and no client cert authentication:
etcd -name etcd0 \
--advertise-client-urls https://etcd0.example.com:2379 \
--cert-file etcd0.example.com.crt \
--key-file etcd0.example.com.key \
--trusted-ca-file ca.crt
Start etcd with server SSL and enable client cert authentication:
etcd -name etcd0 \
--advertise-client-urls https://etcd0.example.com:2379 \
--cert-file etcd0.example.com.crt \
--key-file etcd0.example.com.key \
--trusted-ca-file ca.crt \
--client-cert-auth
Start etcd with server SSL and client cert authentication for both
peer and client endpoints:
etcd -name etcd0 \
--advertise-client-urls https://etcd0.example.com:2379 \
--cert-file etcd0.example.com.crt \
--key-file etcd0.example.com.key \
--trusted-ca-file ca.crt \
--client-cert-auth \
--peer-cert-file etcd0.example.com.crt \
--peer-key-file etcd0.example.com.key \
--peer-trusted-ca-file ca.crt \
--peer-client-cert-auth
This change is backwards compatible with etcd versions 2.0.0+. The
current behavior of the `--ca-file` flag is preserved.
Fixes#2499.
Support IPv6 address for ETCD_ADDR and ETCD_PEER_ADDR
pkg/flags: Support IPv6 address for ETCD_ADDR and ETCD_PEER_ADDR
pkg/flags: tests for IPv6 addr and bind-addr flags
pkg/flags: IPAddressPort.Host: do not enclose IPv6 address in square brackets
pkg/flags: set default bind address to [::] instead of 0.0.0.0
pkg/flags: we don't need fmt any more
also, one minor fix: net.JoinHostPort takes string as a port value
pkg/flags: fix ipv6 tests
pkg/flags: test both IPv4 and IPv6 addresses in TestIPAddressPortString
etcdmain: test: use [::] instead of 0.0.0.0
If the TLS config is empty, etcd downgrades https to http without a warning.
This commit avoid the downgrade and stoping etcd from bootstrap if it cannot
listen on TLS.
for transport that are using timeout connections, we set the
maxIdleConnsPerHost to -1. The default transport does not clear
the timeout for the connections it sets to be idle. So the connections
with timeout cannot be reused.
Dial timeout is set shorter because
1. etcd is supposed to work in good environment, and the new value is long
enough
2. shorter dial timeout makes dial fail faster, which is good for
performance
The functionality in pkg/osutil ensures that all interrupt handlers finish
and the process kills itself with the proper signal.
Test for interrupt handling added.
The server shutsdown gracefully by stopping on interrupt (Issue #2277.)
etcd resolves DNS hostnames to IP addresses for client and peer URLs
before creating any listening sockets.
The following messages are logged during startup:
etcd: Resolving infra0.coreos.com:2380 to 10.0.1.10:2380
Fixes#1991
Kelsey Hightower