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Cassandra: Fix TLS host verification #2109

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Merged
merged 4 commits into from
Apr 3, 2020
Merged

Cassandra: Fix TLS host verification #2109

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917aef1
Fix Cassandra TLS host verification
joshmue Mar 27, 2020
0fe2347
Add changelog entry for Cassandra TLS verification fix
joshmue Mar 27, 2020
68d5067
Move check for number of cassandra hosts to cfg.Validate()
joshmue Mar 30, 2020
804b0f1
Merge branch 'master' into cassandra_tls_verification
pstibrany Apr 3, 2020
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
* [ENHANCEMENT] Added `cortex_distributor_latest_seen_sample_timestamp_seconds` metric to see how far behind Prometheus servers are in sending data. #2371
* [ENHANCEMENT] FIFO cache to support eviction based on memory usage. The `-<prefix>.fifocache.size` CLI flag has been renamed to `-<prefix>.fifocache.max-size-items` as well as its YAML config option `size` renamed to `max_size_items`. Added `-<prefix>.fifocache.max-size-bytes` CLI flag and YAML config option `max_size_bytes` to specify memory limit of the cache. #2319
* [BUGFIX] Experimental TSDB: fixed chunk data corruption when querying back series using the experimental blocks storage. #2400
* [BUGFIX] Cassandra Storage: Fix endpoint TLS host verification. #2109

## 1.0.0 / 2020-04-02

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19 changes: 16 additions & 3 deletions pkg/chunk/cassandra/storage_client.go
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Expand Up @@ -3,6 +3,7 @@ package cassandra
import (
"bytes"
"context"
"crypto/tls"
"flag"
"fmt"
"io/ioutil"
Expand Down Expand Up @@ -68,6 +69,9 @@ func (cfg *Config) Validate() error {
if cfg.Password.Value != "" && cfg.PasswordFile != "" {
return errors.Errorf("The password and password_file config options are mutually exclusive.")
}
if cfg.SSL && cfg.HostVerification && len(strings.Split(cfg.Addresses, ",")) != 1 {
return errors.Errorf("Host verification is only possible for a single host.")
}
return nil
}

Expand Down Expand Up @@ -118,9 +122,18 @@ func (cfg *Config) setClusterConfig(cluster *gocql.ClusterConfig) error {
cluster.DisableInitialHostLookup = cfg.DisableInitialHostLookup

if cfg.SSL {
cluster.SslOpts = &gocql.SslOptions{
CaPath: cfg.CAPath,
EnableHostVerification: cfg.HostVerification,
if cfg.HostVerification {
cluster.SslOpts = &gocql.SslOptions{
CaPath: cfg.CAPath,
EnableHostVerification: true,
Config: &tls.Config{
ServerName: strings.Split(cfg.Addresses, ",")[0],
},
}
} else {
cluster.SslOpts = &gocql.SslOptions{
EnableHostVerification: false,
}
}
}
if cfg.Auth {
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