Redis Deployment¶
1. Introduction¶
REmote DIctionary Server (Redis) is a key-value store system written by Salvatore Sanfilippo. It is a cross-platform NoSQL database.
Redis is an open-source, ANSI C language-based, BSD-licensed, networked, in-memory, distributed, optionally persistent key-value storage database that provides APIs for multiple programming languages.
Redis is often referred to as a data structure server because values can be strings, hashes, lists, sets, and sorted sets.
2. Prerequisites¶
- A deployed Kubernetes cluster
3. Installation¶
# If you need to modify the password, please update /etc/kubeasz/guance/infrastructure/yaml/redis.yaml in advance
# Create namespace
kubectl create ns middleware
# Deploy Redis service
kubectl apply -f /etc/kubeasz/guance/infrastructure/yaml/redis.yaml -n middleware
4. Verify Deployment and Configuration¶
4.1 Check Container Status¶
[root@k8s-node01 ]# kubectl get pods -n middleware | grep redis
redis-5f9b78c6d6-75b2j 1/1 Running 0 2m2s
4.2 Verify Service¶
Verify Redis Service Availability
# Default password "pNpX15GZkgICqX5D"
[root@k8s-node01 ~]# kubectl exec -it -n middleware redis-5f9b78c6d6-75b2j -- redis-cli
127.0.0.1:6379> auth pNpX15GZkgICqX5D
OK
127.0.0.1:6379> info
# Server
redis_version:5.0.7
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:825c96d6c798641
redis_mode:standalone
os:Linux 3.10.0-957.el7.x86_64 x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:8.3.0
process_id:1
run_id:9b86da362619ce26b54a1a4266d0b44aa0b44693
tcp_port:6379
uptime_in_seconds:254
uptime_in_days:0
hz:10
configured_hz:10
lru_clock:6527977
executable:/data/redis-server
config_file:/usr/local/etc/redis/redis.conf
# Clients
connected_clients:1
client_recent_max_input_buffer:2
client_recent_max_output_buffer:0
blocked_clients:0
# Memory
used_memory:854216
used_memory_human:834.20K
used_memory_rss:2920448
used_memory_rss_human:2.79M
used_memory_peak:854216
used_memory_peak_human:834.20K
used_memory_peak_perc:100.00%
used_memory_overhead:841014
used_memory_startup:791320
used_memory_dataset:13202
used_memory_dataset_perc:20.99%
allocator_allocated:1027544
allocator_active:1220608
allocator_resident:3780608
total_system_memory:16826011648
total_system_memory_human:15.67G
used_memory_lua:37888
used_memory_lua_human:37.00K
used_memory_scripts:0
used_memory_scripts_human:0B
number_of_cached_scripts:0
maxmemory:0
maxmemory_human:0B
maxmemory_policy:noeviction
allocator_frag_ratio:1.19
allocator_frag_bytes:193064
allocator_rss_ratio:3.10
allocator_rss_bytes:2560000
rss_overhead_ratio:0.77
rss_overhead_bytes:-860160
mem_fragmentation_ratio:3.60
mem_fragmentation_bytes:2108224
mem_not_counted_for_evict:0
mem_replication_backlog:0
mem_clients_slaves:0
mem_clients_normal:49694
mem_aof_buffer:0
mem_allocator:jemalloc-5.1.0
active_defrag_running:0
lazyfree_pending_objects:0
# Persistence
loading:0
rdb_changes_since_last_save:0
rdb_bgsave_in_progress:0
rdb_last_save_time:1667472108
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:-1
rdb_current_bgsave_time_sec:-1
rdb_last_cow_size:0
aof_enabled:1
aof_rewrite_in_progress:0
aof_rewrite_scheduled:0
aof_last_rewrite_time_sec:-1
aof_current_rewrite_time_sec:-1
aof_last_bgrewrite_status:ok
aof_last_write_status:ok
aof_last_cow_size:0
aof_current_size:0
aof_base_size:0
aof_pending_rewrite:0
aof_buffer_length:0
aof_rewrite_buffer_length:0
aof_pending_bio_fsync:0
aof_delayed_fsync:0
# Stats
total_connections_received:2
total_commands_processed:4
instantaneous_ops_per_sec:0
total_net_input_bytes:197
total_net_output_bytes:3624
instantaneous_input_kbps:0.00
instantaneous_output_kbps:0.00
rejected_connections:0
sync_full:0
sync_partial_ok:0
sync_partial_err:0
expired_keys:0
expired_stale_perc:0.00
expired_time_cap_reached_count:0
evicted_keys:0
keyspace_hits:0
keyspace_misses:0
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:0
migrate_cached_sockets:0
slave_expires_tracked_keys:0
active_defrag_hits:0
active_defrag_misses:0
active_defrag_key_hits:0
active_defrag_key_misses:0
# Replication
role:master
connected_slaves:0
master_replid:2122733a132fdb442c0ca49b643f77530b3f167c
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:0
second_repl_offset:-1
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0
# CPU
used_cpu_sys:0.228286
used_cpu_user:0.330661
used_cpu_sys_children:0.000000
used_cpu_user_children:0.000000
# Cluster
cluster_enabled:0
# Keyspace
127.0.0.1:6379>