Override the default value of containerd's root, state, and oom_score (#7622)

* Override the default value of containerd's root, state, and oom_score configurations

* Add tests data for containerd_storage_dir, containerd_state_dir and containerd_oom_score variables

inventory/sample/group_vars/all/containerd.yml

 ---
 # Please see roles/container-engine/containerd/defaults/main.yml for more configuration options
 
+# containerd_storage_dir: "/var/lib/containerd"
+# containerd_state_dir: "/run/containerd"
+# containerd_oom_score: 0
+
 # containerd_default_runtime: "runc"
 # containerd_snapshotter: "native"
 

roles/container-engine/containerd/defaults/main.yml

 ---
+containerd_storage_dir: "/var/lib/containerd"
+containerd_state_dir: "/run/containerd"
+containerd_oom_score: 0
 
 containerd_default_runtime: "runc"
 # containerd_snapshotter: "native"

roles/container-engine/containerd/templates/config.toml.j2

 version = 2
+root = "{{ containerd_storage_dir }}"
+state = "{{ containerd_state_dir }}"
+oom_score = {{ containerd_oom_score }}
 
 [grpc]
   max_recv_message_size = {{ containerd_grpc_max_recv_message_size | default(16777216) }}

tests/files/packet_centos7-flannel-containerd-addons-ha.yml

@@ -39,3 +39,8 @@ tls_cipher_suites:
 etcd_tls_cipher_suites:
   - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
   - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
+
+# Containerd
+containerd_storage_dir: /var/data/containerd
+containerd_state_dir: /run/cri/containerd
+containerd_oom_score: -999