glusterd/cli: cli to get local state representation from glusterd

Currently there is no existing CLI that can be used to get the
local state representation of the cluster as maintained in glusterd
in a readable as well as parseable format.

The CLI added has the following usage:

 # gluster get-state [daemon] [odir <path/to/output/dir>] [file <filename>]

This would dump data points that reflect the local state
representation of the cluster as maintained in glusterd (no other
daemons are supported as of now) to a file inside the specified
output directory. The default output directory and filename is
/var/run/gluster and glusterd_state_<timestamp> respectively. The
option for specifying the daemon name leaves room to add support for
other daemons in the future. Following are the data points captured
as of now to represent the state from the local glusterd pov:

 * Peer:
    - Primary hostname
    - uuid
    - state
    - connection status
    - List of hostnames

 * Volumes:
    - name, id, transport type, status
    - counts: bricks, snap, subvol, stripe, arbiter, disperse,
 redundancy
    - snapd status
    - quorum status
    - tiering related information
    - rebalance status
    - replace bricks status
    - snapshots

 * Bricks:
    - Path, hostname (for all bricks these info will be shown)
    - port, rdma port, status, mount options, filesystem type and
signed in status for bricks running locally.

 * Services:
    - name, online status for initialised services

 * Others:
    - Base port, last allocated port
    - op-version
    - MYUUID

Change-Id: I4a45cc5407ab92d8afdbbd2098ece851f7e3d618
BUG: 1353156
Signed-off-by: Samikshan Bairagya <samikshan@gmail.com>
Reviewed-on: http://review.gluster.org/14873
Reviewed-by: Avra Sengupta <asengupt@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>

1 files changed, 104 insertions, 31 deletions

diff --git a/cli/src/cli-rpc-ops.c b/cli/src/cli-rpc-ops.c
index 441f4247c45..a8a26c820dd 100644
--- a/cli/src/cli-rpc-ops.c
+++ b/cli/src/cli-rpc-ops.c
@@ -55,17 +55,6 @@ int32_t
 gf_cli_remove_brick (call_frame_t *frame, xlator_t *this,
                      void *data);
 
-char *cli_vol_type_str[] = {"Distribute",
-                            "Stripe",
-                            "Replicate",
-                            "Striped-Replicate",
-                            "Disperse",
-                            "Tier",
-                            "Distributed-Stripe",
-                            "Distributed-Replicate",
-                            "Distributed-Striped-Replicate",
-                            "Distributed-Disperse",
-                           };
 
 char *cli_vol_status_str[] = {"Created",
                               "Started",
@@ -503,6 +492,73 @@ out:
         return ret;
 }
 
+int
+gf_cli_get_state_cbk (struct rpc_req *req, struct iovec *iov,
+                      int count, void *myframe)
+{
+        gf_cli_rsp           rsp            = {0,};
+        int                  ret            = -1;
+        dict_t               *dict          = NULL;
+        char                 *daemon_name   = NULL;
+        char                 *ofilepath     = NULL;
+
+        GF_VALIDATE_OR_GOTO ("cli", myframe, out);
+
+        if (-1 == req->rpc_status) {
+                goto out;
+        }
+        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gf_cli_rsp);
+        if (ret < 0) {
+                gf_log (((call_frame_t *) myframe)->this->name, GF_LOG_ERROR,
+                        "Failed to decode xdr response");
+                goto out;
+        }
+
+        dict = dict_new ();
+
+        if (!dict) {
+                ret = -1;
+                goto out;
+        }
+
+        ret = dict_unserialize (rsp.dict.dict_val, rsp.dict.dict_len, &dict);
+        if (ret)
+                goto out;
+
+        if (rsp.op_ret) {
+                if (strcmp (rsp.op_errstr, ""))
+                        cli_err ("Failed to get daemon state: %s", rsp.op_errstr);
+                else
+                        cli_err ("Failed to get daemon state. Check glusterd"
+                                 " log file for more details");
+        } else {
+                ret = dict_get_str (dict, "daemon", &daemon_name);
+                if (ret)
+                        gf_log ("cli", GF_LOG_ERROR, "Couldn't get daemon name");
+
+                ret = dict_get_str (dict, "ofilepath", &ofilepath);
+                if (ret)
+                        gf_log ("cli", GF_LOG_ERROR, "Couldn't get filepath");
+
+                if (daemon_name && ofilepath)
+                        cli_out ("%s state dumped to %s",
+                                 daemon_name, ofilepath);
+        }
+
+        ret = rsp.op_ret;
+
+out:
+        free (rsp.dict.dict_val);
+        free (rsp.op_errstr);
+
+        if (dict)
+                dict_unref (dict);
+
+        cli_cmd_broadcast_response (ret);
+
+        return ret;
+}
+
 void
 cli_out_options ( char *substr, char *optstr, char *valstr)
 {
@@ -725,13 +781,11 @@ gf_cli_print_tier_info (dict_t *dict, int i, int brick_count)
         vol_type = hot_type;
         hot_dist_count = (hot_replica_count ?
                           hot_replica_count : 1);
-        if ((hot_type != GF_CLUSTER_TYPE_TIER) &&
-            (hot_type > 0) &&
-            (hot_dist_count < hot_brick_count))
-                vol_type = hot_type + GF_CLUSTER_TYPE_MAX - 1;
 
+        vol_type = get_vol_type (hot_type, hot_dist_count, hot_brick_count);
         cli_out ("Hot Tier Type : %s",
-                 cli_vol_type_str[vol_type]);
+                 vol_type_str[vol_type]);
+
         gf_cli_print_number_of_bricks (hot_type,
                         hot_brick_count, hot_dist_count, 0,
                         hot_replica_count, 0, 0, 0);
@@ -742,14 +796,11 @@ gf_cli_print_tier_info (dict_t *dict, int i, int brick_count)
                 goto out;
 
         cli_out ("Cold Tier:");
-        vol_type = cold_type;
-        if ((cold_type != GF_CLUSTER_TYPE_TIER) &&
-            (cold_type > 0) &&
-            (cold_dist_count < cold_brick_count))
-                vol_type = cold_type + GF_CLUSTER_TYPE_MAX - 1;
 
+        vol_type = get_vol_type (cold_type, cold_dist_count, cold_brick_count);
         cli_out ("Cold Tier Type : %s",
-                        cli_vol_type_str[vol_type]);
+                        vol_type_str[vol_type]);
+
         gf_cli_print_number_of_bricks (cold_type,
                 cold_brick_count,
                 cold_dist_count, 0, cold_replica_count,
@@ -973,15 +1024,11 @@ xml_output:
                 if (ret)
                         goto out;
 
-                vol_type = type;
-
                 // Distributed (stripe/replicate/stripe-replica) setups
-                if ((type != GF_CLUSTER_TYPE_TIER) && (type > 0) &&
-                    (dist_count < brick_count))
-                       vol_type = type + GF_CLUSTER_TYPE_MAX - 1;
+                vol_type = get_vol_type (type, dist_count, brick_count);
 
                 cli_out ("Volume Name: %s", volname);
-                cli_out ("Type: %s", cli_vol_type_str[vol_type]);
+                cli_out ("Type: %s", vol_type_str[vol_type]);
                 cli_out ("Volume ID: %s", volume_id_str);
                 cli_out ("Status: %s", cli_vol_status_str[status]);
                 cli_out ("Snapshot Count: %d", snap_count);
@@ -4151,6 +4198,32 @@ out:
 }
 
 int32_t
+gf_cli_get_state (call_frame_t *frame, xlator_t *this, void *data)
+{
+        gf_cli_req              req =  {{0,},};
+        int                     ret = 0;
+        dict_t                  *dict = NULL;
+
+        char                    *odir       =  NULL;
+
+        if (!frame || !this ||  !data) {
+                ret = -1;
+                goto out;
+        }
+
+        dict = data;
+
+        ret = cli_to_glusterd (&req, frame, gf_cli_get_state_cbk,
+                               (xdrproc_t) xdr_gf_cli_req, dict,
+                               GLUSTER_CLI_GET_STATE, this, cli_rpc_prog,
+                               NULL);
+out:
+        gf_log ("cli", GF_LOG_DEBUG, "Returning %d", ret);
+
+        return ret;
+}
+
+int32_t
 gf_cli_get_next_volume (call_frame_t *frame, xlator_t *this,
                            void *data)
 {
@@ -10918,7 +10991,6 @@ cli_to_glusterd (gf_cli_req *req, call_frame_t *frame,
 
         ret = cli_cmd_submit (NULL, req, frame, prog, procnum, iobref, this,
                               cbkfn, (xdrproc_t) xdrproc);
-
 out:
         return ret;
 
@@ -11256,7 +11328,7 @@ struct rpc_clnt_procedure gluster_cli_actors[GLUSTER_CLI_MAXVALUE] = {
         [GLUSTER_CLI_DEPROBE]          = {"DEPROBE_QUERY", gf_cli_deprobe},
         [GLUSTER_CLI_LIST_FRIENDS]     = {"LIST_FRIENDS", gf_cli_list_friends},
         [GLUSTER_CLI_UUID_RESET]       = {"UUID_RESET", gf_cli3_1_uuid_reset},
-        [GLUSTER_CLI_UUID_GET]       = {"UUID_GET", gf_cli3_1_uuid_get},
+        [GLUSTER_CLI_UUID_GET]         = {"UUID_GET", gf_cli3_1_uuid_get},
         [GLUSTER_CLI_CREATE_VOLUME]    = {"CREATE_VOLUME", gf_cli_create_volume},
         [GLUSTER_CLI_DELETE_VOLUME]    = {"DELETE_VOLUME", gf_cli_delete_volume},
         [GLUSTER_CLI_START_VOLUME]     = {"START_VOLUME", gf_cli_start_volume},
@@ -11297,7 +11369,8 @@ struct rpc_clnt_procedure gluster_cli_actors[GLUSTER_CLI_MAXVALUE] = {
         [GLUSTER_CLI_BITROT]           = {"BITROT", gf_cli_bitrot},
         [GLUSTER_CLI_ATTACH_TIER]      = {"ATTACH_TIER", gf_cli_attach_tier},
         [GLUSTER_CLI_DETACH_TIER]      = {"DETACH_TIER", gf_cli_detach_tier},
-        [GLUSTER_CLI_TIER]             = {"TIER", gf_cli_tier}
+        [GLUSTER_CLI_TIER]             = {"TIER", gf_cli_tier},
+        [GLUSTER_CLI_GET_STATE]        = {"GET_STATE", gf_cli_get_state}
 };
 
 struct rpc_clnt_program cli_prog = {